About “Denial of Service (DoS)”

A curated feed of “Denial of Service (DoS)”-related CVEs appears below. We currently track 39647 CVEs for this tag (all time). In the last 365 days, 3219 were published. Average CVSS is 6.6 (all time; 6.6 over 365d), and 47% are rated High/Critical (all time). Top CWEs (last 365 days): CWE-400 - Uncontrolled Resource Consumption, CWE-770 - Allocation of Resources Without Limits or Throttling, CWE-476 - NULL Pointer Dereference.

In our taxonomy this topic maps to a LOW impact class. Vendor advisories and release notes are key. Verify compatibility matrices, prefer supported long term versions, and stage rollouts with monitoring. Use the filters below to sort by CVSS, risk and CWE. Each detail page highlights vendor advisories and mitigation tips.

CVEs tagged with this topic. Filters apply to the whole list (loaded from JSON).

CVSS ≥ 0.0
2000-12-19
Medium

CVE-2000-0983

Microsoft NetMeeting with Remote Desktop Sharing enabled allows remote attackers to cause a denial of service (CPU utilization) via a sequence of null bytes to the NetMeeting port, aka the "NetMeetin…

Medium

CVE-2000-0984

The HTTP server in Cisco IOS 12.0 through 12.1 allows local users to cause a denial of service (crash and reload) via a URL containing a "?/" string.

Medium

CVE-2000-0989

Buffer overflow in Intel InBusiness eMail Station 1.04.87 POP service allows remote attackers to cause a denial of service and possibly execute commands via a long username.

High

CVE-2000-0990

cmd5checkpw 0.21 and earlier allows remote attackers to cause a denial of service via an "SMTP AUTH" command with an unknown username.

2000-12-14
Medium

CVE-1999-1579

The Cenroll ActiveX control (xenroll.dll) for Terminal Server Editions of Windows NT 4.0 and Windows NT Server 4.0 before SP6 allows remote attackers to cause a denial of service (resource consumptio…

2000-12-11
Medium

CVE-2000-1000

Format string vulnerability in AOL Instant Messenger (AIM) 4.1.2010 allows remote attackers to cause a denial of service and possibly execute arbitrary commands by transferring a file whose name incl…

Low

CVE-2000-1003

NETBIOS client in Windows 95 and Windows 98 allows a remote attacker to cause a denial of service by changing a file sharing service to return an unknown driver type, which causes the client to crash.

Medium

CVE-2000-1006

Microsoft Exchange Server 5.5 does not properly handle a MIME header with a blank charset specified, which allows remote attackers to cause a denial of service via a charset="" command, aka the "Malf…

Medium

CVE-2000-1019

Search engine in Ultraseek 3.1 and 3.1.10 (aka Inktomi Search) allows remote attackers to cause a denial of service via a malformed URL.

High

CVE-2000-1020

Heap overflow in Worldclient in Mdaemon 3.1.1 and earlier allows remote attackers to cause a denial of service and possibly execute arbitrary commands via a long URL.

High

CVE-2000-1021

Heap overflow in WebConfig in Mdaemon 3.1.1 and earlier allows remote attackers to cause a denial of service and possibly execute arbitrary commands via a long URL.

Medium

CVE-2000-1025

eWave ServletExec JSP/Java servlet engine, versions 3.0C and earlier, allows remote attackers to cause a denial of service via a URL that contains the "/servlet/" string, which invokes the ServletExe…

Critical

CVE-2000-1035

Buffer overflows in TYPSoft FTP Server 0.78 and earlier allows remote attackers to cause a denial of service and possibly execute arbitrary commands via a long USER, PASS, or CWD command.

Medium

CVE-2000-1038

The web administration interface for IBM AS/400 Firewall allows remote attackers to cause a denial of service via an empty GET request.

Critical

CVE-2000-1040

Format string vulnerability in logging function of ypbind 3.3, while running in debug mode, leaks file descriptors and allows an attacker to cause a denial of service.

Low

CVE-2000-1045

nss_ldap earlier than 121, when run with nscd (name service caching daemon), allows remote attackers to cause a denial of service via a flood of LDAP requests.

Critical

CVE-2000-1046

Multiple buffer overflows in the ESMTP service of Lotus Domino 5.0.2c and earlier allow remote attackers to cause a denial of service and possibly execute arbitrary code via long (1) "RCPT TO," (2) "…

Critical

CVE-2000-1047

Buffer overflow in SMTP service of Lotus Domino 5.0.4 and earlier allows remote attackers to cause a denial of service and possibly execute arbitrary commands via a long ENVID keyword in the "MAIL FR…

Medium

CVE-2000-1049

Allaire JRun 3.0 http servlet server allows remote attackers to cause a denial of service via a URL that contains a long string of "." characters.

