UpHeron
All vulnerabilities

Servers and applications

CVE-2009-2622

Squid 3.0 through 3.0.STABLE16 and 3.1 through 3.1.0.11 allows remote attackers to cause a denial of service via malformed requests including (1) "missing or mismatched protocol identifier," (2) missing or negative status value," (3) "missing version," or (4) "missing or invalid status number," related to (a) HttpMsg.cc and (b) HttpReply.cc.

Severity
Medium 5.0
Published
28 Jul 2009
Last changed
16 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
57% in the next 30 daysHigher than 99% 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 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-2009-2622
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2009-2622