Vulnerability Details : CVE-2017-9526
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.
Vulnerability category: Information leak
Exploit prediction scoring system (EPSS) score for CVE-2017-9526
Probability of exploitation activity in the next 30 days: 0.39%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 70 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2017-9526
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|
|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:N/A:N |
8.6
|
2.9
|
[email protected] |
|
5.9
|
MEDIUM | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
2.2
|
3.6
|
[email protected] |
CWE ids for CVE-2017-9526
-
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.Assigned by: [email protected] (Primary)
References for CVE-2017-9526
-
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=commit;h=f9494b3f258e01b6af8bd3941ce436bcc00afc56
Issue Tracking;Patch;Third Party Advisory
-
http://www.debian.org/security/2017/dsa-3880
-
https://bugzilla.suse.com/show_bug.cgi?id=1042326
Issue Tracking;Patch
- https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html
- http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
-
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=commit;h=5a22de904a0a366ae79f03ff1e13a1232a89e26b
Issue Tracking;Patch;Third Party Advisory
-
http://www.securityfocus.com/bid/99046
Third Party Advisory;VDB Entry
Products affected by CVE-2017-9526
- cpe:2.3:a:gnupg:libgcrypt:*:*:*:*:*:*:*:*