CVE-2017-7526
libgcrypt before version 1.7.8 is vulnerable to a cache side-channel attack resulting into a complete break of RSA-1024 while using the left-to-right method for computing the sliding-window expansion.
02 Description
libgcrypt before version 1.7.8 is vulnerable to a cache side-channel attack resulting into a complete break of RSA-1024 while using the left-to-right method for computing the sliding-window expansion.
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 3.83% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 89.7% of scored records. A rank, not a probability.
- NVD base score
- 6.8 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2018-07-26 13:00Z8 YR AGO
- Last updated
- 2025-12-17 22:06Z10 MO AGO
- Reserved
- 2017-04-05
- Assigning CNA
- redhat
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 6.1)
- CNA CVSS vector
- CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N
- Weaknesses
- Data version
- 5.2
- Document digest
- f807f2d3ff72e09780150cf6cd32c3b9cc4ebb6b60276e169eca65a545f3f625
05 Affected products
06 References
- usn.ubuntu.comUSN-3733-1https://usn.ubuntu.com/3733-1/
- bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7526
- www.securitytracker.com1038915http://www.securitytracker.com/id/1038915
- www.debian.orgDSA-3960https://www.debian.org/security/2017/dsa-3960
- git.gnupg.orghttps://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=78130828e9a140a9de4dafadbc844dbb64cb709a
- www.debian.orgDSA-3901https://www.debian.org/security/2017/dsa-3901
- usn.ubuntu.comUSN-3733-2https://usn.ubuntu.com/3733-2/
- eprint.iacr.orghttps://eprint.iacr.org/2017/627
- www.securityfocus.com99338http://www.securityfocus.com/bid/99338
- lists.gnupg.org[gnupg-announce] 20170629 Libgcrypt 1.7.8 released to fix CVE-2017-7526https://lists.gnupg.org/pipermail/gnupg-announce/2017q2/000408.html
- git.gnupg.orghttps://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=e6a3dc9900433bbc8ad362a595a3837318c28fa9
- git.gnupg.orghttps://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=8725c99ffa41778f382ca97233183bcd687bb0ce
07 Fixed in
Arch Linux
- libgcrypt Fixed in 1.7.8-1
Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.
Debian 12
- gnupg1 Fixed in 1.4.22-1
- libgcrypt20 Fixed in 1.7.8-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- gnupg1 Fixed in 1.4.22-1
- libgcrypt20 Fixed in 1.7.8-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- gnupg1 Fixed in 1.4.22-1
- libgcrypt20 Fixed in 1.7.8-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 14.04 LTS
- gnupg Fixed in 1.4.16-1ubuntu2.6
- libgcrypt11 Fixed in 1.5.3-2ubuntu4.5
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- gnupg Fixed in 1.4.20-1ubuntu3.3
- libgcrypt20 Fixed in 1.6.5-2ubuntu0.3
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.