CVE-2019-20637
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.79%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 1.79% probability · 77th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-212
- Affected
- varnish-cache/varnish cache · varnish-software/varnish cache · opensuse/backports sle · opensuse/leap
- Source
- cve@mitre.org
References
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00026.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00031.htmlMailing List, Third Party Advisory
- http://varnish-cache.org/security/VSV00004.html#vsv00004Vendor Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00026.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00031.htmlMailing List, Third Party Advisory
- http://varnish-cache.org/security/VSV00004.html#vsv00004Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.