PT-2020-9333 · Squid+2 · Squid+3

Published 2019-07-15 · Updated 2021-03-10 · CVE-2019-12522

Positive Technologies (AI Summary)

CVSS v3.1

4.5

Medium

Base vector

AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

Name of the Vulnerable Software and Affected Versions: Squid versions through 4.7

Description: An issue was discovered in Squid when it is run as root. It spawns its child processes as a lesser user, by default the user nobody, via the leave suid call. The leave suid call leaves the Saved UID as 0, making it trivial for an attacker who has compromised the child process to escalate their privileges back to root.

Recommendations: For Squid versions through 4.7, consider disabling the leave suid call as a temporary workaround until a patch is available. Restrict access to the child processes to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Improper Privilege Management

Weakness Enumeration

CWE-269

Related Identifiers

ALT-PU-2019-2264

ALT-PU-2019-2271

CVE-2019-12522

Affected Products

Alt Linux

Debian

Squid

Squid Cache

References · 12

• https://osv.dev/vulnerability/DEBIAN-CVE-2019-12522 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2019-12522 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-12522 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-12522 · Security Note
• https://cve.org/CVERecord?id=CVE-2019-12522 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2019-12522 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2019-12522 · Vendor Advisory
• https://t.me/cibsecurity/11313 · Telegram Post
• https://t.me/cvenotify/11114 · Telegram Post
• https://security.netapp.com/advisory/ntap-20210205-0006 · Note
• https://t.me/cvenotify/2816 · Telegram Post
• https://gitlab.com/jeriko.one/security/-/blob/master/squid/CVEs/CVE-2019-12522.txt · Note