High severity7.5NVD Advisory· Published Apr 8, 2020· Updated Jun 17, 2026
CVE-2019-20637
CVE-2019-20637
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.
Affected products
8- cpe:2.3:a:opensuse:backports_sle:15.0:sp1:*:*:*:*:*:*
cpe:2.3:a:varnish-cache:varnish_cache:*:*:*:*:-:*:*:*+ 1 more
- cpe:2.3:a:varnish-cache:varnish_cache:*:*:*:*:-:*:*:*range: >=6.1.0,<6.2.2
- (no CPE)range: <6.0.5, <6.1.x, <6.2.2, <6.3.1
- cpe:2.3:a:varnish-software:varnish_cache:*:*:*:*:lts:*:*:*Range: >=6.0.0,<6.0.5
- Varnish Cache/Varnish Cachedescription
- osv-coords2 versionspkg:rpm/opensuse/varnish&distro=openSUSE%20Leap%2015.1pkg:rpm/suse/varnish&distro=SUSE%20Package%20Hub%2015%20SP1
< 6.2.1-lp151.3.6.1+ 1 more
- (no CPE)range: < 6.2.1-lp151.3.6.1
- (no CPE)range: < 6.2.1-bp151.4.6.1
Patches
Vulnerability mechanics
References
3- lists.opensuse.org/opensuse-security-announce/2020-06/msg00026.htmlnvdMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-06/msg00031.htmlnvdMailing ListThird Party Advisory
- varnish-cache.org/security/VSV00004.htmlnvdVendor Advisory
News mentions
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