CVE-2021-28116
First published: Tue Mar 09 2021(Updated: )
Squid through 4.14 and 5.x through 5.0.5, in some configurations, allows information disclosure because of an out-of-bounds read in WCCP protocol data. This can be leveraged as part of a chain for remote code execution as nobody.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/squid | 4.6-1+deb10u7 4.6-1+deb10u8 4.13-10+deb11u2 5.7-2 6.3-1 | |
| Squid-Cache Squid | <=4.14 | |
| Squid-Cache Squid | >=5.0<=5.0.5 | |
| Fedoraproject Fedora | =33 | |
| Fedoraproject Fedora | =34 | |
| Debian Debian Linux | =10.0 | |
| Debian Debian Linux | =11.0 |
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Reference Links
- https://www.zerodayinitiative.com/advisories/ZDI-CAN-11610/
- https://bugs.squid-cache.org/show_bug.cgi?id=5131
- https://www.openwall.com/lists/oss-security/2021/10/04/1
- http://www.squid-cache.org/Versions/v4/changesets/SQUID-2020_12.patch
- http://www.squid-cache.org/Versions/v5/changesets/squid-5-7a73a54cefff6bb83c03de219a73276e42d183d0.patch
- https://security-tracker.debian.org/tracker/CVE-2021-28116
- http://www.openwall.com/lists/oss-security/2021/10/04/1
- http://www.squid-cache.org/Versions/
- https://github.com/squid-cache/squid/security/advisories/GHSA-rgf3-9v3p-qp82
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LSQ3U54ZCNXR44QRPW3AV2VCS6K3TKCF/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/T4EPIWUZDJAXADDHVOPKRBTQHPBR6H66/
- https://security.gentoo.org/glsa/202105-14
- https://www.debian.org/security/2022/dsa-5171
- https://www.zerodayinitiative.com/advisories/ZDI-21-157/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LSQ3U54ZCNXR44QRPW3AV2VCS6K3TKCF/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T4EPIWUZDJAXADDHVOPKRBTQHPBR6H66/
Frequently Asked Questions
What is CVE-2021-28116?
CVE-2021-28116 is a vulnerability in Squid versions 4.14 and 5.x through 5.0.5 that allows information disclosure through an out-of-bounds read in the WCCP protocol data.
How severe is CVE-2021-28116?
CVE-2021-28116 has a severity rating of 5.3, which is considered medium.
How can CVE-2021-28116 be exploited?
CVE-2021-28116 can be leveraged as part of a chain for remote code execution.
What software is affected by CVE-2021-28116?
Squid versions 4.6-1+deb10u7, 4.6-1+deb10u8, 4.13-10+deb11u2, 5.7-2, and 6.3-1 are affected, as well as Squid-Cache Squid versions up to 4.14 and versions up to 5.0.5.
How do I mitigate CVE-2021-28116?
To mitigate CVE-2021-28116, it is recommended to upgrade to a fixed version of Squid or follow the recommended remedies provided by the vendor.
- collector/security-tracker-debian
- collector/nvd-index
- agent/weakness
- agent/description
- agent/type
- agent/references
- agent/severity
- agent/author
- agent/event
- agent/last-modified-date
- agent/softwarecombine
- agent/first-publish-date
- agent/tags
- collector/mitre-cve
- source/MITRE
- package-manager/debian
- vendor/squid-cache
- canonical/squid-cache squid
- version/squid-cache squid/4.14
- version/squid-cache squid/5.0
- version/squid-cache squid/5.0.5
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/33
- version/fedoraproject fedora/34
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/10.0
- version/debian debian linux/11.0