CVE-2019-20637
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductVarnish-cache Varnish Cache
PublishedApr 8, 2020
First seenApr 8, 2020
How to fix
Update
- varnish-cache varnish_cache6.2.2, 6.3.1 or later
- varnish-software varnish_cache6.0.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| varnish-cache varnish_cache | 6.1.0 ≤ v < 6.2.2, 6.3.0 ≤ v < 6.3.1 | 6.2.2, 6.3.1 |
| varnish-software varnish_cache | 6.0.0 ≤ v < 6.0.5 | 6.0.5 |
| opensuse backports_sle | 15.0 | — |
| opensuse leap | 15.1 | — |
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