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CVE-2019-12529

Common vulnerabilities & exposures (CVE)

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Published at: - 11-07-2019 09:15
Last modified: - 26-04-2022 10:22
Total changes: - 3

Description

An issue was discovered in Squid 2.x through 2.7.STABLE9, 3.x through 3.5.28, and 4.x through 4.7. When Squid is configured to use Basic Authentication, the Proxy-Authorization header is parsed via uudecode. uudecode determines how many bytes will be decoded by iterating over the input and checking its table. The length is then used to start decoding the string. There are no checks to ensure that the length it calculates isn't greater than the input buffer. This leads to adjacent memory being decoded as well. An attacker would not be able to retrieve the decoded data unless the Squid maintainer had configured the display of usernames on error pages.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
High
Attack complexity
Network
Attack vector
None
Availability
High
Confidentiality
None
Integrity
None
Privileges required
Unchanged
Scope
None
User interaction
5.9
Base score
2.2
3.6
Exploitability score
Impact score
 

Verification logic

OR
OR
vendor=squid-cache AND product=squid AND versionStartIncluding=2.0 AND versionEndExcluding=2.7
vendor=squid-cache AND product=squid AND version=2.7 AND update=stable1
vendor=squid-cache AND product=squid AND version=2.7 AND update=stable2
vendor=squid-cache AND product=squid AND version=2.7 AND update=stable3
vendor=squid-cache AND product=squid AND version=2.7 AND update=stable4
vendor=squid-cache AND product=squid AND version=2.7 AND update=stable5
vendor=squid-cache AND product=squid AND version=2.7 AND update=stable6
vendor=squid-cache AND product=squid AND version=2.7 AND update=stable7
vendor=squid-cache AND product=squid AND version=2.7 AND update=stable8
vendor=squid-cache AND product=squid AND version=2.7 AND update=stable9
vendor=squid-cache AND product=squid AND versionEndIncluding=3.5.28 AND versionStartIncluding=3.0
vendor=squid-cache AND product=squid AND versionEndIncluding=4.7 AND versionStartIncluding=4.0
OR
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
OR
vendor=fedoraproject AND product=fedora AND version=29
OR
vendor=opensuse AND product=leap AND version=15.0
vendor=opensuse AND product=leap AND version=15.1
OR
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

 


Keywords

NVD

 

CVE-2019-12529

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures

 

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