libssh code execution

libssh-code-execution (80218) The risk level is classified as HighHigh Risk

Description:

libssh could allow a remote attacker to execute arbitrary code on the system, caused by multiple double-free errors. A remote attacker could exploit this vulnerability to execute arbitrary code on the system or cause the process to crash.

*CVSS:

Base Score: 7.5
  Access Vector: Network
  Access Complexity: Low
  Authentication: None
  Confidentiality Impact: Partial
  Integrity Impact: Partial
  Availability Impact: Partial
 
Temporal Score: 5.5
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Gain Access

Remedy:

Upgrade to the latest version of libssh (0.5.3 or later), available from the libssh Web site. See References.

References:

  • libssh Web site: libssh.
  • Red Hat Bugzilla Bug 871612: CVE-2012-4559 libssh: multiple double free() flaws.
  • BID-56604: libssh Multiple Buffer Overflow and Denial of Service Vulnerabilities
  • 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.
  • DSA-2577: libssh -- several vulnerabilities

Platforms Affected:

  • libssh libssh 0.5.2

Reported:

Nov 20, 2012

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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