Information Exposure Affecting libgcrypt package, versions <1.7.8-r0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-ALPINE35-LIBGCRYPT-467951
- published22 Sept 2019
- disclosed22 Sept 2019
- creditUnknown
Introduced: 22 Sep 2019
CVE-2017-9526 (opens in a new tab)How to fix?
Upgrade Alpine:3.5 libgcrypt to version 1.7.8-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libgcrypt package and not the libgcrypt package as distributed by Alpine.
See How to fix? for Alpine:3.5 relevant fixed versions and status.
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.
References
- https://bugzilla.suse.com/show_bug.cgi?id=1042326
- https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=commit;h=5a22de904a0a366ae79f03ff1e13a1232a89e26b
- https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=commit;h=f9494b3f258e01b6af8bd3941ce436bcc00afc56
- http://www.debian.org/security/2017/dsa-3880
- https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html
- http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
- http://www.securityfocus.com/bid/99046