CVE-2019-20637 — Improper Removal of Sensitive Information Before Storage or Transfer in Varnish Cache
Severity
7.5HIGHNVD
EPSS
0.5%
top 35.00%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedApr 8
Latest updateJun 8
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NExploitability: 3.9 | Impact: 3.6
Affected Packages6 packages
🔴Vulnerability Details
4📋Vendor Advisories
3💬Community
1Bugzilla▶
CVE-2019-20637 varnish: not clearing pointer between two client requests leads to information disclosure↗2019-11-14