Information disclosure in GNU Libgcrypt

1) Information disclosure

EUVDB-ID: #VU32337

Risk: Low

CVSSv4.0: 0.1 [CVSS:4.0/AV:P/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2015-7511

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

Exploit availability: No

Description

The vulnerability allows a local non-authenticated attacker to gain access to sensitive information.

Libgcrypt before 1.6.5 does not properly perform elliptic-point curve multiplication during decryption, which makes it easier for physically proximate attackers to extract ECDH keys by measuring electromagnetic emanations.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Libgcrypt: 1.6.0 - 1.6.4

CPE2.3

• cpe:2.3:a:gnu:libgcrypt:1.6.0:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:libgcrypt:1.6.1:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:libgcrypt:1.6.2:*:*:*:*:*:*:*

External links

https://lists.opensuse.org/opensuse-updates/2016-05/msg00027.html
https://www.cs.tau.ac.IL/~tromer/ecdh/
https://www.debian.org/security/2016/dsa-3474
https://www.debian.org/security/2016/dsa-3478
https://www.securityfocus.com/bid/83253
https://www.ubuntu.com/usn/USN-2896-1
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/W2IL4PAEICHGA2XMQYRY3MIWHM4GMPAG/
https://lists.gnupg.org/pipermail/gnupg-announce/2016q1/000384.html
https://security.gentoo.org/glsa/201610-04

Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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