Vulnerability identifier: #VU11129

Vulnerability risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-6829

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 unauthenticated attacker to obtain potentially sensitive information on the target system.

The weakness exists in the cipher/elgamal.c source code due to insufficient encryption. A remote attacker can access improperly coded plaintexts.

Mitigation
Cybersecurity is currently unaware of any solutions addressing the vulnerability.

Vulnerable software versions

Libgcrypt: 1.7.3 - 1.8.2

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External links
http://github.com/weikengchen/attack-on-libgcrypt-elgamal

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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. However, proof of concept for this vulnerability is available.