CVE-2020-11653

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.

• CWE-617

• http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00026.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00031.htmlMailing List, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2022/11/msg00036.htmlMailing List, Third Party Advisory
• https://varnish-cache.org/security/VSV00005.html#vsv00005Vendor Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00026.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00031.htmlMailing List, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2022/11/msg00036.htmlMailing List, Third Party Advisory
• https://varnish-cache.org/security/VSV00005.html#vsv00005Vendor Advisory

Published

Apr 8, 2020

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2020-11647In Wireshark 3.2.0 to 3.2.2, 3.0.0 to 3.0.9, and 2.6.0 to 2.…7.5
• CVE-2020-11649An issue was discovered in GitLab CE and EE 8.15 through 12.…6.5
• CVE-2020-1165An elevation of privilege vulnerability exists when Windows …7.8
• CVE-2020-11650An issue was discovered in iXsystems FreeNAS (and TrueNAS) 1…7.5
• CVE-2020-11651An issue was discovered in SaltStack Salt before 2019.2.4 an…9.8
• CVE-2020-11652An issue was discovered in SaltStack Salt before 2019.2.4 an…6.5
• CVE-2020-11655SQLite through 3.31.1 allows attackers to cause a denial of …7.5
• CVE-2020-11656In SQLite through 3.31.1, the ALTER TABLE implementation has…9.8
• CVE-2020-11658CA API Developer Portal 4.3.1 and earlier handles shared sec…9.8
• CVE-2020-11659CA API Developer Portal 4.3.1 and earlier contains an access…4.3
• CVE-2020-1166An elevation of privilege vulnerability exists when Windows …7.8
• CVE-2020-11660CA API Developer Portal 4.3.1 and earlier contains an access…6.5