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.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Libssh | Libssh | * | 0.5.2 (including) |
| Libssh | Libssh | 0.4.7 (including) | 0.4.7 (including) |
| Libssh | Libssh | 0.4.8 (including) | 0.4.8 (including) |
| Libssh | Libssh | 0.5.0 (including) | 0.5.0 (including) |
| Libssh | Libssh | 0.5.0-rc1 (including) | 0.5.0-rc1 (including) |
| Libssh | Libssh | 0.5.1 (including) | 0.5.1 (including) |
| Libssh | Ubuntu | hardy | * |
| Libssh | Ubuntu | lucid | * |
| Libssh | Ubuntu | oneiric | * |
| Libssh | Ubuntu | precise | * |
| Libssh | Ubuntu | quantal | * |
| Libssh | Ubuntu | upstream | * |