CVE-2018-12435

Name	CVE-2018-12435
Description	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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	901619

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
botan (PTS)	bullseye	2.17.3+dfsg-2	fixed
	bookworm	2.19.3+dfsg-1+deb12u1	fixed
	forky, sid, trixie	2.19.5+dfsg-4	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
botan	source	(unstable)	2.6.0-3			901619
botan1.10	source	(unstable)	(not affected)

Notes

- botan1.10 <not-affected> (Issue introduced in 2.5.0)
https://github.com/randombit/botan/pull/1604
https://github.com/randombit/botan/commit/48fc8df51d99f9d8ba251219367b3d629cc848e3