What is the vulnerability ID for this issue in Squid?

The vulnerability ID for this issue in Squid is CVE-2019-12522.

What is the severity rating for CVE-2019-12522?

CVE-2019-12522 has a severity rating of medium (4.5).

How does the vulnerability in Squid (CVE-2019-12522) occur?

When Squid is run as root, it spawns its child processes as a lesser user, leaving the Saved UID as 0, which can be exploited by an attacker who has compromised the child process.

Which version of Squid is affected by CVE-2019-12522?

Squid versions up to and including 4.7 are affected by CVE-2019-12522.

Are there any references available for CVE-2019-12522?

Yes, you can find references for CVE-2019-12522 at the following links: - [https://gitlab.com/jeriko.one/security/-/blob/master/squid/CVEs/CVE-2019-12522.txt](https://gitlab.com/jeriko.one/security/-/blob/master/squid/CVEs/CVE-2019-12522.txt) - [https://security.netapp.com/advisory/ntap-20210205-0006/](https://security.netapp.com/advisory/ntap-20210205-0006/)

Vulnerability/
CVE-2019-12522

medium

4.5

CWE

269

15/4/2020

4/8/2024

CVE-2019-12522

First published: Wed Apr 15 2020(Updated: )

An issue was discovered in Squid through 4.7. When Squid is run as root, it spawns its child processes as a lesser user, by default the user nobody. This is done via the leave_suid call. leave_suid leaves the Saved UID as 0. This makes it trivial for an attacker who has compromised the child process to escalate their privileges back to root.

Credit: cve@mitre.org

Affected Software	Affected Version	How to fix
Squid Web Proxy Cache	<=4.7

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Frequently Asked Questions

What is the vulnerability ID for this issue in Squid?
The vulnerability ID for this issue in Squid is CVE-2019-12522.
What is the severity rating for CVE-2019-12522?
CVE-2019-12522 has a severity rating of medium (4.5).
How does the vulnerability in Squid (CVE-2019-12522) occur?
When Squid is run as root, it spawns its child processes as a lesser user, leaving the Saved UID as 0, which can be exploited by an attacker who has compromised the child process.
Which version of Squid is affected by CVE-2019-12522?
Squid versions up to and including 4.7 are affected by CVE-2019-12522.
Are there any references available for CVE-2019-12522?
Yes, you can find references for CVE-2019-12522 at the following links: - [https://gitlab.com/jeriko.one/security/-/blob/master/squid/CVEs/CVE-2019-12522.txt](https://gitlab.com/jeriko.one/security/-/blob/master/squid/CVEs/CVE-2019-12522.txt) - [https://security.netapp.com/advisory/ntap-20210205-0006/](https://security.netapp.com/advisory/ntap-20210205-0006/)

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agent/softwarecombine
collector/mitre-cve
source/MITRE
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agent/author
agent/weakness
agent/description
agent/first-publish-date
agent/event
agent/source
agent/tags
collector/nvd-index
agent/software-canonical-lookup-request
vendor/squid-cache
canonical/squid web proxy cache
version/squid web proxy cache/4.7

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