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-Cache Squid | <=4.7 |
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Reference Links
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/)
- collector/nvd-index
- agent/references
- agent/severity
- agent/author
- agent/weakness
- agent/tags
- agent/description
- agent/event
- agent/type
- agent/last-modified-date
- agent/softwarecombine
- agent/first-publish-date
- vendor/squid-cache
- canonical/squid-cache squid
- version/squid-cache squid/4.7