CVE-2009-2621
CVE-2009-2621 is a medium-severity vulnerability in Squid-cache Squid with a CVSS 2.0 base score of 5.0. Its EPSS exploit-prediction score of 23% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-119.
Key facts
- Severity: Medium (CVSS 2.0 base score 5.0)
- EPSS exploit prediction: 23% (97th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-119
- Affected product: Squid-cache Squid
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is 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.
- How severe is CVE-2009-2621?
- CVE-2009-2621 has a CVSS 2.0 base score of 5.0, rated medium severity.
- Is CVE-2009-2621 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 23% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2009-2621?
- CVE-2009-2621 primarily affects Squid-cache Squid. In total, 29 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2009-2621?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2009-2621 published?
- CVE-2009-2621 was published on 2009-07-28 and last updated on 2026-06-16.
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
Affected products (29)
- cpe:2.3:a:squid-cache:squid:3.0:*:pre1:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:3.0:*:pre2:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:3.0:*:pre3:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:3.0:*:pre4:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:3.0:*:pre5:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:3.0:*:pre6:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:3.0:*:pre7:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:3.0:*:stable1:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:3.0:*:stable10:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:3.0:*:stable11:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:3.0:*:stable12:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:3.0:*:stable13:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:3.0:*:stable14:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:3.0:*:stable15:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:3.0:*:stable2:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:3.0:*:stable3:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:3.0:*:stable4:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:3.0:*:stable5:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:3.0:*:stable6:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:3.0:*:stable7:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:3.0:*:stable8:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:3.0:*:stable9:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:3.0:rc1:stable11:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:3.0:rc4:*:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:3.1:*:*:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:3.1.0.1:*:*:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:3.1.0.2:*:*:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:3.1.0.3:*:*:*:*:*:*:*
- cpe:2.3:a:squid-cache:squid:3.1.0.4:*:*:*:*:*:*:*
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