CVE-2019-12522

Description

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.

Category

4.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.04%
Third-Party Advisory gitlab.com Third-Party Advisory netapp.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://gitlab.com/jeriko.one/security/-/blob/master/squid/CVEs/CVE-2019-12522.txt third party advisory
https://security.netapp.com/advisory/ntap-20210205-0006/ third party advisory

Frequently Asked Questions

What is the severity of CVE-2019-12522?
CVE-2019-12522 has been scored as a medium severity vulnerability.
How to fix CVE-2019-12522?
To fix CVE-2019-12522, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-12522 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2019-12522 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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