CVE-2019-12525
First published: Thu Jul 11 2019(Updated: )
An issue was discovered in Squid 3.3.9 through 3.5.28 and 4.x through 4.7. When Squid is configured to use Digest authentication, it parses the header Proxy-Authorization. It searches for certain tokens such as domain, uri, and qop. Squid checks if this token's value starts with a quote and ends with one. If so, it performs a memcpy of its length minus 2. Squid never checks whether the value is just a single quote (which would satisfy its requirements), leading to a memcpy of its length minus 1.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Squid-Cache Squid | >=3.3.9<=3.5.28 | |
| Squid-Cache Squid | >=4.0<=4.7 | |
| Debian Debian Linux | =8.0 | |
| Debian Debian Linux | =9.0 | |
| Debian Debian Linux | =10.0 | |
| openSUSE Leap | =15.0 | |
| openSUSE Leap | =15.1 | |
| Fedoraproject Fedora | =29 | |
| Canonical Ubuntu Linux | =12.04 | |
| Canonical Ubuntu Linux | =16.04 | |
| Canonical Ubuntu Linux | =18.04 | |
| Canonical Ubuntu Linux | =19.04 | |
| ubuntu/squid | <4.4-1ubuntu2.2 | 4.4-1ubuntu2.2 |
| ubuntu/squid | <4.8 | 4.8 |
| ubuntu/squid3 | <3.5.27-1ubuntu1.3 | 3.5.27-1ubuntu1.3 |
| ubuntu/squid3 | <3.5.12-1ubuntu7.8 | 3.5.12-1ubuntu7.8 |
| debian/squid | 4.6-1+deb10u7 4.6-1+deb10u10 4.13-10+deb11u2 5.7-2 6.6-1 |
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Reference Links
- http://www.squid-cache.org/Versions/v4/changesets/
- http://www.squid-cache.org/Versions/v4/changesets/squid-4-7f73e9c5d17664b882ed32590e6af310c247f320.patch
- https://github.com/squid-cache/squid/commits/v4
- https://usn.ubuntu.com/4065-1/
- https://lists.debian.org/debian-lts-announce/2019/07/msg00018.html
- https://usn.ubuntu.com/4065-2/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SPXN2CLAGN5QSQBTOV5IGVLDOQSRFNTZ/
- https://www.debian.org/security/2019/dsa-4507
- https://seclists.org/bugtraq/2019/Aug/42
- http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00053.html
- http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00056.html
- https://lists.debian.org/debian-lts-announce/2020/07/msg00009.html
- https://launchpad.net/bugs/cve/CVE-2019-12525
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPXN2CLAGN5QSQBTOV5IGVLDOQSRFNTZ/
- http://www.squid-cache.org/Advisories/SQUID-2019_3.txt
- http://www.squid-cache.org/Versions/v4/changesets/squid-4-409956536647b3a05ee1e367424a24ae6b8f13fd.patch
- http://www.squid-cache.org/Versions/v3/3.5/changesets/squid-3.5-ec0d0f39cf28da14eead0ba5e777e95855bc2f67.patch
- https://security-tracker.debian.org/tracker/CVE-2019-12525
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-12525
- https://ubuntu.com/security/notices/USN-4065-1
- https://ubuntu.com/security/notices/USN-4065-2
- https://nvd.nist.gov/vuln/detail/CVE-2019-12525
- https://github.com/squid-cache/squid/commit/fb73497a6977ce11170a48a547e16d4a50c3bac2 (master)
- https://github.com/squid-cache/squid/commit/409956536647b3a05ee1e367424a24ae6b8f13fd (4.x)
- https://github.com/squid-cache/squid/commit/ec0d0f39cf28da14eead0ba5e777e95855bc2f67 (3.x)
- https://ubuntu.com/security/CVE-2019-12525
Frequently Asked Questions
What is the vulnerability ID?
The vulnerability ID is CVE-2019-12525.
What is the severity of CVE-2019-12525?
CVE-2019-12525 has a severity value of 9.8, which is considered critical.
Which software versions are affected by CVE-2019-12525?
Squid versions 3.3.9 through 3.5.28 and 4.x through 4.7 are affected by CVE-2019-12525.
How does CVE-2019-12525 impact Squid when using Digest authentication?
CVE-2019-12525 impacts Squid when configured to use Digest authentication by parsing the Proxy-Authorization header and searching for certain tokens.
Is there a fix available for CVE-2019-12525?
Yes, remedies and updates are available for different affected software versions of Squid. Please refer to the provided references for more information on how to fix CVE-2019-12525.
- agent/author
- agent/description
- agent/event
- agent/first-publish-date
- agent/last-modified-date
- agent/references
- agent/remedy
- agent/severity
- agent/softwarecombine
- agent/tags
- agent/type
- agent/weakness
- collector/launchpad-cve
- source/Launchpad
- collector/nvd-cve
- source/NVD
- agent/software-canonical-lookup
- collector/nvd-index
- collector/security-tracker-debian
- source/Debian
- collector/usn-cve
- source/Ubuntu
- vendor/squid-cache
- canonical/squid-cache squid
- version/squid-cache squid/3.3.9
- version/squid-cache squid/3.5.28
- version/squid-cache squid/4.0
- version/squid-cache squid/4.7
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/8.0
- version/debian debian linux/9.0
- version/debian debian linux/10.0
- vendor/opensuse
- canonical/opensuse leap
- version/opensuse leap/15.0
- version/opensuse leap/15.1
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/29
- vendor/canonical
- canonical/canonical ubuntu linux
- version/canonical ubuntu linux/12.04
- version/canonical ubuntu linux/16.04
- version/canonical ubuntu linux/18.04
- version/canonical ubuntu linux/19.04
- package-manager/debian
- package-manager/ubuntu