UpHeron
All vulnerabilities

Servers and applications

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.

Severity
Medium 5.0
Published
28 Jul 2009
Last changed
16 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
23% in the next 30 daysHigher than 97% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
Memory buffer errors (CWE-119)
Attack
Over the network · No login needed
Attacker can
Slow it down
CVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:P
Sources
NVD

Affected software

SoftwareAffected versions
SquidServers and applications · cpe:a:squid-cache:squid
  • Version 3.1.0.4
  • Version 3.1.0.3
  • Version 3.1.0.2
  • Version 3.1.0.1
All 8 release lines
  • Version 3.0-rc1
  • Version 3.0-rc4
  • Version 3.0
  • Version 3.1
  • Version 3.1.0.1
  • Version 3.1.0.2
  • Version 3.1.0.3
  • Version 3.1.0.4

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2009-2621
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2009-2621