CVE-2017-9526

Description

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.

Category

5.9
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.39%
Vendor Advisory debian.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=5a22de904a0a366ae79f03ff1e13a1232a89e26b
http://www.debian.org/security/2017/dsa-3880 vendor advisory
http://www.securityfocus.com/bid/99046 vdb entry third party advisory
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=f9494b3f258e01b6af8bd3941ce436bcc00afc56
https://bugzilla.suse.com/show_bug.cgi?id=1042326 issue tracking patch

Frequently Asked Questions

What is the severity of CVE-2017-9526?
CVE-2017-9526 has been scored as a medium severity vulnerability.
How to fix CVE-2017-9526?
To fix CVE-2017-9526, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-9526 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2017-9526 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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