CVE-2017-9526
libgcrypt20 - security update
5.9
MEDIUM
CVSS 3.1
EPSS 0.65%
Description
In Libgcrypt before 1.7.7, an attacker who learns the EdDSA session key (from side-channel observation during the signing process) can easily recover the long-term secret key. 1.7.7 makes a cipher/ecc-eddsa.c change to store this session key in secure memory, to ensure that constant-time point operations are used in the MPI library.
How to fix CVE-2017-9526
To remediate CVE-2017-9526, upgrade the affected package to a fixed version below.
- —upgrade to 1.7.6-2 or later
- —upgrade to 1.6.3-2+deb8u3 or later
Is CVE-2017-9526 being exploited?
Low — EPSS is 0.7%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 1.7.6-2
- from 0, < 1.6.3-2+deb8u3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.9 | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |