Vulnerability · Published Apr 8, 2020 · Assigned by mitre
CVE-2020-11653
High 7.5
In plain English
A high-severity security flaw in the varnish package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.2% (higher than 82% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.5High
Exploit odds (30 days)2.2%top 17.7% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
An issue was discovered in Varnish Cache before 6.0.6 LTS, 6.1.x and 6.2.x before 6.2.3, and 6.3.x before 6.3.2. It occurs when communication with a TLS termination proxy uses PROXY version 2. There can be an assertion failure and daemon restart, which causes a performance loss.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | varnish | 6.4.0-1 | DEBIAN-CVE-2020-11653 |
| Debian:13 | varnish | 6.4.0-1 | DEBIAN-CVE-2020-11653 |
| Rocky Linux:8 | varnish | 0:6.0.6-2.module+el8.3.0+179+20b582cc | RLSA-2020:4756 |
| Rocky Linux:8 | varnish-modules | 0:0.15.0-5.module+el8.3.0+179+20b582cc | RLSA-2020:4756 |
| Ubuntu:22.04:LTS | varnish | 6.6.1-1ubuntu0.2 | USN-5474-1 |
Affected products (as reported)
References
- https://varnish-cache.org/security/VSV00005.html#vsv00005
- openSUSE-SU-2020:0819 vendor-advisory
- openSUSE-SU-2020:0808 vendor-advisory
- [debian-lts-announce] 20221127 [SECURITY] [DLA 3208-1] varnish security update mailing-list