← Vulnerability feed

Vulnerability record · CVE-2010-0639 · published 15 February 2010

CVE-2010-0639: Squid-cache squid vulnerability

Squid Cache · Squid

The htcpHandleTstRequest function in htcp.c in Squid 2.x before 2.6.STABLE24 and 2.7 before 2.7.STABLE8, and htcp.cc in 3.0 before 3.0.STABLE24, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via crafted packets to the HTCP port.

5.0 CVSS 2.0 Medium EPSS 31% · top 1.8%
5.0CVSS 2.0 base score
31%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
24References
16 Jun 2026Last modified by NVD

Description

The htcpHandleTstRequest function in htcp.c in Squid 2.x before 2.6.STABLE24 and 2.7 before 2.7.STABLE8, and htcp.cc in 3.0 before 3.0.STABLE24, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via crafted packets to the HTCP port.

AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://bugs.squid-cache.org/show_bug.cgi?id=2858
http://lists.fedoraproject.org/pipermail/package-announce/2010-February/035961.html
http://lists.fedoraproject.org/pipermail/package-announce/2010-March/037159.html
http://osvdb.org/62297
http://secunia.com/advisories/38812 Vendor Advisory
http://www.securityfocus.com/bid/38212
http://www.securitytracker.com/id?1023587
http://www.squid-cache.org/Advisories/SQUID-2010_2.txt Vendor Advisory
http://www.squid-cache.org/Versions/v2/2.7/changesets/12600.patch Patch
http://www.squid-cache.org/Versions/v3/3.0/changesets/3.0-ADV-2010_2.patch Patch
http://www.vupen.com/english/advisories/2010/0371 Vendor Advisory
http://www.vupen.com/english/advisories/2010/0603 Vendor Advisory
http://bugs.squid-cache.org/show_bug.cgi?id=2858
http://lists.fedoraproject.org/pipermail/package-announce/2010-February/035961.html
http://lists.fedoraproject.org/pipermail/package-announce/2010-March/037159.html
http://osvdb.org/62297
http://secunia.com/advisories/38812 Vendor Advisory
http://www.securityfocus.com/bid/38212
http://www.securitytracker.com/id?1023587
http://www.squid-cache.org/Advisories/SQUID-2010_2.txt Vendor Advisory
http://www.squid-cache.org/Versions/v2/2.7/changesets/12600.patch Patch
http://www.squid-cache.org/Versions/v3/3.0/changesets/3.0-ADV-2010_2.patch Patch
http://www.vupen.com/english/advisories/2010/0371 Vendor Advisory
http://www.vupen.com/english/advisories/2010/0603 Vendor Advisory

Track CVE-2010-0639 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2025-54574Squid-cache squid heap-based buffer overflow vulnerabilitySquid is a caching proxy for the Web. In versions 6.3 and below, Squid is vulnerable to a heap buffer overflow and possible remote code execution att…EPSS 23%9.8CVE-2020-11945Squid-cache squid integer overflow vulnerabilityAn issue was discovered in Squid before 5.0.2. A remote attacker can replay a sniffed Digest Authentication nonce to gain access to resources that ar…EPSS 27%9.8CVE-2019-12519Squid-cache squid out-of-bounds write vulnerabilityAn issue was discovered in Squid through 4.7. When handling the tag esi:when when ESI is enabled, Squid calls ESIExpression::Evaluate. This function …EPSS 6.7%9.8CVE-2019-12524Squid-cache squid missing authentication for critical function vulnerabilityAn issue was discovered in Squid through 4.7. When handling requests from users, Squid checks its rules to see if the request should be denied. Squid…EPSS 4.3%9.8CVE-2019-12526Squid-cache squid out-of-bounds write vulnerabilityAn issue was discovered in Squid before 4.9. URN response handling in Squid suffers from a heap-based buffer overflow. When receiving data from a rem…EPSS 20%9.8CVE-2019-12525Squid-cache squid out-of-bounds write vulnerabilityAn issue was discovered in Squid 3.3.9 through 3.5.28 and 4.x through 4.7. When Squid is configured to use Digest authentication, it parses the heade…EPSS 24%9.2CVE-2026-33526Squid-cache squid use after free vulnerabilitySquid is a caching proxy for the Web. Prior to version 7.5, due to heap Use-After-Free, Squid is vulnerable to Denial of Service when handling ICP tr…EPSS 13%9.1CVE-2019-12523Squid-cache squid vulnerabilityAn issue was discovered in Squid before 4.9. When handling a URN request, a corresponding HTTP request is made. This HTTP request doesn't go through …EPSS 4.3%

Source: NIST National Vulnerability Database (record CVE-2010-0639), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.