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CVE-2016-2849

Published: 13 May 2016

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.

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
botan1.10
Launchpad, Ubuntu, Debian
artful Not vulnerable
(1.10.13-1)
bionic Not vulnerable
(1.10.13-1)
cosmic Not vulnerable
(1.10.13-1)
disco Does not exist

eoan Does not exist

focal Does not exist

precise Ignored
(end of life)
trusty
Released (1.10.5-1+deb7u1ubuntu0.14.04.1)
upstream
Released (1.10.13-1)
wily Ignored
(end of life)
yakkety Ignored
(end of life)
zesty Ignored
(end of life)
groovy Does not exist

jammy Does not exist

xenial Needed

hirsute Does not exist

impish Does not exist

mantic Does not exist

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N