libssh multiple buffer overflows

libssh-multiple-bo (80219) The risk level is classified as HighHigh Risk

Description:

libssh is vulnerable to multiple buffer overflows, caused by improper bounds checking by the ssh_path_expand_tilde() and ssh_path_expand_escape() functions. By sending an overly large string, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application 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 871614: CVE-2012-4560 libssh: multiple buffer overflow flaws.
  • BID-56604: libssh Multiple Buffer Overflow and Denial of Service Vulnerabilities
  • CVE-2012-4560: Multiple buffer overflows in libssh before 0.5.3 allow remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via unspecified vectors.

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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