Information disclosure in Fedoraproject products - CVE-2016-2849
Published: May 13, 2016 / Updated: August 9, 2020
Vulnerability identifier: #VU40297
CSH Severity: Medium
CVSS v4: 8.7 [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]
CVE-ID: CVE-2016-2849
CWE-ID: CWE-200
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.
Botan before 1.10.13 and 1.11.x before 1.11.29 do not use a constant-time algorithm to perform a modular inverse on the signature nonce k, which might allow remote attackers to obtain ECDSA secret keys via a timing side-channel attack.
Affected software
Botan
Debian Linux
Fedora
Gentoo Linux
botan
Debian Linux
Fedora
Gentoo Linux
botan
How to mitigate CVE-2016-2849
Install update from vendor's website.
botan - addressed in versions 1.10.13-1.el7, 1.10.13-1.fc22, 1.10.13-1.fc23, 1.10.13-1.fc24