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. The same attack is believed to work on RSA-2048 with moderately more computation. This side-channel requires that attacker can run arbitrary software on the hardware where the private RSA key is used.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
6.1 MEDIUM
NETWORK
HIGH
NONE
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N
redhatCNA
6.1 MEDIUM
NETWORK
HIGH
NONE
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N
CVEADP
---
---
Base Score
CVSS 3.x
EPSS Score
Percentile: 85%
VendorProductVersion
gnupglibgcrypt
𝑥
< 1.7.8
canonicalubuntu_linux
12.04
canonicalubuntu_linux
14.04
canonicalubuntu_linux
16.04
debiandebian_linux
8.0
debiandebian_linux
9.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
gnupg1
bookworm
1.4.23-1.1
fixed
bullseye
1.4.23-1.1
fixed
stretch
no-dsa
sid
1.4.23-2
fixed
trixie
1.4.23-2
fixed
gnupg2
bullseye (security)
2.2.27-2+deb11u2
fixed
bullseye
2.2.27-2+deb11u2
fixed
stretch
no-dsa
bookworm
2.2.40-1.1
fixed
trixie
2.2.44-1
fixed
sid
2.2.45-2
fixed
libgcrypt20
bullseye
1.8.7-6
fixed
stretch
no-dsa
bookworm
1.10.1-3
fixed
sid
1.11.0-6
fixed
trixie
1.11.0-6
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
gnupg
disco
dne
cosmic
dne
bionic
dne
xenial
Fixed 1.4.20-1ubuntu3.3
released
trusty
Fixed 1.4.16-1ubuntu2.6
released
gnupg1
disco
not-affected
cosmic
not-affected
bionic
not-affected
xenial
dne
trusty
dne
libgcrypt11
disco
dne
cosmic
dne
bionic
dne
artful
dne
zesty
dne
yakkety
dne
xenial
dne
trusty
Fixed 1.5.3-2ubuntu4.5
released
libgcrypt20
disco
not-affected
cosmic
not-affected
bionic
not-affected
artful
not-affected
zesty
Fixed 1.7.6-1ubuntu0.1
released
yakkety
Fixed 1.7.2-2ubuntu1.1
released
xenial
Fixed 1.6.5-2ubuntu0.3
released
trusty
dne
Common Weakness Enumeration
References
http://www.securityfocus.com/bid/99338
http://www.securitytracker.com/id/1038915
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7526
https://eprint.iacr.org/2017/627
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=78130828e9a140a9de4dafadbc844dbb64cb709a
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=8725c99ffa41778f382ca97233183bcd687bb0ce
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=e6a3dc9900433bbc8ad362a595a3837318c28fa9
https://lists.gnupg.org/pipermail/gnupg-announce/2017q2/000408.html
https://usn.ubuntu.com/3733-1/
https://usn.ubuntu.com/3733-2/
https://www.debian.org/security/2017/dsa-3901
https://www.debian.org/security/2017/dsa-3960
http://www.securityfocus.com/bid/99338
http://www.securitytracker.com/id/1038915
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7526
https://eprint.iacr.org/2017/627
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=78130828e9a140a9de4dafadbc844dbb64cb709a
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=8725c99ffa41778f382ca97233183bcd687bb0ce
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=e6a3dc9900433bbc8ad362a595a3837318c28fa9
https://lists.gnupg.org/pipermail/gnupg-announce/2017q2/000408.html
https://usn.ubuntu.com/3733-1/
https://usn.ubuntu.com/3733-2/
https://www.debian.org/security/2017/dsa-3901
https://www.debian.org/security/2017/dsa-3960