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...
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
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 Medium
AV: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
| Package | Affected | Fixed |
|---|---|---|
squidMageia: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.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | Squid 3.3.5 - Denial of Service (PoC) | 2013-07-16 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE 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.