SB2017083008 - Information disclosure in GNU Libgcrypt
Published: August 30, 2017 Updated: July 28, 2020
Security Bulletin ID
SB2017083008
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Information disclosure (CVE-ID: CVE-2017-0379)
CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.
Libgcrypt before 1.8.1 does not properly consider Curve25519 side-channel attacks, which makes it easier for attackers to discover a secret key, related to cipher/ecc.c and mpi/ec.c.
Remediation
Install update from vendor's website.
References
- http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
- http://www.securityfocus.com/bid/100503
- http://www.securitytracker.com/id/1041294
- https://bugs.debian.org/873383
- https://eprint.iacr.org/2017/806
- https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=commit;h=da780c8183cccc8f533c8ace8211ac2cb2bdee7b
- https://lists.debian.org/debian-security-announce/2017/msg00221.html
- https://security.netapp.com/advisory/ntap-20180726-0002/
- https://security-tracker.debian.org/tracker/CVE-2017-0379
- https://www.debian.org/security/2017/dsa-3959
- https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html