CVE-2018-1000027: Null Pointer Dereference
First published: Mon Jan 22 2018(Updated: )
Due to incorrect pointer handling, Squid versions 3.x (prior to 3.5.27) and 4.x (prior to 4.0.23) are vulnerable to a denial of service attack when processing HTTP messages or downloading intermediate CA certificates. This problem allows a remote client delivering certain HTTP requests in conjunction with certain trusted server responses to trigger a denial of service for all clients accessing the Squid service. Upstream Advisory: <a href="http://www.squid-cache.org/Advisories/SQUID-2018_2.txt">http://www.squid-cache.org/Advisories/SQUID-2018_2.txt</a> Upstream Patches: <a href="http://www.squid-cache.org/Versions/v3/3.5/changesets/SQUID-2018_2.patch">http://www.squid-cache.org/Versions/v3/3.5/changesets/SQUID-2018_2.patch</a> <a href="http://www.squid-cache.org/Versions/v4/changesets/SQUID-2018_2.patch">http://www.squid-cache.org/Versions/v4/changesets/SQUID-2018_2.patch</a>
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Squid-Cache Squid | <4.0.23 | |
| Debian Debian Linux | =7.0 | |
| Debian Debian Linux | =8.0 | |
| Debian Debian Linux | =9.0 | |
| Canonical Ubuntu Linux | =14.04 | |
| Canonical Ubuntu Linux | =16.04 | |
| Canonical Ubuntu Linux | =17.10 | |
| redhat/squid | <3.5.28 | 3.5.28 |
| redhat/squid | <4.0.23 | 4.0.23 |
| debian/squid | 4.13-10+deb11u3 5.7-2+deb12u2 6.12-1 |
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Reference Links
- https://security-tracker.debian.org/tracker/CVE-2018-1000027
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1000027
- http://www.squid-cache.org/Advisories/SQUID-2018_2.txt
- https://security-tracker.debian.org/tracker/CVE-2016-1000024
- https://security-tracker.debian.org/tracker/CVE-2016-1000027
- https://security-tracker.debian.org/tracker/CVE-2018-1000024
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=888720
- http://www.squid-cache.org/Versions/v3/3.5/changesets/SQUID-2018_2.patch
- http://www.squid-cache.org/Versions/v4/changesets/SQUID-2018_2.patch
- https://github.com/squid-cache/squid/pull/129/files
- https://lists.debian.org/debian-lts-announce/2018/02/msg00001.html
- https://lists.debian.org/debian-lts-announce/2018/02/msg00002.html
- https://usn.ubuntu.com/3557-1/
- https://usn.ubuntu.com/4059-2/
- https://www.debian.org/security/2018/dsa-4122
- https://launchpad.net/bugs/cve/CVE-2018-1000027
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1536940
- https://access.redhat.com/errata/RHSA-2020:1068
- https://access.redhat.com/security/cve/cve-2018-1000027
- https://bugzilla.redhat.com/show_bug.cgi?id=1536942
- https://nvd.nist.gov/vuln/detail/CVE-2018-1000027
- https://ubuntu.com/security/CVE-2018-1000027
Frequently Asked Questions
What is the vulnerability ID of this Squid software vulnerability?
The vulnerability ID of this Squid software vulnerability is CVE-2018-1000027.
What is the severity of CVE-2018-1000027?
The severity of CVE-2018-1000027 is high with a score of 7.5.
What is the affected software version for CVE-2018-1000027?
The affected software versions for CVE-2018-1000027 are Squid HTTP Caching Proxy versions prior to version 4.0.23.
What is the impact of CVE-2018-1000027?
CVE-2018-1000027 can result in Denial of Service to all clients of the proxy.
How can I fix CVE-2018-1000027?
To fix CVE-2018-1000027, upgrade to Squid HTTP Caching Proxy version 4.0.23 or higher.
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