Critical

CVE-2000-1054

Buffer overflow in CSAdmin module in CiscoSecure ACS Server 2.4(2) and earlier allows remote attackers to cause a denial of service and possibly execute arbitrary commands via a large packet.

Critical

CVE-2000-1055

Buffer overflow in CiscoSecure ACS Server 2.4(2) and earlier allows remote attackers to cause a denial of service and possibly execute arbitrary commands via a large TACACS+ packet.

Medium

CVE-2000-1058

Buffer overflow in OverView5 CGI program in HP OpenView Network Node Manager (NNM) 6.1 and earlier allows remote attackers to cause a denial of service, and possibly execute arbitrary commands, in th…

Medium

CVE-2000-1062

Buffer overflow in the FTP service in HP JetDirect printer card Firmware x.08.20 and earlier allows remote attackers to cause a denial of service.

Medium

CVE-2000-1063

Buffer overflow in the Telnet service in HP JetDirect printer card Firmware x.08.20 and earlier allows remote attackers to cause a denial of service.

Medium

CVE-2000-1064

Buffer overflow in the LPD service in HP JetDirect printer card Firmware x.08.20 and earlier allows remote attackers to cause a denial of service.

Medium

CVE-2000-1065

Vulnerability in IP implementation of HP JetDirect printer card Firmware x.08.20 and earlier allows remote attackers to cause a denial of service (printer crash) via a malformed packet.

Medium

CVE-2000-1066

The getnameinfo function in FreeBSD 4.1.1 and earlier, and possibly other operating systems, allows a remote attacker to cause a denial of service via a long DNS hostname.

Medium

CVE-2000-1078

ICQ Web Front HTTPd allows remote attackers to cause a denial of service by requesting a URL that contains a "?" character.

2000-11-14
Medium

CVE-2000-0806

The inter-module authentication mechanism (fwa1) in Check Point VPN-1/FireWall-1 4.1 and earlier may allow remote attackers to conduct a denial of service, aka "Inter-module Communications Bypass."

Medium

CVE-2000-0809

Buffer overflow in Getkey in the protocol checker in the inter-module communication mechanism in Check Point VPN-1/FireWall-1 4.1 and earlier allows remote attackers to cause a denial of service.

Medium

CVE-2000-0825

Ipswitch Imail 6.0 allows remote attackers to cause a denial of service via a large number of connections in which a long Host: header is sent, which causes a thread to crash.

Critical

CVE-2000-0827

Buffer overflow in the web authorization form of Mobius DocumentDirect for the Internet 1.2 allows remote attackers to cause a denial of service or execute arbitrary commands via a long username.

Low

CVE-2000-0829

The tmpwatch utility in Red Hat Linux forks a new process for each directory level, which allows local users to cause a denial of service by creating deeply nested directories in /tmp or /var/tmp/.

Medium

CVE-2000-0830

annclist.exe in webTV for Windows allows remote attackers to cause a denial of service by via a large, malformed UDP packet to ports 22701 through 22705.

High

CVE-2000-0831

Buffer overflow in Fastream FTP++ 2.0 allows remote attackers to cause a denial of service and possibly execute arbitrary commands via a long username.

Critical

CVE-2000-0833

Buffer overflow in WinSMTP 1.06f and 2.X allows remote attackers to cause a denial of service via a long (1) USER or (2) HELO command.

Medium

CVE-2000-0837

FTP Serv-U 2.5e allows remote attackers to cause a denial of service by sending a large number of null bytes.

Medium

CVE-2000-0838

Fastream FUR HTTP server 1.0b allows remote attackers to cause a denial of service via a long GET request.

Medium

CVE-2000-0839

WinCOM LPD 1.00.90 allows remote attackers to cause a denial of service via a large number of LPD options to the LPD port (515).

Low

CVE-2000-0849

Race condition in Microsoft Windows Media server allows remote attackers to cause a denial of service in the Windows Media Unicast Service via a malformed request, aka the "Unicast Service Race Condi…

Medium

CVE-2000-0855

SunFTP build 9(1) allows remote attackers to cause a denial of service by connecting to the server and disconnecting before sending a newline.

High

CVE-2000-0856

Buffer overflow in SunFTP build 9(1) allows remote attackers to cause a denial of service or possibly execute arbitrary commands via a long GET request.

