CVE-2017-9526 Information disclosure in n/a
An attacker observing side-channels during EdDSA signing can recover the long-term secret key from Libgcrypt.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2017-9526?
CVE-2017-9526 is a medium-severity vulnerability in n/a, published on 11 Jun 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-200
Which versions are affected by CVE-2017-9526?
It affects 1 product.
Linux distribution packages (5)
libgcrypt SUSE:Linux Enterprise Desktop 12 SP2 | All versions | 1.6.1-16.39.1 |
libgcrypt SUSE:Linux Enterprise Server 12 SP2 | All versions | 1.6.1-16.39.1 |
libgcrypt SUSE:Linux Enterprise Server for Raspberry Pi 12 SP2 | All versions | 1.6.1-16.39.1 |
libgcrypt SUSE:Linux Enterprise Server for SAP Applications 12 SP2 | All versions | 1.6.1-16.39.1 |
libgcrypt SUSE:Linux Enterprise Software Development Kit 12 SP2 | All versions | 1.6.1-16.39.1 |
Products include Gnupg Libgcrypt.
How do I fix CVE-2017-9526?
Upgrade to a fixed version.
Is CVE-2017-9526 being exploited?
There is no known exploitation of CVE-2017-9526 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2017-9526, DSA-3880-1, GHSA-665h-28h9-qh6v, SUSE-SU-2017:1608-1, UBUNTU-CVE-2017-9526.