CVE-2020-8517: Input Validation
First published: Tue Feb 04 2020(Updated: )
An issue was discovered in Squid before 4.10. Due to incorrect input validation, the NTLM authentication credentials parser in ext_lm_group_acl may write to memory outside the credentials buffer. On systems with memory access protections, this can result in the helper process being terminated unexpectedly. This leads to the Squid process also terminating and a denial of service for all clients using the proxy.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Squid-Cache Squid | <4.10 | |
| openSUSE Leap | =15.1 | |
| Canonical Ubuntu Linux | =16.04 | |
| Canonical Ubuntu Linux | =18.04 | |
| Canonical Ubuntu Linux | =19.10 | |
| ubuntu/squid | <4.8-1ubuntu2.2 | 4.8-1ubuntu2.2 |
| ubuntu/squid | <4.9-2ubuntu4 | 4.9-2ubuntu4 |
| ubuntu/squid | <4.9-2ubuntu4 | 4.9-2ubuntu4 |
| ubuntu/squid | <4.9-2ubuntu4 | 4.9-2ubuntu4 |
| ubuntu/squid3 | <3.5.27-1ubuntu1.5 | 3.5.27-1ubuntu1.5 |
| ubuntu/squid3 | <3.5.12-1ubuntu7.10 | 3.5.12-1ubuntu7.10 |
| debian/squid | <=4.6-1+deb10u7<=4.6-1+deb10u10 | 4.13-10+deb11u2 4.13-10+deb11u3 5.7-2 5.7-2+deb12u1 6.6-1 6.9-1 |
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Reference Links
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00012.html
- http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00010.html
- http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00018.html
- http://www.squid-cache.org/Advisories/SQUID-2020_3.txt
- http://www.squid-cache.org/Versions/v4/changesets/squid-4-6982f1187a26557e582172965e266f544ea562a5.patch
- https://security.gentoo.org/glsa/202003-34
- https://security.netapp.com/advisory/ntap-20210304-0002/
- https://usn.ubuntu.com/4289-1/
- https://launchpad.net/bugs/cve/CVE-2020-8517
- http://www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-c62d2b43ad4962ea44aa0c5edb4cc99cb83a413d.patch
- https://security-tracker.debian.org/tracker/CVE-2020-8517
- https://ubuntu.com/security/notices/USN-4289-1
- https://www.cve.org/CVERecord?id=CVE-2020-8517
- https://nvd.nist.gov/vuln/detail/CVE-2020-8517
- https://ubuntu.com/security/CVE-2020-8517
Frequently Asked Questions
What is the CVE ID for this vulnerability?
The CVE ID for this vulnerability is CVE-2020-8517.
What is the severity of CVE-2020-8517?
The severity of CVE-2020-8517 is high with a score of 7.5.
Which software versions are affected by CVE-2020-8517?
Versions of Squid before 4.10 are affected by CVE-2020-8517.
How can I fix CVE-2020-8517?
To fix CVE-2020-8517, update Squid to version 4.10 or later.
Where can I find more information about CVE-2020-8517?
You can find more information about CVE-2020-8517 at the following references: [Reference 1](http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00012.html), [Reference 2](http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00010.html), [Reference 3](http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00018.html).
- collector/nvd-index
- agent/author
- agent/type
- agent/last-modified-date
- collector/launchpad-cve
- source/Launchpad
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- collector/nvd-cve
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