CVE-2019-12519
First published: Wed Apr 15 2020(Updated: )
An issue was discovered in Squid through 4.7. When handling the tag esi:when when ESI is enabled, Squid calls ESIExpression::Evaluate. This function uses a fixed stack buffer to hold the expression while it's being evaluated. When processing the expression, it could either evaluate the top of the stack, or add a new member to the stack. When adding a new member, there is no check to ensure that the stack won't overflow.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Squid-Cache Squid | >=3.0<=3.5.28 | |
| Squid-Cache Squid | >=4.0<=4.10 | |
| Squid-Cache Squid | >=5.0<=5.0.1 | |
| Debian Debian Linux | =9.0 | |
| Debian Debian Linux | =10.0 | |
| Canonical Ubuntu Linux | =16.04 | |
| Canonical Ubuntu Linux | =18.04 | |
| Canonical Ubuntu Linux | =19.10 | |
| Canonical Ubuntu Linux | =20.04 | |
| openSUSE Leap | =15.1 | |
| ubuntu/squid | <4.8-1ubuntu2.3 | 4.8-1ubuntu2.3 |
| ubuntu/squid | <4.10-1ubuntu1.1 | 4.10-1ubuntu1.1 |
| ubuntu/squid | <4.10-1ubuntu2 | 4.10-1ubuntu2 |
| ubuntu/squid | <4.10-1ubuntu2 | 4.10-1ubuntu2 |
| ubuntu/squid | <4.11 | 4.11 |
| ubuntu/squid3 | <3.5.27-1ubuntu1.6 | 3.5.27-1ubuntu1.6 |
| ubuntu/squid3 | <3.5.12-1ubuntu7.11 | 3.5.12-1ubuntu7.11 |
| 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/2020-05/msg00018.html
- http://www.openwall.com/lists/oss-security/2020/04/23/1
- https://gitlab.com/jeriko.one/security/-/blob/master/squid/CVEs/CVE-2019-12519.txt
- https://lists.debian.org/debian-lts-announce/2020/07/msg00009.html
- https://security.gentoo.org/glsa/202005-05
- https://security.netapp.com/advisory/ntap-20210205-0006/
- https://usn.ubuntu.com/4356-1/
- https://www.debian.org/security/2020/dsa-4682
- https://launchpad.net/bugs/cve/CVE-2019-12519
- http://www.squid-cache.org/Advisories/SQUID-2019_12.txt
- https://ubuntu.com/security/notices/USN-4356-1
- https://www.cve.org/CVERecord?id=CVE-2019-12519
- https://nvd.nist.gov/vuln/detail/CVE-2019-12519
- https://security-tracker.debian.org/tracker/CVE-2019-12519
- http://www.squid-cache.org/Versions/v4/changesets/squid-4-fdd4123629320aa1ee4c3481bb392437c90d188d.patch
- https://ubuntu.com/security/CVE-2019-12519
Frequently Asked Questions
What is CVE-2019-12519?
CVE-2019-12519 is a vulnerability discovered in Squid through version 4.7.
What is the severity of CVE-2019-12519?
CVE-2019-12519 has a severity rating of 9.8 out of 10.
How does CVE-2019-12519 affect Squid?
CVE-2019-12519 affects Squid when handling the esi:when tag and ESI is enabled.
What is the fix for CVE-2019-12519?
To fix CVE-2019-12519, upgrade Squid to version 4.8-1ubuntu2.3 (for Ubuntu) or 4.13-10+deb11u2 (for Debian) depending on your operating system.
Where can I find more information about CVE-2019-12519?
More information about CVE-2019-12519 can be found at the following links: [Link1](https://gitlab.com/jeriko.one/security/-/blob/master/squid/CVEs/CVE-2019-12519.txt), [Link2](http://www.openwall.com/lists/oss-security/2020/04/23/1), [Link3](https://www.debian.org/security/2020/dsa-4682).
- collector/nvd-index
- agent/type
- agent/last-modified-date
- collector/launchpad-cve
- source/Launchpad
- agent/author
- agent/first-publish-date
- agent/weakness
- agent/remedy
- agent/severity
- agent/description
- collector/nvd-cve
- source/NVD
- agent/software-canonical-lookup
- collector/usn-cve
- source/Ubuntu
- collector/security-tracker-debian
- source/Debian
- agent/references
- agent/tags
- agent/softwarecombine
- agent/event
- vendor/squid-cache
- canonical/squid-cache squid
- version/squid-cache squid/3.0
- version/squid-cache squid/3.5.28
- version/squid-cache squid/4.0
- version/squid-cache squid/4.10
- version/squid-cache squid/5.0
- version/squid-cache squid/5.0.1
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/9.0
- version/debian debian linux/10.0
- vendor/canonical
- canonical/canonical ubuntu linux
- version/canonical ubuntu linux/16.04
- version/canonical ubuntu linux/18.04
- version/canonical ubuntu linux/19.10
- version/canonical ubuntu linux/20.04
- vendor/opensuse
- canonical/opensuse leap
- version/opensuse leap/15.1
- package-manager/ubuntu
- package-manager/debian