CVE-2017-9526
mediumpriority · track · 25EPSS 0.023 · 84 %ileEUUSEPSS · scored 2026-10-28
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
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
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references (17)
External citations — patches, advisories, analysis.
- https://bugzilla.suse.com/show_bug.cgi?id=1042326cnnvd
- https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=commit;h=5a22de904a0a366ae79f03ff1e13a1232a89e26bcnnvd
- https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=commit;h=f9494b3f258e01b6af8bd3941ce436bcc00afc56cnnvd
- http://www.debian.org/security/2017/dsa-3880enisa_euvd
- http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.htmlenisa_euvd
- http://www.securityfocus.com/bid/99046enisa_euvd
- https://bugzilla.suse.com/show_bug.cgi?id=1042326enisa_euvd
- https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=5a22de904a0a366ae79f03ff1e13a1232a89e26benisa_euvd
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