High

CVE-2000-0857

The logging capability in muh 2.05d IRC server does not properly cleanse user-injected format strings, which allows remote attackers to cause a denial of service or execute arbitrary commands via a m…

Medium

CVE-2000-0858

Vulnerability in Microsoft Windows NT 4.0 allows remote attackers to cause a denial of service in IIS by sending it a series of malformed requests which cause INETINFO.EXE to fail, aka the "Invalid U…

Medium

CVE-2000-0859

The web configuration server for NTMail V5 and V6 allows remote attackers to cause a denial of service via a series of partial HTTP requests.

Low

CVE-2000-0866

Interbase 6 SuperServer for Linux allows an attacker to cause a denial of service via a query containing 0 bytes.

High

CVE-2000-0870

Buffer overflow in EFTP allows remote attackers to cause a denial of service via a long string.

Medium

CVE-2000-0871

Buffer overflow in EFTP allows remote attackers to cause a denial of service by sending a string that does not contain a newline, then disconnecting from the server.

Medium

CVE-2000-0875

WFTPD and WFTPD Pro 2.41 RC12 allows remote attackers to cause a denial of service by sending a long string of unprintable characters.

Medium

CVE-2000-0882

Intel Express 500 series switches allow a remote attacker to cause a denial of service via a malformed ICMP packet, which causes the CPU to crash.

2000-11-01
Medium

CVE-2000-1080

Quake 1 (quake1) and ProQuake 1.01 and earlier allow remote attackers to cause a denial of service via a malformed (empty) UDP packet.

2000-10-20
Critical

CVE-2000-0359

Buffer overflow in Trivial HTTP (THTTPd) allows remote attackers to cause a denial of service or execute arbitrary commands via a long If-Modified-Since header.

Medium

CVE-2000-0360

Buffer overflow in INN 2.2.1 and earlier allows remote attackers to cause a denial of service via a maliciously formatted article.

Medium

CVE-2000-0692

ISS RealSecure 3.2.1 and 3.2.2 allows remote attackers to cause a denial of service via a flood of fragmented packets with the SYN flag set.

Critical

CVE-2000-0699

Format string vulnerability in ftpd in HP-UX 10.20 allows remote attackers to cause a denial of service or execute arbitrary commands via format strings in the PASS command.

Medium

CVE-2000-0708

Buffer overflow in Pragma Systems TelnetServer 2000 version 4.0 allows remote attackers to cause a denial of service via a long series of null characters to the rexec port.

Medium

CVE-2000-0709

The shtml.exe component of Microsoft FrontPage 2000 Server Extensions 1.1 allows remote attackers to cause a denial of service in some components by requesting a URL whose name includes a standard DO…

Medium

CVE-2000-0710

The shtml.exe component of Microsoft FrontPage 2000 Server Extensions 1.1 allows remote attackers to determine the physical path of the server components by requesting an invalid URL whose name inclu…

Medium

CVE-2000-0717

GoodTech FTP server allows remote attackers to cause a denial of service via a large number of RNTO commands.

Low

CVE-2000-0729

FreeBSD 5.x, 4.x, and 3.x allows local users to cause a denial of service by executing a program with a malformed ELF image header.

Medium

CVE-2000-0732

Worm HTTP server allows remote attackers to cause a denial of service via a long URL.

Medium

CVE-2000-0734

eEye IRIS 1.01 beta allows remote attackers to cause a denial of service via a large number of UDP connections.

Medium

CVE-2000-0735

Buffer overflow in Becky! Internet Mail client 1.26.03 and earlier allows remote attackers to cause a denial of service via a long Content-type: MIME header when the user replies to a message.

Medium

CVE-2000-0736

Buffer overflow in Becky! Internet Mail client 1.26.04 and earlier allows remote attackers to cause a denial of service via a long Content-type: MIME header when the user forwards a message.

Medium

CVE-2000-0738

WebShield SMTP 4.5 allows remote attackers to cause a denial of service by sending e-mail with a From: address that has a . (period) at the end, which causes WebShield to continuously send itself cop…

Medium

CVE-2000-0742

The IPX protocol implementation in Microsoft Windows 95 and 98 allows remote attackers to cause a denial of service by sending a ping packet with a source IP address that is a broadcast address, aka…

Medium

CVE-2000-0756

Microsoft Outlook 2000 does not properly process long or malformed fields in vCard (.vcf) files, which allows attackers to cause a denial of service.

Medium

CVE-2000-0761

OS2/Warp 4.5 FTP server allows remote attackers to cause a denial of service via a long username.

Medium

CVE-2000-0764

Intel Express 500 series switches allow a remote attacker to cause a denial of service via a malformed IP packet.

