PT-2021-5367 · Squid+9 · Squid+10
Lyu
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Published
2021-03-09
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Updated
2024-06-15
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CVE-2021-28116
CVSS v2.0
6.4
Medium
| Vector | AV:N/AC:L/Au:N/C:P/I:P/A:N |
Name of the Vulnerable Software and Affected Versions
Squid versions 4.14 and 5.x through 5.0.5
Description
The issue is related to an out-of-bounds read in WCCP protocol data, which can lead to information disclosure. This can be leveraged as part of a chain for remote code execution. The vulnerability is associated with a buffer read beyond its boundaries, allowing a remote attacker to gain access to confidential information by substituting the list of known Squid WCCP routers and redirecting traffic to a controlled router.
Recommendations
For Squid versions 4.14 and 5.x through 5.0.5, consider disabling the WCCP protocol as a temporary workaround until a patch is available. Restrict access to the WCCP protocol data to minimize the risk of exploitation. Avoid using configurations that allow information disclosure through the WCCP protocol until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this vulnerability.
RCE
Out of bounds Read
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Almalinux
Astra Linux
Centos
Linuxmint
Red Hat
Rocky Linux
Squid
Squid Cache
Suse
Ubuntu