UpHeron
All vulnerabilities

Servers and applications

CVE-2009-2855

The strListGetItem function in src/HttpHeaderTools.c in Squid 2.7 allows remote attackers to cause a denial of service via a crafted auth header with certain comma delimiters that trigger an infinite loop of calls to the strcspn function.

Severity
Medium 5.0
Published
18 Aug 2009
Last changed
16 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
34% in the next 30 daysHigher than 98% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
Improper input validation (CWE-20)
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 2.7
  • Version 2.7-stable3
  • Version 2.7-stable4

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2009-2855
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2009-2855