Home/CVE/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 occu
CVE

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 occu

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.

HIGH · CVSS 7.5 EPSS 0.0126
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-617Reachable Assertion
▤

Affected Products & Versions

6
varnish-cache varnish cache>= 6.1.0 and < 6.2.3
varnish-cache varnish cache>= 6.3.0 and < 6.3.2
varnish-software varnish cache>= 6.0.0 and < 6.0.6
opensuse backports sleall versions
opensuse leapall versions
debian linuxall versions
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD08 Apr 2020 · 11:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

5
usnUSN-5474-2
usnUSN-5474-1
suse-csafopenSUSE-SU-2020:0819-1
suse-csafopenSUSE-SU-2020:0808-1
rhsaRHSA-2020:4756Moderate
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00026.htmlMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00031.htmlMailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2022/11/msg00036.htmlMailing ListThird Party Advisory
https://varnish-cache.org/security/VSV00005.html#vsv00005Vendor Advisory
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