CVE-2017-9526
MEDIUM5.9EPSS 0.65%libgcrypt20 - security update
Published: 6/11/2017Modified: 4/28/2026
Also known as:DEBIAN-CVE-2017-9526
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.
Affected packages (2)
- Debian/libgcrypt20from 0, < 1.7.6-2
- Debian/libgcrypt20from 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 |