High

CVE-2000-0766

Buffer overflow in vqSoft vqServer 1.4.49 allows remote attackers to cause a denial of service or possibly gain privileges via a long HTTP GET request.

Low

CVE-2000-0771

Microsoft Windows 2000 allows local users to cause a denial of service by corrupting the local security policy via malformed RPC traffic, aka the "Local Security Policy Corruption" vulnerability.

High

CVE-2000-0775

Buffer overflow in RobTex Viking server earlier than 1.06-370 allows remote attackers to cause a denial of service or execute arbitrary commands via a long HTTP GET request, or long Unless-Modified-S…

Medium

CVE-2000-0783

Watchguard Firebox II allows remote attackers to cause a denial of service by sending a malformed URL to the authentication service on port 4100.

2000-10-14
Medium

CVE-1999-1563

Nachuatec D435 and D445 printer allows remote attackers to cause a denial of service via ICMP redirect storm.

2000-08-03
Medium

CVE-2000-0278

The SalesLogix Eviewer allows remote attackers to cause a denial of service by accessing the URL for the slxweb.dll administration program, which does not authenticate the user.

2000-07-27
Low

CVE-2000-0667

Vulnerability in gpm in Caldera Linux allows local users to delete arbitrary files or conduct a denial of service.

Medium

CVE-2000-0673

The NetBIOS Name Server (NBNS) protocol does not perform authentication, which allows remote attackers to cause a denial of service by sending a spoofed Name Conflict or Name Release datagram, aka th…

2000-07-25
Medium

CVE-2000-0655

Netscape Communicator 4.73 and earlier allows remote attackers to cause a denial of service or execute arbitrary commands via a JPEG image containing a comment with an illegal field length of 1.

Medium

CVE-2000-0656

Buffer overflow in AnalogX proxy server 4.04 and earlier allows remote attackers to cause a denial of service via a long USER command in the FTP protocol.

Medium

CVE-2000-0657

Buffer overflow in AnalogX proxy server 4.04 and earlier allows remote attackers to cause a denial of service via a long HELO command in the SMTP protocol.

Medium

CVE-2000-0658

Buffer overflow in AnalogX proxy server 4.04 and earlier allows remote attackers to cause a denial of service via a long USER command in the POP3 protocol.

Medium

CVE-2000-0659

Buffer overflow in AnalogX proxy server 4.04 and earlier allows remote attackers to cause a denial of service via a long user ID in a SOCKS4 CONNECT request.

2000-07-21
Medium

CVE-2000-0644

WFTPD and WFTPD Pro 2.41 allows remote attackers to cause a denial of service by executing a STAT command while the LIST command is still executing.

Medium

CVE-2000-0645

WFTPD and WFTPD Pro 2.41 allows remote attackers to cause a denial of service by using the RESTART (REST) command and writing beyond the end of a file, or writing to a file that does not exist, via c…

Medium

CVE-2000-0647

WFTPD and WFTPD Pro 2.41 allows remote attackers to cause a denial of service by executing an MLST command before logging into the server.

2000-07-19
Medium

CVE-2000-0619

Top Layer AppSwitch 2500 allows remote attackers to cause a denial of service via malformed ICMP packets.

Medium

CVE-2000-0636

HP JetDirect printers versions G.08.20 and H.08.20 and earlier allow remote attackers to cause a denial of service via a malformed FTP quote command.

2000-07-18
Medium

CVE-2000-0626

Buffer overflow in Alibaba web server allows remote attackers to cause a denial of service via a long GET request.

2000-07-17
Medium

CVE-2000-0665

GAMSoft TelSrv telnet server 1.5 and earlier allows remote attackers to cause a denial of service via a long username.

2000-07-14
Medium

CVE-2000-0631

An administrative script from IIS 3.0, later included in IIS 4.0 and 5.0, allows remote attackers to cause a denial of service by accessing the script without a particular argument, aka the "Absent D…

2000-07-12
Medium

CVE-2000-0643

Buffer overflow in WebActive HTTP Server 1.00 allows remote attackers to cause a denial of service via a long URL.

2000-07-11
Medium

CVE-2000-0648

WFTPD and WFTPD Pro 2.41 allows local users to cause a denial of service by executing the RENAME TO (RNTO) command before a RENAME FROM (RNFR) command.

Medium

CVE-2000-0669

Novell NetWare 5.0 allows remote attackers to cause a denial of service by flooding port 40193 with random data.

2000-07-10
Medium

CVE-2000-0661

WircSrv IRC Server 5.07s allows remote attackers to cause a denial of service via a long string to the server port.

