PT-2020-5764 · Squid+8 · Squid+9
Clément Berthaux
+1
·
Published
2020-04-23
·
Updated
2024-06-15
·
CVE-2020-11945
CVSS v3.1
9.8
Critical
| Vector | AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions:
Squid versions prior to 5.0.2
Description:
The issue is related to an integer overflow in the nonce storage mechanism of Squid's digest authentication proxy server. This can allow a remote attacker to gain access to confidential data, compromise its integrity, and cause a denial of service. The attacker can replay a sniffed Digest Authentication nonce to access forbidden resources. Remote code execution may occur if the pooled token credentials are freed instead of being replayed as valid credentials.
Recommendations:
For Squid versions prior to 5.0.2, update to version 5.0.2 or later to resolve the issue.
As a temporary workaround, consider restricting access to the digest authentication mechanism until a patch is available.
Avoid using the
nonce value in the affected authentication process until the issue is resolved.Fix
RCE
Integer Overflow
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Almalinux
Centos
Linuxmint
Red Hat
Rocky Linux
Squid
Squid Cache
Suse
Ubuntu