CVE-2016-2849 Information

Description

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.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Reference

http://botan.randombit.net/security.html http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183669.html http://marc.info/?l=botan-devel&m=146185420505943&w=2 http://www.debian.org/security/2016/dsa-3565 https://security.gentoo.org/glsa/201701-23

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

7.5