Published: 30/11/2012 Updated: 29/08/2017
CVSS v2 Base Score: 6.8 | Impact Score: 6.4 | Exploitability Score: 8.6
VMScore: 605
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P

Vulnerability Summary

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 prior to 0.5.3 allow remote malicious users to cause a denial of service (crash) and possibly execute arbitrary code via unspecified vectors.

Affected Products

Vendor Product Versions
LibsshLibssh0.4.7, 0.4.8, 0.5.0, 0.5.1, 0.5.2

Vendor Advisories

linssh could be made to crash or run programs if it received specially crafted network traffic ...
Multiple vulnerabilities were discovered in libssh by Florian Weimer and Xi Wang: CVE-2012-4559: multiple double free() flaws CVE-2012-4561: multiple invalid free() flaws CVE-2012-4562: multiple improper overflow checks Those could lead to a denial of service by making an SSH client linked to libssh crash, and maybe even arbitrary code exec ...