Vulnerability in Varnish-Cache Varnish Cache
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 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.
EPSS: 0.018 (77.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Varnish-cache Varnish_cache
- Varnish-software Varnish_cache
- Opensuse Backports_sle — versions 15.0
- Opensuse Leap — versions 15.1
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (x_refsource_MISC, Vendor Advisory)
- cve@mitre.org (vendor-advisory, Mailing List, Third Party Advisory, x_refsource_SUSE)
- cve@mitre.org (vendor-advisory, Mailing List, Third Party Advisory, x_refsource_SUSE)
Frequently asked questions
- What is CVE-2019-20637?
- CVE-2019-20637 is a high-severity vulnerability in Varnish-Cache Varnish Cache, classified under Improper Removal of Sensitive Information Before Storage or Transfer. CVSS score: 7.5/10. Published 2020-04-08.
- How severe is CVE-2019-20637?
- High severity. CVSS v3 base score is 7.5 out of 10.