High severity · published Apr 8, 2020
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
7.5
CVSS
2.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.2% · higher than 82% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BS
Backports Sle · Opensuse
15.0 · source: NVD
DL
Debian Linux · Debian
10.0 · source: NVD
LE
Leap · Opensuse
15.1 · source: NVD
VC
Varnish Cache · Varnish-cache
6.1.0 before 6.2.3; 6.3.0 before 6.3.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-11653
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-11653
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00026.html
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00031.html
Mailing List
https://lists.debian.org/debian-lts-announce/2022/11/msg00036.html
Vendor Advisory
https://varnish-cache.org/security/VSV00005.html#vsv00005
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