#VU32070 Information disclosure in Libgcrypt - CVE-2017-0379

Vulnerability identifier: #VU32070

Vulnerability risk: Medium

CVSSv4.0: 6.6 [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]

CVE-ID: CVE-2017-0379

CWE-ID: CWE-200

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Libgcrypt
Client/Desktop applications / Encryption software

Vendor: GNU

Description

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.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Libgcrypt: 1.8.0

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External links
https://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
https://www.securityfocus.com/bid/100503
https://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

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.