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…
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 23.0%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
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.
- CVSS 2.0
- 5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
- EPSS
- 23.05% probability · 98th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-119
- Affected
- squid-cache/squid
- Source
- cret@cert.org
EPSS 23.0% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
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.txtVendor Advisory
- http://www.squid-cache.org/Versions/v3/3.1/changesets/b9654.patchPatch
- 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.txtVendor Advisory
- http://www.squid-cache.org/Versions/v3/3.1/changesets/b9654.patchPatch
- http://www.vupen.com/english/advisories/2009/2013
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.