Home/CVE/An issue was discovered in Varnish Cache before 6.0.5 LTS, 6.1.x and 6.2.x before 6.2.2, and 6.3.x before 6.3.1. It does
CVE

CVE-2019-20637

An issue was discovered in Varnish Cache before 6.0.5 LTS, 6.1.x and 6.2.x before 6.2.2, and 6.3.x before 6.3.1. It does

An issue was discovered in Varnish Cache before 6.0.5 LTS, 6.1.x and 6.2.x before 6.2.2, and 6.3.x before 6.3.1. It does not clear a pointer between the handling of one client request and the next request within the same connection. This sometimes causes information to be disclosed from the connection workspace, such as data structures associated with previous requests within this connection or VCL-related temporary headers.

HIGH · CVSS 7.5 EPSS 0.00478
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-212Improper Removal of Sensitive Information Before Storage or Transfer
▤

Affected Products & Versions

5
varnish-cache varnish cache>= 6.1.0 and < 6.2.2
varnish-cache varnish cache>= 6.3.0 and < 6.3.1
varnish-software varnish cache>= 6.0.0 and < 6.0.5
opensuse backports sleall versions
opensuse leapall 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:H/I:N/A:N
⚑

Vendor Advisories

4
usnUSN-5474-1
suse-csafopenSUSE-SU-2020:0819-1
suse-csafopenSUSE-SU-2020:0808-1
rhsaRHSA-2020:4756Moderate
🔗

References & Sources

3
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
http://varnish-cache.org/security/VSV00004.html#vsv00004Vendor Advisory
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