varnish: Varnish Cache is a high-performance HTTP accelerator
CVE-2019-20637 is fixed in 6 products on 1 platform, first by RHSA-2020:4756, released November 4, 2020. It is not reported as exploited. Patch Radar priority: High.
Varnish Cache is a high-performance HTTP accelerator. It stores web pages in memory so web servers don't have to create the same web page over and over again, giving the website a significant speed up. The following packages have been upgraded to a later upstream version: varnish (6.0.6). (BZ#1795673) Security Fix(es): * varnish: denial of service handling certain crafted HTTP/1 requests (CVE-2019-15892) * varnish: remote clients may cause Varnish to assert and restart which could result in DoS (CVE-2020-11653) * varnish: not clearing pointer between two client requests leads to information disclosure (CVE-2019-20637) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.3 Release Notes linked from the References section.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libvarnishapi1 · Ubuntu 18.04.6 LTS (bionic) | 5.2.1-1ubuntu0.1 | libvarnishapi1 5.2.1-1ubuntu0.1 | Jan 25, 2022 |
| libvarnishapi2 · Ubuntu 20.04 LTS (focal) | 6.2.1-2ubuntu0.1 | libvarnishapi2 6.2.1-2ubuntu0.1 | Jan 25, 2022 |
| varnish · RHEL 8 | 0:6.0.6-2.module+el8.3.0+6843+b3b42fcc | RHSA-2020:4756 | Nov 4, 2020 |
| varnish · Ubuntu 18.04.6 LTS (bionic) | 5.2.1-1ubuntu0.1 | varnish 5.2.1-1ubuntu0.1 | Jan 25, 2022 |
| varnish · Ubuntu 20.04 LTS (focal) | 6.2.1-2ubuntu0.1 | varnish 6.2.1-2ubuntu0.1 | Jan 25, 2022 |
| varnish · ol 8 | 0:6.0.6-2.module+el8.3.0+7653+45014445 | ELSA-2020-4756 | Nov 10, 2020 |
| varnish-devel · RHEL 8 | 0:6.0.6-2.module+el8.3.0+6843+b3b42fcc | RHSA-2020:4756 | Nov 4, 2020 |
| varnish-devel · ol 8 | 0:6.0.6-2.module+el8.3.0+7653+45014445 | ELSA-2020-4756 | Nov 10, 2020 |
| varnish-docs · RHEL 8 | 0:6.0.6-2.module+el8.3.0+6843+b3b42fcc | RHSA-2020:4756 | Nov 4, 2020 |
| varnish-docs · ol 8 | 0:6.0.6-2.module+el8.3.0+7653+45014445 | ELSA-2020-4756 | Nov 10, 2020 |
| varnish-modules · RHEL 8 | 0:0.15.0-5.module+el8.3.0+6843+b3b42fcc | RHSA-2020:4756 | Nov 4, 2020 |
| varnish-modules · ol 8 | 0:0.15.0-5.module+el8.3.0+7653+45014445 | ELSA-2020-4756 | Nov 10, 2020 |
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