CVE-2016-2572

squid: wrong error handling for malformed HTTP responses

Severity Score

7.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

http.cc in Squid 4.x before 4.0.7 relies on the HTTP status code after a response-parsing failure, which allows remote HTTP servers to cause a denial of service (assertion failure and daemon exit) via a malformed response.

http.cc en Squid 4.x en versiones anteriores a 4.0.7 confía en el código de estado HTTP después de un fallo de respuesta de análisis, lo que permite a servidores HTTP remotos provocar una denegación de servicio (fallo de aserción y salida de demonio) a través de una respuesta mal formada.

It was found that squid did not properly handle errors when failing to parse an HTTP response, possibly leading to an assertion failure. A malicious HTTP server could use this flaw to crash squid using a specially crafted HTTP response.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-02-26 CVE Reserved
2016-02-27 CVE Published
2024-02-22 EPSS Updated
2024-08-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation
CWE-228: Improper Handling of Syntactically Invalid Structure

CAPEC

References (11)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2016/02/26/2	Mailing List
http://www.securitytracker.com/id/1035101	Vdb Entry

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html	2018-01-05
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html	2018-01-05
http://lists.opensuse.org/opensuse-updates/2016-08/msg00069.html	2018-01-05
http://rhn.redhat.com/errata/RHSA-2016-2600.html	2018-01-05
http://www.squid-cache.org/Advisories/SQUID-2016_2.txt	2018-01-05
http://www.squid-cache.org/Versions/v4/changesets/squid-4-14548.patch	2018-01-05
https://security.gentoo.org/glsa/201607-01	2018-01-05
https://access.redhat.com/security/cve/CVE-2016-2572	2016-11-03
https://bugzilla.redhat.com/show_bug.cgi?id=1312262	2016-11-03

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Squid-cache Search vendor "Squid-cache"		Squid Search vendor "Squid-cache" for product "Squid"				4.0.1 Search vendor "Squid-cache" for product "Squid" and version "4.0.1"		-		Affected
Squid-cache Search vendor "Squid-cache"		Squid Search vendor "Squid-cache" for product "Squid"				4.0.2 Search vendor "Squid-cache" for product "Squid" and version "4.0.2"		-		Affected
Squid-cache Search vendor "Squid-cache"		Squid Search vendor "Squid-cache" for product "Squid"				4.0.3 Search vendor "Squid-cache" for product "Squid" and version "4.0.3"		-		Affected
Squid-cache Search vendor "Squid-cache"		Squid Search vendor "Squid-cache" for product "Squid"				4.0.4 Search vendor "Squid-cache" for product "Squid" and version "4.0.4"		-		Affected
Squid-cache Search vendor "Squid-cache"		Squid Search vendor "Squid-cache" for product "Squid"				4.0.5 Search vendor "Squid-cache" for product "Squid" and version "4.0.5"		-		Affected
Squid-cache Search vendor "Squid-cache"		Squid Search vendor "Squid-cache" for product "Squid"				4.0.6 Search vendor "Squid-cache" for product "Squid" and version "4.0.6"		-		Affected