CVE-2019-12529
An attacker would not be able to retrieve the decoded data unless the Squid maintainer had configured the display of usernames on error pages.
Does this matter?
Lower severity and a low EPSS score (8.09%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.9 MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 8.09% probability · 95th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-125
- Affected
- squid-cache/squid · debian/debian linux · fedoraproject/fedora · opensuse/leap · canonical/ubuntu linux
- Source
- cve@mitre.org
EPSS 8.1% since 27 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00053.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00056.htmlMailing List, Third Party Advisory
- http://www.squid-cache.org/Versions/v4/changesets/Vendor Advisory
- http://www.squid-cache.org/Versions/v4/changesets/squid-4-dd46b5417809647f561d8a5e0e74c3aacd235258.patchPatch, Vendor Advisory
- https://github.com/squid-cache/squid/commits/v4Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/07/msg00018.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/07/msg00009.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPXN2CLAGN5QSQBTOV5IGVLDOQSRFNTZ/
- https://seclists.org/bugtraq/2019/Aug/42Mailing List, Third Party Advisory
- https://usn.ubuntu.com/4065-1/Third Party Advisory
- https://usn.ubuntu.com/4065-2/Third Party Advisory
- https://www.debian.org/security/2019/dsa-4507Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00053.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00056.htmlMailing List, Third Party Advisory
- http://www.squid-cache.org/Versions/v4/changesets/Vendor Advisory
- http://www.squid-cache.org/Versions/v4/changesets/squid-4-dd46b5417809647f561d8a5e0e74c3aacd235258.patchPatch, Vendor Advisory
- https://github.com/squid-cache/squid/commits/v4Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/07/msg00018.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/07/msg00009.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPXN2CLAGN5QSQBTOV5IGVLDOQSRFNTZ/
- https://seclists.org/bugtraq/2019/Aug/42Mailing List, Third Party Advisory
- https://usn.ubuntu.com/4065-1/Third Party Advisory
- https://usn.ubuntu.com/4065-2/Third Party Advisory
- https://www.debian.org/security/2019/dsa-4507Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.