CVE-2019-12525

Common vulnerabilities & exposures (CVE)

CVE database CVE database blogpost Release & EoL database

Published at: - 11-07-2019 09:15

Last modified: - 26-04-2022 10:18

Total changes: - 3

Description

An issue was discovered in Squid 3.3.9 through 3.5.28 and 4.x through 4.7. When Squid is configured to use Digest authentication, it parses the header Proxy-Authorization. It searches for certain tokens such as domain, uri, and qop. Squid checks if this token's value starts with a quote and ends with one. If so, it performs a memcpy of its length minus 2. Squid never checks whether the value is just a single quote (which would satisfy its requirements), leading to a memcpy of its length minus 1.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Low

Attack complexity

Network

Attack vector

High

Availability

High

Confidentiality

High

Integrity

None

Privileges required

Unchanged

Scope

None

User interaction

9.8

Base score

3.9

5.9

Exploitability score

Impact score

Verification logic

vendor=squid-cache AND product=squid AND versionEndIncluding=3.5.28 AND versionStartIncluding=3.3.9

vendor=squid-cache AND product=squid AND versionEndIncluding=4.7 AND versionStartIncluding=4.0

vendor=Debian AND product=debian_linux AND version=8.0

vendor=Debian AND product=debian_linux AND version=9.0

vendor=Debian AND product=debian_linux AND version=10.0

vendor=opensuse AND product=leap AND version=15.0

vendor=opensuse AND product=leap AND version=15.1

vendor=fedoraproject AND product=fedora AND version=29

vendor=canonical AND product=ubuntu_linux AND version=12.04 AND software_edition=-

vendor=canonical AND product=ubuntu_linux AND version=16.04 AND software_edition=esm

vendor=canonical AND product=ubuntu_linux AND version=18.04 AND software_edition=lts

vendor=canonical AND product=ubuntu_linux AND version=19.04

Reference

http://www.squid-cache.org/Versions/v4/changesets/
http://www.squid-cache.org/Versions/v4/changesets/squid-4-7f73e9c5d17664b882ed32590e6af310c247f320.patch
https://github.com/squid-cache/squid/commits/v4
USN-4065-1-Third Party Advisory
[debian-lts-announce] 20190720 [SECURITY] [DLA 1858-1] squid3 security update-Mailing List, Third Party Advisory
USN-4065-2-Third Party Advisory
FEDORA-2019-cb50bcc189-Mailing List, Third Party Advisory
DSA-4507-Third Party Advisory
20190825 [SECURITY] [DSA 4507-1] squid security update-Mailing List, Third Party Advisory
openSUSE-SU-2019:2541-Mailing List, Third Party Advisory
openSUSE-SU-2019:2540-Mailing List, Third Party Advisory
[debian-lts-announce] 20200710 [SECURITY] [DLA 2278-1] squid3 security update-Mailing List, Third Party Advisory

Keywords

CVE-2019-12525

Common vulnerabilities & exposures (CVE)

Description

Common Vulnerability Scoring System (CVSS)

Verification logic

Reference

NVD

CVE-2019-12525

CVE

Common vulnerabilities & exposures

CVSS

Common vulnerability scoring system

Security

Vulnerabilities

Exposures