CVE-2012-4559

Name	CVE-2012-4559
Description	Multiple double free vulnerabilities in the (1) agent_sign_data function in agent.c, (2) channel_request function in channels.c, (3) ssh_userauth_pubkey function in auth.c, (4) sftp_parse_attr_3 function in sftp.c, and (5) try_publickey_from_file function in keyfiles.c in libssh before 0.5.3 allow remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via unspecified vectors.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DSA-2577-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libssh (PTS)	jessie, jessie (lts)	0.6.3-4+deb8u6	fixed
	stretch (security)	0.7.3-2+deb9u3	fixed
	stretch (lts), stretch	0.7.3-2+deb9u4	fixed
	buster (security), buster, buster (lts)	0.8.7-1+deb10u2	fixed
	bullseye (security), bullseye	0.9.8-0+deb11u1	fixed
	bookworm (security), bookworm	0.10.6-0+deb12u1	fixed
	sid, trixie	0.11.1-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
libssh	source	squeeze	0.4.5-3+squeeze1		DSA-2577-1
libssh	source	(unstable)	0.5.3-1