#VU15668 Information disclosure in OpenSSL - CVE-2018-0734

Vulnerability identifier: #VU15668

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-0734

CWE-ID: CWE-200

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
OpenSSL
Server applications / Encryption software

Vendor: OpenSSL Software Foundation

Description

The vulnerability allows a local attacker to obtain potentially sensitive information.

The vulnerability exists due to unspecified flaw in Digital Signature Algorithm (DSA). A local attacker can conduct a timing side-channel attack and recover the private key, which could be used to conduct further attacks.

Mitigation
The vulnerability has been fixed in the versions 1.0.2q, 1.1.0j, 1.1.1a.

Vulnerable software versions

OpenSSL: 1.0.2h - 1.0.2p, 1.1.0d - 1.1.0, 1.1.1

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External links
https://www.openssl.org/news/secadv/20181030.txt

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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