CVEvulnerability
CVE-2021-36740
6.5 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2021-07-14
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- CVSS 2.0 ([email protected])
- 6.4 MEDIUM — AV:N/AC:L/Au:N/C:P/I:P/A:N
- Weaknesses
- CWE-444
Description
Varnish Cache, with HTTP/2 enabled, allows request smuggling and VCL authorization bypass via a large Content-Length header for a POST request. This affects Varnish Enterprise 6.0.x before 6.0.8r3, and Varnish Cache 5.x and 6.x before 6.5.2, 6.6.x before 6.6.1, and 6.0 LTS before 6.0.8.
Affected configurations
• varnish-cache varnish cache (>= 6.0.0 < 6.0.8)
• varnish-cache varnish cache 6.0.8
• varnish-software varnish cache (>= 6.0.0 <= 6.0.5)
• varnish-software varnish cache (>= 6.0.0 <= 6.0.7)
• varnish cache project varnish cache (>= 5.0.0 <= 5.2.1)
• varnish cache project varnish cache (>= 6.1.0 <= 6.6.0)
• fedoraproject fedora 33
• fedoraproject fedora 34
• debian debian linux 10.0
• debian debian linux 11.0
Related
Weakness · CWE (1)
- CWE-444 Inconsistent Interpretation of HTTP Requests weakness
References
- https://docs.varnish-software.com/security/VSV00007/ Mitigation, Vendor Advisory
- https://github.com/varnishcache/varnish-cache/commit/82b0a629f60136e76112c6f2c6372cce77b683be Patch, Third Party Advisory
- https://github.com/varnishcache/varnish-cache/commit/9be22198e258d0e7a5c41f4291792214a29405cf Patch, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/THV2DQA2GS65HUCKK4KSD2XLN3AAQ2V5/ lists.fedoraproject.org
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZHBNLDEOTGYRIEQZBWV7F6VPYS4O2AAK/ lists.fedoraproject.org
- https://varnish-cache.org/security/VSV00007.html Mitigation, Vendor Advisory
- https://www.debian.org/security/2022/dsa-5088 Third Party Advisory
- https://docs.varnish-software.com/security/VSV00007/ Mitigation, Vendor Advisory
- https://github.com/varnishcache/varnish-cache/commit/82b0a629f60136e76112c6f2c6372cce77b683be Patch, Third Party Advisory
- https://github.com/varnishcache/varnish-cache/commit/9be22198e258d0e7a5c41f4291792214a29405cf Patch, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/THV2DQA2GS65HUCKK4KSD2XLN3AAQ2V5/ lists.fedoraproject.org
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZHBNLDEOTGYRIEQZBWV7F6VPYS4O2AAK/ lists.fedoraproject.org
- https://varnish-cache.org/security/VSV00007.html Mitigation, Vendor Advisory
- https://www.debian.org/security/2022/dsa-5088 Third Party Advisory