An issue was discovered in Squid through 4.7. When Squid is parsing ESI, it keeps the ESI elements in ESIContext. ESIContext contains a buffer for holding a stack of ESIElements. When a new ESIElement is parsed, it is added via addStackElement. addStackElement has a check for the number of elements in this buffer, but it's off by 1, leading to a Heap Overflow of 1 element. The overflow is within the same structure so it can't affect adjacent memory blocks, and thus just leads to a crash while processing.
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:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade libecap-develUpgrade libecap | May 4, 2022 | Apr 15, 2020 |
| Alpine Linux | — | Upgrade squid | Jan 5, 2021 | Apr 15, 2020 |
| Amazon Linux Ami 2 | — | Upgrade squidUpgrade squid-migration-scriptUpgrade squid-debuginfoUpgrade squid-sysvinit | Sep 28, 2023 | Apr 15, 2020 |
| Amazon_linux | — | Upgrade squid | Jun 4, 2020 | Apr 15, 2020 |
| Centos_linux | — | Upgrade squid-debuginfoUpgrade libecap-debuginfoUpgrade libecap-debugsourceUpgrade squid-debugsourceUpgrade squidUpgrade libecap-develUpgrade libecap | Nov 5, 2020 | Apr 15, 2020 |
| Debian | — | Upgrade squid | May 11, 2020 | Apr 15, 2020 |
| Gentoo Linux | — | Upgrade net-proxy/squid. | Jun 15, 2020 | Apr 15, 2020 |
| Huawei Euleros 2_0_sp2 | — | Upgrade squid-migration-scriptUpgrade squid | Jun 17, 2020 | Apr 15, 2020 |
| Huawei Euleros 2_0_sp3 | — | Upgrade squidUpgrade squid-migration-script | Sep 28, 2020 | Apr 15, 2020 |
| Huawei Euleros 2_0_sp5 | — | Upgrade squid | Sep 3, 2020 | Apr 15, 2020 |
| Huawei Euleros 2_0_sp8 | — | Upgrade squid | Jul 31, 2020 | Apr 15, 2020 |
| Oracle Solaris | — | Upgrade web/proxy/squid to version 4.11-11.4.22.0.1.69.4 on Solaris 11.4 | Jan 19, 2021 | Apr 15, 2020 |
| Oracle_linux | — | Upgrade squidUpgrade libecap-develUpgrade libecap | Jul 22, 2024 | Apr 24, 2020 |
| Redhat_linux | — | Upgrade libecap-develUpgrade libecapUpgrade libecap-debugsourceUpgrade squid-debuginfoUpgrade libecap-debuginfoNo solution existsUpgrade squid-debugsourceUpgrade squid | Nov 5, 2020 | Apr 15, 2020 |
| Rocky_linux | — | Upgrade libecap-develUpgrade libecap-debugsourceUpgrade libecap-debuginfoUpgrade libecap | Mar 12, 2024 | Apr 15, 2020 |
| Suse | — | Upgrade squid3Upgrade squid | Apr 30, 2020 | Apr 15, 2020 |
| Ubuntu | — | Upgrade squid | Jun 24, 2020 | Apr 15, 2020 |
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