medium
6.5
CWE
190
Advisory Published
Updated

CVE-2021-31807: Integer Overflow

First published: Tue Jun 08 2021(Updated: )

An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. An integer overflow problem allows a remote server to achieve Denial of Service when delivering responses to HTTP Range requests. The issue trigger is a header that can be expected to exist in HTTP traffic without any malicious intent.

Credit: cve@mitre.org cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Squid-Cache Squid>=3.0<4.15
Squid-Cache Squid>=5.0<5.0.6
Squid-Cache Squid=2.5.stable2
Squid-Cache Squid=2.5.stable3
Squid-Cache Squid=2.5.stable4
Squid-Cache Squid=2.5.stable5
Squid-Cache Squid=2.5.stable6
Squid-Cache Squid=2.5.stable7
Squid-Cache Squid=2.5.stable8
Squid-Cache Squid=2.5.stable9
Squid-Cache Squid=2.5.stable10
Squid-Cache Squid=2.5.stable11
Squid-Cache Squid=2.5.stable12
Squid-Cache Squid=2.5.stable13
Squid-Cache Squid=2.5.stable14
Squid-Cache Squid=2.6
Squid-Cache Squid=2.7
Squid-Cache Squid=2.7-stable2
Squid-Cache Squid=2.7-stable3
Squid-Cache Squid=2.7-stable4
Squid-Cache Squid=2.7-stable5
Squid-Cache Squid=2.7-stable6
Squid-Cache Squid=2.7-stable7
Squid-Cache Squid=2.7-stable8
Squid-Cache Squid=2.7-stable9
Fedoraproject Fedora=33
Fedoraproject Fedora=34
NetApp Cloud Manager
debian/squid
4.13-10+deb11u3
5.7-2+deb12u2
6.12-1

Remedy

http://www.squid-cache.org/Versions/v4/changesets/squid-4-e7cf864f938f24eea8af0692c04d16790983c823.patch

Remedy

https://github.com/squid-cache/squid/commit/e7cf864f938f24eea8af0692c04d16790983c823

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Reference Links

Frequently Asked Questions

  • What is CVE-2021-31807?

    CVE-2021-31807 is a vulnerability discovered in Squid before 4.15 and 5.x before 5.0.6 that allows a remote server to achieve Denial of Service when delivering responses to HTTP Range requests.

  • How does CVE-2021-31807 affect Squid?

    CVE-2021-31807 affects Squid versions before 4.15 and 5.x before 5.0.6, potentially leading to denial of service.

  • What is the severity of CVE-2021-31807?

    The severity of CVE-2021-31807 is medium, with a CVSS score of 6.5.

  • How can I fix CVE-2021-31807?

    To fix CVE-2021-31807, upgrade to Squid version 4.15 or 5.0.6 or later.

  • Where can I find more information about CVE-2021-31807?

    You can find more information about CVE-2021-31807 at the following references: [reference1](http://seclists.org/fulldisclosure/2023/Oct/14), [reference2](http://www.openwall.com/lists/oss-security/2023/10/11/3), [reference3](http://www.squid-cache.org/Versions/v4/changesets/squid-4-e7cf864f938f24eea8af0692c04d16790983c823.patch)

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