Public Date:
1730535: CVE-2019-12525 squid: parsing of header Proxy-Authentication leads to memory corruption

The MITRE CVE dictionary describes this issue as:

An issue was discovered in Squid 3.3.9 through 3.5.28 and 4.x through 4.7. When Squid is configured to use Digest authentication, it parses the header Proxy-Authorization. It searches for certain tokens such as domain, uri, and qop. Squid checks if this token's value starts with a quote and ends with one. If so, it performs a memcpy of its length minus 2. Squid never checks whether the value is just a single quote (which would satisfy its requirements), leading to a memcpy of its length minus 1.

Find out more about CVE-2019-12525 from the MITRE CVE dictionary dictionary and NIST NVD.


Red Hat Enterprise Linux 6:
This vulnerability has been rated as having a security impact of Moderate. After evaluation and in accordance with the criteria noted in the product support life cycle, there are no plans to address this issue in an upcoming release. Please contact Red Hat Support for further information.

Red Hat Enterprise Linux 7:
This vulnerability is currently targeted to be addressed in an upcoming release.

Red Hat Enterprise Linux 8:
This vulnerability is currently targeted to be addressed in an upcoming release.

CVSS v3 metrics

NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.

CVSS3 Base Score 4.3
CVSS3 Base Metrics CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack Vector Adjacent Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity Impact None
Availability Impact Low

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 8 squid:4/squid Affected
Red Hat Enterprise Linux 7 squid Affected
Red Hat Enterprise Linux 6 squid34 Out of support scope
Red Hat Enterprise Linux 6 squid Not affected
Red Hat Enterprise Linux 5 squid Not affected
Unless explicitly stated as not affected, all previous versions of packages in any minor update stream of a product listed here should be assumed vulnerable, although may not have been subject to full analysis.


Remove 'auth_param digest ...' configuration settings from squid.conf.

External References

Last Modified

CVE description copyright © 2017, The MITRE Corporation