UpHeron
All vulnerabilities

Servers and applications

CVE-2013-4123

client_side_request.cc in Squid 3.2.x before 3.2.13 and 3.3.x before 3.3.8 allows remote attackers to cause a denial of service via a crafted port number in a HTTP Host header.

Severity
Medium 5.0
Published
16 Sept 2013
Last changed
16 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
80% 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 3.3.7
  • Version 3.3.6
  • Version 3.3.5
  • Version 3.3.4
All 41 release lines
  • Version 3.2.0.1
  • Version 3.2.0.2
  • Version 3.2.0.3
  • Version 3.2.0.4
  • Version 3.2.0.5
  • Version 3.2.0.6
  • Version 3.2.0.7
  • Version 3.2.0.8
  • Version 3.2.0.9
  • Version 3.2.0.10
  • Version 3.2.0.11
  • Version 3.2.0.12
  • Version 3.2.0.13
  • Version 3.2.0.14
  • Version 3.2.0.15
  • Version 3.2.0.16
  • Version 3.2.0.17
  • Version 3.2.0.18
  • Version 3.2.0.19
  • Version 3.2.1
  • Version 3.2.2
  • Version 3.2.3
  • Version 3.2.4
  • Version 3.2.5
  • Version 3.2.6
  • Version 3.2.7
  • Version 3.2.8
  • Version 3.2.9
  • Version 3.2.10
  • Version 3.2.11
  • Version 3.2.12
  • Version 3.3.0
  • Version 3.3.0.2
  • Version 3.3.0.3
  • Version 3.3.1
  • Version 3.3.2
  • Version 3.3.3
  • Version 3.3.4
  • Version 3.3.5
  • Version 3.3.6
  • Version 3.3.7

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2013-4123
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2013-4123