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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...

5.0 MediumPublic exploit

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.

Exploit likelihood

80.5%Up 71.2 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 5.0

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.

Record
CVE-2013-4123
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness
CWE-20
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2013-4123
Updated
2026-11-02
EUVDEUVD-2013-4051 No score

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.

Record
EUVD-2013-4051
Updated
2026-11-03
GitHub AdvisoriesGHSA-gpv8-rwm7-v9hg No score

client_side_request.cc in Squid 3.2.x before 3.2.13 and 3.3.x before 3.3.8 allows remote...

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.

Record
GHSA-gpv8-rwm7-v9hg
Weakness
CWE-20
Updated
2026-11-02
OSVMGASA-2013-0228 No score

Updated squid packages fix security vulnerabilities

Due to incorrect data validation Squid is vulnerable to a buffer overflow attack when processing specially crafted HTTP requests. This problem allows any trusted client or client script who can generate HTTP requests to trigger a buffer overflow in Squid, resulting in a termination of the Squid service (CVE-2013-4115).

Due to incorrect data validation Squid is vulnerable to a denial of service attack when processing specially crafted HTTP requests. This problem allows any client who can generate HTTP requests to perform a denial of service attack on the Squid service (CVE-2013-4123).

Also, due to being renamed in Squid 3.2, the Squid external acl helpers for matching against IP addresses and LDAP groups were not selected to be built in the squid package for Mageia 3.

This has been corrected and these helpers are now included. Additionally, the helpers for eDirectory IP address lookups and matching LDAP groups using Kerberos credentials have also been included.

Record
MGASA-2013-0228
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
squid
Mageia:3
From an advisory covering 2 CVEs
before 3.2.10-1.4.mga3
3.2.10-1.4.mga3

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
SourceLinkDate
Exploit-DBSquid 3.3.5 - Denial of Service (PoC)2013-07-16

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, Exploit-DB, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2013-4123 is a medium vulnerability (CVSS 5.0) in Squid-cache Squid, published July 21, 2013. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 80.5%, the 99th percentile. No source names a fixed version.

References

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