CVE-2018-16151

Name	CVE-2018-16151
Description	In verify_emsa_pkcs1_signature() in gmp_rsa_public_key.c in the gmp plugin in strongSwan 4.x and 5.x before 5.7.0, the RSA implementation based on GMP does not reject excess data after the encoded algorithm OID during PKCS#1 v1.5 signature verification. Similar to the flaw in the same version of strongSwan regarding digestAlgorithm.parameters, a remote attacker can forge signatures when small public exponents are being used, which could lead to impersonation when only an RSA signature is used for IKEv2 authentication.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-1522-1, DSA-4305-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
strongswan (PTS)	jessie, jessie (lts)	5.2.1-6+deb8u11	fixed
	stretch (security)	5.5.1-4+deb9u6	fixed
	stretch (lts), stretch	5.5.1-4+deb9u7	fixed
	buster (security), buster, buster (lts)	5.7.2-1+deb10u4	fixed
	bullseye (security), bullseye	5.9.1-1+deb11u4	fixed
	bookworm (security), bookworm	5.9.8-5+deb12u1	fixed
	sid, trixie	5.9.13-2	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin
strongswan	source	wheezy	(unfixed)	end-of-life
strongswan	source	jessie	5.2.1-6+deb8u7		DLA-1522-1
strongswan	source	stretch	5.5.1-4+deb9u3		DSA-4305-1
strongswan	source	(unstable)	5.7.0-1

https://strongswan.org/blog/2018/09/24/strongswan-vulnerability-(cve-2018-16151,-cve-2018-16152).html