CVE-2019-20637: opensuse backports_sle
Vulnerability summary
CVE-2019-20637 is a high (CVSS 7.5) vulnerability in opensuse backports_sle. EPSS estimates a 1.79% chance of exploitation in the next 30 days, higher than 78% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 4 · Related 3Timeline
- 08-04-2020PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
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 metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS trend
Probability
1.79%
Chance of exploitation in the next 30 days
Percentile
78%
Versus all other CVEs
30-day change
0.00 pp
From 1.79% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Opensuse2 products
- backports_sle15.0:sp1
- leapEOL15.1
Debian1 product
- varnish< 6.4.0-1
Ubuntu1 product
- varnish< 5.2.1-1ubuntu0.1 | < 6.2.1-2ubuntu0.1
Varnish-cache1 product
- varnish_cache≥ 6.1.0, < 6.2.2 | ≥ 6.3.0, < 6.3.1
Varnish-software1 product
- varnish_cache≥ 6.0.0, < 6.0.5
5 vendors · 6 products
References
8 links- lists.opensuse.org/opensuse-security-announce/2020-06/msg00031.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-06/msg00026.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
