squid-openssl: An issue was discovered in Squid before 4.15 and 5.x before 5.0.6
CVE-2021-31807 is fixed in 9 products on 1 platform, first by squid 3.5.27-1ubuntu1.11, released May 28, 2021. It is not reported as exploited. Patch Radar priority: Routine.
An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Aninteger overflow problem allows a remote server to achieve Denial ofService when delivering responses to HTTP Range requests. The issue triggeris a header that can be expected to exist in HTTP traffic without anymalicious intent.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libecap · RHEL 8 | 0:1.0.1-2.module+el8.1.0+4044+36416a77 | RHSA-2021:4292 | Nov 9, 2021 |
| libecap · ol 8 | 0:1.0.1-2.module+el8.3.0+7819+eb7d4ef6 | ELSA-2021-4292 | Nov 16, 2021 |
| libecap-devel · RHEL 8 | 0:1.0.1-2.module+el8.1.0+4044+36416a77 | RHSA-2021:4292 | Nov 9, 2021 |
| libecap-devel · ol 8 | 0:1.0.1-2.module+el8.3.0+7819+eb7d4ef6 | ELSA-2021-4292 | Nov 16, 2021 |
| squid · RHEL 8 | 7:4.15-1.module+el8.5.0+11469+24c223d9 | RHSA-2021:4292 | Nov 9, 2021 |
| squid · Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.11 | squid 3.5.27-1ubuntu1.11 | May 28, 2021 |
| squid · Ubuntu 20.04 LTS (focal) | 4.10-1ubuntu1.4 | squid 4.10-1ubuntu1.4 | May 28, 2021 |
| squid · Ubuntu 24.10 (oracular) | 4.13-10ubuntu1 | squid 4.13-10ubuntu1 | Jan 16, 2026 |
| squid · Ubuntu 25.04 (plucky) | 4.13-10ubuntu1 | squid 4.13-10ubuntu1 | Jan 16, 2026 |
| squid · ol 8 | 7:4.15-1.module+el8.5.0+20327+24c223d9 | ELSA-2021-4292 | Nov 16, 2021 |
| squid-cgi · Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.11 | squid-cgi 3.5.27-1ubuntu1.11 | May 28, 2021 |
| squid-cgi · Ubuntu 20.04 LTS (focal) | 4.10-1ubuntu1.4 | squid-cgi 4.10-1ubuntu1.4 | May 28, 2021 |
| squid-cgi · Ubuntu 24.10 (oracular) | 4.13-10ubuntu1 | squid-cgi 4.13-10ubuntu1 | Jan 16, 2026 |
| squid-cgi · Ubuntu 25.04 (plucky) | 4.13-10ubuntu1 | squid-cgi 4.13-10ubuntu1 | Jan 16, 2026 |
| squid-common · Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.11 | squid-common 3.5.27-1ubuntu1.11 | May 28, 2021 |
| squid-common · Ubuntu 20.04 LTS (focal) | 4.10-1ubuntu1.4 | squid-common 4.10-1ubuntu1.4 | May 28, 2021 |
| squid-common · Ubuntu 24.10 (oracular) | 4.13-10ubuntu1 | squid-common 4.13-10ubuntu1 | Jan 16, 2026 |
| squid-common · Ubuntu 25.04 (plucky) | 4.13-10ubuntu1 | squid-common 4.13-10ubuntu1 | Jan 16, 2026 |
| squid-openssl · Ubuntu 24.10 (oracular) | 4.13-10ubuntu1 | squid-openssl 4.13-10ubuntu1 | Jan 16, 2026 |
| squid-openssl · Ubuntu 25.04 (plucky) | 4.13-10ubuntu1 | squid-openssl 4.13-10ubuntu1 | Jan 16, 2026 |
| squid-purge · Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.11 | squid-purge 3.5.27-1ubuntu1.11 | May 28, 2021 |
| squid-purge · Ubuntu 20.04 LTS (focal) | 4.10-1ubuntu1.4 | squid-purge 4.10-1ubuntu1.4 | May 28, 2021 |
| squid-purge · Ubuntu 24.10 (oracular) | 4.13-10ubuntu1 | squid-purge 4.13-10ubuntu1 | Jan 16, 2026 |
| squid-purge · Ubuntu 25.04 (plucky) | 4.13-10ubuntu1 | squid-purge 4.13-10ubuntu1 | Jan 16, 2026 |
| squid3 · Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.11 | squid3 3.5.27-1ubuntu1.11 | May 28, 2021 |
| squidclient · Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.11 | squidclient 3.5.27-1ubuntu1.11 | May 28, 2021 |
| squidclient · Ubuntu 20.04 LTS (focal) | 4.10-1ubuntu1.4 | squidclient 4.10-1ubuntu1.4 | May 28, 2021 |
| squidclient · Ubuntu 24.10 (oracular) | 4.13-10ubuntu1 | squidclient 4.13-10ubuntu1 | Jan 16, 2026 |
| squidclient · Ubuntu 25.04 (plucky) | 4.13-10ubuntu1 | squidclient 4.13-10ubuntu1 | Jan 16, 2026 |
Patch Radar data is free to use with attribution. Terms and how to credit it.
Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.