DEBIAN-CVE-2019-12522

See a problem?
Please try reporting it to the source first.
Source
https://security-tracker.debian.org/tracker/CVE-2019-12522
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2019-12522.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2019-12522
Upstream
Published
2020-04-15T19:15:12.473Z
Modified
2025-11-19T01:01:57.561539Z
Severity
  • 4.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L CVSS Calculator
Summary
[none]
Details

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 leavesuid call. leavesuid 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.

References

Affected packages

Debian:11 / squid

Package

Name
squid
Purl
pkg:deb/debian/squid?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

4.*
4.13-10
4.13-10+deb11u1
4.13-10+deb11u2
4.13-10+deb11u3
4.13-10+deb11u4
4.13-10+deb11u5
4.13-10+deb11u6
5.*
5.1-2
5.2-1
5.5-1
5.5-1.1
5.6-1
5.7-1
5.7-2
6.*
6.1-1
6.1-2
6.3-1
6.5-1
6.6-1
6.8-1
6.9-1
6.10-1
6.12-1
6.13-1
6.13-2
7.*
7.1-1
7.2-1
7.2-2
7.4-1

Ecosystem specific 

{
    "urgency": "unimportant"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2019-12522.json"

Debian:12 / squid

Package

Name
squid
Purl
pkg:deb/debian/squid?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*
5.7-2
5.7-2+deb12u1
5.7-2+deb12u2
5.7-2+deb12u3
5.7-2+deb12u4
5.7-2+deb12u5
6.*
6.1-1
6.1-2
6.3-1
6.5-1
6.6-1
6.8-1
6.9-1
6.10-1
6.12-1
6.13-1
6.13-2
7.*
7.1-1
7.2-1
7.2-2
7.4-1

Ecosystem specific 

{
    "urgency": "unimportant"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2019-12522.json"

Debian:13 / squid

Package

Name
squid
Purl
pkg:deb/debian/squid?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

6.*
6.13-2
6.13-2+deb13u1
7.*
7.1-1
7.2-1
7.2-2
7.4-1

Ecosystem specific 

{
    "urgency": "unimportant"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2019-12522.json"

Debian:14 / squid

Package

Name
squid
Purl
pkg:deb/debian/squid?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

6.*
6.13-2
7.*
7.1-1
7.2-1
7.2-2
7.4-1

Ecosystem specific 

{
    "urgency": "unimportant"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2019-12522.json"