libgcrypt before version 1.7.8 is vulnerable to a cache side-channel...
Vulnerability 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. 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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
- https://usn.ubuntu.com/3733-1/
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7526
- http://www.securitytracker.com/id/1038915
- https://www.debian.org/security/2017/dsa-3960
- https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=78130828e9a140a9de4dafadbc844dbb64cb709a
- https://www.debian.org/security/2017/dsa-3901
- https://usn.ubuntu.com/3733-2/
- https://eprint.iacr.org/2017/627
- http://www.securityfocus.com/bid/99338
- https://lists.gnupg.org/pipermail/gnupg-announce/2017q2/000408.html
- https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=e6a3dc9900433bbc8ad362a595a3837318c28fa9
- https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=8725c99ffa41778f382ca97233183bcd687bb0ce
Affected Vendor
GnuPG
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