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CVE-2018-12435

Published: 15 June 2018

Botan 2.5.0 through 2.6.0 before 2.7.0 allows a memory-cache side-channel attack on ECDSA signatures, aka the Return Of the Hidden Number Problem or ROHNP, related to dsa/dsa.cpp, ec_group/ec_group.cpp, and ecdsa/ecdsa.cpp. To discover an ECDSA key, the attacker needs access to either the local machine or a different virtual machine on the same physical host.

Notes

AuthorNote
msalvatore
From the release notes, "versions before 2.5.0 are not affected"

Priority

Medium

Cvss 3 Severity Score

5.9

Score breakdown

Status

Package Release Status
botan
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Not vulnerable
(code not present)
cosmic Not vulnerable
(2.6.0-3)
disco Not vulnerable
(2.6.0-3)
eoan Not vulnerable
(2.6.0-3)
trusty Does not exist

upstream
Released (2.6.0-3)
xenial Does not exist

Patches:
upstream: https://github.com/randombit/botan/commit/48fc8df51d99f9d8ba251219367b3d629cc848e3
botan1.10
Launchpad, Ubuntu, Debian
artful Ignored
(end of life)
bionic Not vulnerable
(code not present)
cosmic Ignored
(end of life)
disco Does not exist

eoan Does not exist

upstream Not vulnerable
(debian: Issue introduced in 2.5.0)
xenial Not vulnerable
(code not present)
trusty Not vulnerable
(code not present)

Severity score breakdown

Parameter Value
Base score 5.9
Attack vector Local
Attack complexity High
Privileges required None
User interaction None
Scope Changed
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N