CVE-2012-4559

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.

Bugs

• <https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2012-4559&gt;