Veracode Vulnerability DatabaseVERACODE:28354Insecure Access Control
5.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:N/A:N
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.
| CPE | Name | Operator | Version |
|---|---|---|---|
| squid3:stretch | eq | 3.5.23-5+deb9u1 | |
| squid3:stretch | eq | 3.5.23-5+deb9u1 |
References
lists.opensuse.org/opensuse-security-announce/2019-11/msg00053.html
lists.opensuse.org/opensuse-security-announce/2019-11/msg00056.html
www.squid-cache.org/Versions/v4/changesets/
www.squid-cache.org/Versions/v4/changesets/squid-4-dd46b5417809647f561d8a5e0e74c3aacd235258.patch
github.com/squid-cache/squid/commits/v4
lists.debian.org/debian-lts-announce/2019/07/msg00018.html
lists.debian.org/debian-lts-announce/2020/07/msg00009.html
lists.fedoraproject.org/archives/list/[email protected]/message/SPXN2CLAGN5QSQBTOV5IGVLDOQSRFNTZ/
seclists.org/bugtraq/2019/Aug/42
security-tracker.debian.org/tracker/CVE-2019-12529
usn.ubuntu.com/4065-1/
usn.ubuntu.com/4065-2/
www.debian.org/security/2019/dsa-4507
Related
5.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:N/A:N