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    CVE-2009-2621

    Squid 3.0 through 3.0.STABLE16 and 3.1 through 3.1.0.11 does not properly enforce "buffer limits and related bound checks," which allows remote attackers to cause a denial of service via (1) an incomplete request or (2) a request with a large header size, related to (a) HttpMsg.cc and (b) client_side.cc.

    Published:Jul 27, 2009
    Last Modified:Apr 23, 2026
    EPS:Jul 28, 2009
    EPSS Score:0.23562
    CVSS Score:5

    Affected Products

    Vendor
    Squid-cache
    Product
    Squid

    Exploits

    No exploit reference

    Related CVEs

    CVE-2026-50012 (CVSS 5.5) — Squid is a caching proxy for the Web. Prior to 7.6, due to an improper input validation bug in cache digest re…
    CVE-2026-47729 (CVSS 6.5) — Squid is a caching proxy for the Web. Prior to 7.6, due to an improper validation of syntactic correctness of …
    CVE-2026-33526 (CVSS 9.2) — Squid is a caching proxy for the Web. Prior to version 7.5, due to heap Use-After-Free, Squid is vulnerable to…
    CVE-2026-33515 (CVSS 6.9) — Squid is a caching proxy for the Web. Prior to version 7.5, due to improper input validation, Squid is vulnera…
    CVE-2026-32748 (CVSS 8.7) — Squid is a caching proxy for the Web. Prior to version 7.5, due to premature release of resource during expect…
    CVE-2025-62168 (CVSS 10) — Squid is a caching proxy for the Web. In Squid versions prior to 7.2, a failure to redact HTTP authentication …
    CVE-2025-59362 (CVSS 4) — Squid through 7.1 mishandles ASN.1 encoding of long SNMP OIDs. This occurs in asn_build_objid in lib/snmplib/a…
    CVE-2025-54574 (CVSS 9.3) — Squid is a caching proxy for the Web. In versions 6.3 and below, Squid is vulnerable to a heap buffer overflow…
    CVE-2024-45802 (CVSS 7.5) — Squid is an open source caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to Input Validati…
    CVE-2024-37894 (CVSS 6.3) — Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to an Out-of-bounds Write erro…

    References

    http://secunia.com/advisories/36007
    http://www.mandriva.com/security/advisories?name=MDVSA-2009:161
    http://www.mandriva.com/security/advisories?name=MDVSA-2009:178
    http://www.securityfocus.com/bid/35812
    http://www.securitytracker.com/id?1022607
    http://www.squid-cache.org/Advisories/SQUID-2009_2.txt
    http://www.squid-cache.org/Versions/v3/3.1/changesets/b9654.patch
    http://www.vupen.com/english/advisories/2009/2013
    http://secunia.com/advisories/36007
    http://www.mandriva.com/security/advisories?name=MDVSA-2009:161
    http://www.mandriva.com/security/advisories?name=MDVSA-2009:178
    http://www.securityfocus.com/bid/35812
    http://www.securitytracker.com/id?1022607
    http://www.squid-cache.org/Advisories/SQUID-2009_2.txt
    http://www.squid-cache.org/Versions/v3/3.1/changesets/b9654.patch
    http://www.vupen.com/english/advisories/2009/2013

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High