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.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 80.5%, higher than 100% of all known CVEs. Patch or mitigate before the next change window.
Description
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.
- CVSS 2.0
- 5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
- EPSS
- 80.45% probability · 100th percentile
- Public exploits
- 1 in Exploit-DB · verified · first 16 July 2013
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- squid-cache/squid · opensuse/opensuse
- Source
- secalert@redhat.com
EPSS 80.5% since 4 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://lists.opensuse.org/opensuse-updates/2013-09/msg00024.html
- http://secunia.com/advisories/54142Vendor Advisory
- http://secunia.com/advisories/54834
- http://www.squid-cache.org/Advisories/SQUID-2013_3.txtVendor Advisory
- http://www.squid-cache.org/Versions/v3/3.2/changesets/squid-3.2-11826.patchPatch
- http://www.squid-cache.org/Versions/v3/3.3/changesets/squid-3.3-12591.patch
- http://lists.opensuse.org/opensuse-updates/2013-09/msg00024.html
- http://secunia.com/advisories/54142Vendor Advisory
- http://secunia.com/advisories/54834
- http://www.squid-cache.org/Advisories/SQUID-2013_3.txtVendor Advisory
- http://www.squid-cache.org/Versions/v3/3.2/changesets/squid-3.2-11826.patchPatch
- http://www.squid-cache.org/Versions/v3/3.3/changesets/squid-3.3-12591.patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.