Drop everything.
Critical CVEs that are confirmed exploited or very likely to be. Newest first.
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CVE-2005-1099
Multiple buffer overflows in the HandleChild function in server.c in Greylisting daemon (GLD) 1.3 and 1.4, when GLD is listening on a network interface, allow remote attackers to execute arbitrary code.
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CVE-2004-0964
Buffer overflow in Zinf 2.2.1 on Windows, and other older versions for Linux, allows remote attackers or local users to execute arbitrary code via certain values in a .pls file.
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CVE-2004-0897
The Indexing Service for Microsoft Windows XP and Server 2003 does not properly validate the length of a message, which allows remote attackers to execute arbitrary code via a buffer overflow attack.
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CVE-2004-1080
The WINS service (wins.exe) on Microsoft Windows NT Server 4.0, Windows 2000 Server, and Windows Server 2003 allows remote attackers to write to arbitrary memory locations and possibly execute arbitrary code via a modified memory pointer in a WINS replication packet to TCP port 42, aka the "Association Context Vulnerability."
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CVE-2004-1211
Multiple buffer overflows in the IMAP service in Mercury/32 4.01a allow remote authenticated users to cause a denial of service (application crash) and possibly execute arbitrary code via long arguments to the (1) EXAMINE, (2) SUBSCRIBE, (3) STATUS, (4) APPEND, (5) CHECK, (6) CLOSE, (7) EXPUNGE, (8) FETCH, (9) RENAME, (10) DELETE, (11) LIST, (12) SEARCH, (13) CREATE, or (14) UNSUBSCRIBE commands.
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CVE-2004-1812
Multiple stack-based buffer overflows in Agent Common Services (1) cam.exe and (2) awservices.exe in Unicenter TNG 2.4 allow remote attackers to execute arbitrary code.
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CVE-2004-0326
Buffer overflow in the web proxy for GateKeeper Pro 4.7 allows remote attackers to execute arbitrary code via a long GET request.
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CVE-2004-0330
Buffer overflow in Serv-U ftp before 5.0.0.4 allows remote authenticated users to execute arbitrary code via a long time zone argument to the MDTM command.
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CVE-2004-0597
Multiple buffer overflows in libpng 1.2.5 and earlier, as used in multiple products, allow remote attackers to execute arbitrary code via malformed PNG images in which (1) the png_handle_tRNS function does not properly validate the length of transparency chunk (tRNS) data, or the (2) png_handle_sBIT or (3) png_handle_hIST functions do not perform sufficient bounds checking.
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CVE-2004-0636
Buffer overflow in the goaway function in the aim:goaway URI handler for AOL Instant Messenger (AIM) 5.5, including 5.5.3595, allows remote attackers to execute arbitrary code via a long Away message.
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CVE-2004-0209
Unknown vulnerability in the Graphics Rendering Engine processes of Microsoft Windows 2000, Windows XP, and Windows Server 2003 allows remote attackers to execute arbitrary code via (1) Windows Metafile (WMF) or (2) Enhanced Metafile (EMF) image formats that involve "an unchecked buffer."
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CVE-2004-0216
Integer overflow in the Install Engine (inseng.dll) for Internet Explorer 5.01, 5.5, and 6 allows remote attackers to execute arbitrary code via a malicious website or HTML email with a long .CAB file name, which triggers the integer overflow when calculating a buffer length and leads to a heap-based buffer overflow.
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CVE-2004-0574
The Network News Transfer Protocol (NNTP) component of Microsoft Windows NT Server 4.0, Windows 2000 Server, Windows Server 2003, Exchange 2000 Server, and Exchange Server 2003 allows remote attackers to execute arbitrary code via XPAT patterns, possibly related to improper length validation and an "unchecked buffer," leading to off-by-one and heap-based buffer overflows.
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CVE-2003-0819
Buffer overflow in the H.323 filter of Microsoft Internet Security and Acceleration Server 2000 allows remote attackers to execute arbitrary code in the Microsoft Firewall Service via certain H.323 traffic, as demonstrated by the NISCC/OUSPG PROTOS test suite for the H.225 protocol.
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CVE-2003-1339
Stack-based buffer overflow in eZnet.exe, as used in eZ (a) eZphotoshare, (b) eZmeeting, (c) eZnetwork, and (d) eZshare allows remote attackers to cause a denial of service (crash) or execute arbitrary code, as demonstrated via (1) a long GET request and (2) a long operation or autologin parameter to SwEzModule.dll.
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CVE-2003-0545
Double free vulnerability in OpenSSL 0.9.7 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via an SSL client certificate with a certain invalid ASN.1 encoding.
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CVE-2003-0831
ProFTPD 1.2.7 through 1.2.9rc2 does not properly translate newline characters when transferring files in ASCII mode, which allows remote attackers to execute arbitrary code via a buffer overflow using certain files.
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CVE-2002-1337
Buffer overflow in Sendmail 5.79 to 8.12.7 allows remote attackers to execute arbitrary code via certain formatted address fields, related to sender and recipient header comments as processed by the crackaddr function of headers.c.
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CVE-2002-2268
Buffer overflow in Webster HTTP Server allows remote attackers to execute arbitrary code via a long URL.
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CVE-2002-0391
Integer overflow in xdr_array function in RPC servers for operating systems that use libc, glibc, or other code based on SunRPC including dietlibc, allows remote attackers to execute arbitrary code by passing a large number of arguments to xdr_array through RPC services such as rpc.cmsd and dmispd.
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CVE-2001-0803
Buffer overflow in the client connection routine of libDtSvc.so.1 in CDE Subprocess Control Service (dtspcd) allows remote attackers to execute arbitrary commands.
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CVE-2001-0779
Buffer overflow in rpc.yppasswdd (yppasswd server) in Solaris 2.6, 7 and 8 allows remote attackers to gain root access via a long username.
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CVE-2001-0499
Buffer overflow in Transparent Network Substrate (TNS) Listener in Oracle 8i 8.1.7 and earlier allows remote attackers to gain privileges via a long argument to the commands (1) STATUS, (2) PING, (3) SERVICES, (4) TRC_FILE, (5) SAVE_CONFIG, or (6) RELOAD.
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CVE-2001-0241
Buffer overflow in Internet Printing ISAPI extension in Windows 2000 allows remote attackers to gain root privileges via a long print request that is passed to the extension through IIS 5.0.
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CVE-2001-0168
Buffer overflow in AT&T WinVNC (Virtual Network Computing) server 3.3.3r7 and earlier allows remote attackers to execute arbitrary commands via a long HTTP GET request when the DebugLevel registry key is greater than 0.
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CVE-2001-0236
Buffer overflow in Solaris snmpXdmid SNMP to DMI mapper daemon allows remote attackers to execute arbitrary commands via a long "indication" event.
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CVE-2000-1089
Buffer overflow in Microsoft Phone Book Service allows local users to execute arbitrary commands, aka the "Phone Book Service Buffer Overflow" vulnerability.
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CVE-1999-0874
Buffer overflow in IIS 4.0 allows remote attackers to cause a denial of service via a malformed request for files with .HTR, .IDC, or .STM extensions.
A CVE is listed as major when it is critical (CVSS 9.0 or higher) and either confirmed exploited in the wild with a real chance of more, or very likely to be exploited (EPSS 40% or more).