CVE-2017-9526: gnupg libgcrypt
CVSS: 5.9v3.0MediumModified
AliasesSUSE-SU-2017:1608-1UBUNTU-CVE-2017-9526DEBIAN-CVE-2017-9526DSA-3880-1
Published 11-06-2017Last modified 05-08-2024
Vulnerability summary
CVE-2017-9526 is a medium (CVSS 5.9) vulnerability in gnupg libgcrypt. EPSS estimates a 2.34% chance of exploitation in the next 30 days, higher than 83.3% of scored vulnerabilities.
CVSS score
5.9/10
010
Medium · v3.0 (NVD)EPSS score
2.34%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 1 · Related 1Timeline
- 11-06-2017PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
4 scores · 3 sources · 2 versionsMedium 5.9Preferred score · NVD (NIST)
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:NSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated5.9MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- OSV · DebianEcosystem advisory · calculated5.9MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Medium 4.3Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:P/I:N/A:NSourcesSingle source
EPSS trend
Probability
2.34%
Chance of exploitation in the next 30 days
Percentile
83%
Versus all other CVEs
30-day change
0.00 pp
From 2.34% on 18-09-2026
18-09-202618-10-2026
EPSS score2.34%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Suse5 products
- libgcrypt&distro=SUSE Linux Enterprise Desktop 12 SP2< 1.6.1-16.39.1
- libgcrypt&distro=SUSE Linux Enterprise Server 12 SP2< 1.6.1-16.39.1
- libgcrypt&distro=SUSE Linux Enterprise Server for Raspberry Pi 12 SP2< 1.6.1-16.39.1
- libgcrypt&distro=SUSE Linux Enterprise Server for SAP Applications 12 SP2< 1.6.1-16.39.1
- libgcrypt&distro=SUSE Linux Enterprise Software Development Kit 12 SP2< 1.6.1-16.39.1
Debian1 product
- libgcrypt20< 1.7.6-2 | < 1.6.3-2+deb8u3
Gnupg1 product
- libgcrypt≤ 1.7.6
Ubuntu1 product
- libgcrypt20< 1.6.5-2ubuntu0.3
4 vendors · 8 products
References
15 links- www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.htmlX Refsource CONFIRM
- www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.htmlX Refsource CONFIRM
- git.gnupg.org/cgi-bin/…X Refsource CONFIRM
- git.gnupg.org/cgi-bin/…X Refsource CONFIRM
- bugzilla.suse.com/931932REPORT