2000-07-07
Medium

CVE-2000-0574

FTP servers such as OpenBSD ftpd, NetBSD ftpd, ProFTPd and Opieftpd do not properly cleanse untrusted format strings that are used in the setproctitle function (sometimes called by set_proc_title), w…

2000-07-05
Medium

CVE-2000-0571

LocalWEB HTTP server 1.2.0 allows remote attackers to cause a denial of service via a long GET request.

Medium

CVE-2000-0576

Oracle Web Listener for AIX versions 4.0.7.0.0 and 4.0.8.1.0 allows remote attackers to cause a denial of service via a malformed URL.

2000-07-04
Medium

CVE-2000-0594

BitchX IRC client does not properly cleanse an untrusted format string, which allows remote attackers to cause a denial of service via an invite to a channel whose name includes special formatting ch…

2000-06-30
Medium

CVE-2000-0569

Sybergen Sygate allows remote attackers to cause a denial of service by sending a malformed DNS UDP packet to its internal interface.

Medium

CVE-2000-0580

Windows 2000 Server allows remote attackers to cause a denial of service by sending a continuous stream of binary zeros to various TCP and UDP ports, which significantly increases the CPU utilization.

Medium

CVE-2000-0581

Windows 2000 Telnet Server allows remote attackers to cause a denial of service by sending a continuous stream of binary zeros, which causes the server to crash.

Medium

CVE-2000-0582

Check Point FireWall-1 4.0 and 4.1 allows remote attackers to cause a denial of service by sending a stream of invalid commands (such as binary zeros) to the SMTP Security Server proxy.

Medium

CVE-2000-0583

vchkpw program in vpopmail before version 4.8 does not properly cleanse an untrusted format string used in a call to syslog, which allows remote attackers to cause a denial of service via a USER or P…

2000-06-29
Critical

CVE-2000-0586

Buffer overflow in Dalnet IRC server 4.6.5 allows remote attackers to cause a denial of service or execute arbitrary commands via the SUMMON command.

2000-06-27
Medium

CVE-2000-0570

FirstClass Internet Services server 5.770, and other versions before 6.1, allows remote attackers to cause a denial of service by sending an email with a long To: mail header.

Medium

CVE-2000-0593

WinProxy 2.0 and 2.0.1 allows remote attackers to cause a denial of service by sending an HTTP GET request without listing an HTTP version number.

2000-06-26
High

CVE-2000-0600

Netscape Enterprise Server in NetWare 5.1 allows remote attackers to cause a denial of service or execute arbitrary commands via a malformed URL.

2000-06-25
Medium

CVE-2000-0601

LeafChat 1.7 IRC client allows a remote IRC server to cause a denial of service by rapidly sending a large amount of error messages.

2000-06-23
Medium

CVE-2000-0611

The default configuration of NetWin dMailWeb and cwMail trusts all POP servers, which allows attackers to bypass normal authentication and cause a denial of service.

2000-06-21
Medium

CVE-2000-0510

CUPS (Common Unix Printing System) 1.04 and earlier allows remote attackers to cause a denial of service via a malformed IPP request.

Medium

CVE-2000-0511

CUPS (Common Unix Printing System) 1.04 and earlier allows remote attackers to cause a denial of service via a CGI POST request.

Medium

CVE-2000-0513

CUPS (Common Unix Printing System) 1.04 and earlier allows remote attackers to cause a denial of service by authenticating with a user name that does not exist or does not have a shadow password.

Medium

CVE-2000-0608

NetWin dMailWeb and cwMail 2.6i and earlier allows remote attackers to cause a denial of service via a long POP parameter (pophost).

Medium

CVE-2000-0609

NetWin dMailWeb and cwMail 2.6g and earlier allows remote attackers to cause a denial of service via a long username parameter.

2000-06-19
Medium

CVE-2000-0504

libICE in XFree86 allows remote attackers to cause a denial of service by specifying a large value which is not properly checked by the SKIP_STRING macro.

Medium

CVE-2000-0529

Net Tools PKI Server allows remote attackers to cause a denial of service via a long HTTP request.

Medium

CVE-2000-0620

libX11 X library allows remote attackers to cause a denial of service via a resource mask of 0, which causes libX11 to go into an infinite loop.

2000-06-16
Medium

CVE-2000-0479

Dragon FTP server allows remote attackers to cause a denial of service via a long USER command.

Medium

CVE-2000-0480

Dragon telnet server allows remote attackers to cause a denial of service via a long username.

Low

CVE-2000-0501

Race condition in MDaemon 2.8.5.0 POP server allows local users to cause a denial of service by entering a UIDL command and quickly exiting the server.