#VU15568 Information disclosure in OpenSSL - CVE-2018-0735

Vulnerability identifier: #VU15568

Vulnerability risk: Low

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:Clear]

CVE-ID: CVE-2018-0735

CWE-ID: CWE-200

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
OpenSSL
Server applications / Encryption software

Vendor: OpenSSL Software Foundation

Description

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

The vulnerability exists due to disclosure of the OpenSSL ECDSA signature algorithm. A remote attacker can use variations in the signing algorithm to conduct a timing side channel attack and recover the private key.

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

Vulnerable software versions

OpenSSL: 1.1.0i - 1.1.0, 1.1.1

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External links
https://www.openssl.org/news/secadv/20181029.txt

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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.