CVE-2017-12425
varnish - security update
Description
An issue was discovered in Varnish HTTP Cache 4.0.1 through 4.0.4, 4.1.0 through 4.1.7, 5.0.0, and 5.1.0 through 5.1.2. A wrong if statement in the varnishd source code means that particular invalid requests from the client can trigger an assert, related to an Integer Overflow. This causes the varnishd worker process to abort and restart, losing the cached contents in the process. An attacker can therefore crash the varnishd worker process on demand and effectively keep it from serving content - a Denial-of-Service attack. The specific source-code filename containing the incorrect statement varies across releases.
How to fix CVE-2017-12425
To remediate CVE-2017-12425, upgrade the affected package to a fixed version below.
- —upgrade to 5.1.3-r0 or later
- —upgrade to 5.0.0-7.1 or later
- —upgrade to 4.0.2-1+deb8u1 or later
Is CVE-2017-12425 being exploited?
Low — EPSS is 1.4%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 5.1.3-r0
- from 0, < 5.0.0-7.1
- from 0, < 4.0.2-1+deb8u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |