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 Details
- CVSS 3.1 Base Score: 5.9
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade libecap-develUpgrade libecap | May 4, 2022 | Jul 11, 2019 |
| Alpine Linux | — | Upgrade squid | Jan 19, 2021 | Jul 11, 2019 |
| Amazon Linux Ami 2 | — | Upgrade squidUpgrade squid-migration-scriptUpgrade squid-debuginfoUpgrade squid-sysvinit | Oct 27, 2023 | Jul 11, 2019 |
| Centos_linux | — | Upgrade libecap-debuginfoUpgrade libecap-develUpgrade libecapUpgrade squidUpgrade squid-debugsourceUpgrade libecap-debugsourceUpgrade squid-debuginfo | Nov 5, 2020 | Jul 11, 2019 |
| Debian | — | Upgrade squid | Jul 22, 2019 | Jul 11, 2019 |
| Huawei Euleros 2_0_sp8 | — | Upgrade squid | Sep 30, 2019 | Jul 11, 2019 |
| Oracle Solaris | — | Upgrade web/proxy/squid to version 4.8-11.4.15.0.1.3.0 on Solaris 11.4 | Nov 20, 2019 | Jul 11, 2019 |
| Oracle_linux | — | Upgrade libecapUpgrade libecap-develUpgrade squid | Jul 22, 2024 | Jul 11, 2019 |
| Redhat_linux | — | Upgrade squid-debugsourceUpgrade libecap-debugsourceUpgrade libecap-debuginfoNo solution existsUpgrade squid-debuginfoUpgrade squidUpgrade libecap-develUpgrade libecap | Nov 5, 2020 | Jul 11, 2019 |
| Rocky_linux | — | Upgrade libecapUpgrade libecap-debuginfoUpgrade libecap-develUpgrade libecap-debugsource | Mar 12, 2024 | Jul 11, 2019 |
| Suse | — | Upgrade squid3Upgrade squid | Aug 9, 2019 | Jul 11, 2019 |
| Ubuntu | — | Upgrade squid3Upgrade squid | Jul 19, 2019 | Jul 11, 2019 |
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