nss-pam-ldapd FD_SETSIZE buffer overflow

nsspamldapd-fdsetsize-bo (82175) The risk level is classified as HighHigh Risk

Description:

nss-pam-ldapd is vulnerable to a stack-based buffer overflow, caused by an array indexing error when handling FD_SETSIZE macro. 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 nss-pam-ldapd (0.7.18 or 0.8.11 or later), available from the Arthur de Jong Web site. See References.

References:

  • Arthur de Jong Web page: nss-pam-ldapd: NSS and PAM modules for lookups using LDAP.
  • Red Hat Bugzilla Bug 909119: CVE-2013-0288 nss-pam-ldapd: FD_SET array index error, leading to stack-based buffer overflow.
  • BID-58007: nss-pam-ldapd 'FD_SET()' Function Stack Buffer Overflow Vulnerability
  • CVE-2013-0288: nss-pam-ldapd before 0.7.18 and 0.8.x before 0.8.11 allows context-dependent attackers to cause a denial of service (application crash) and possibly execute arbitrary code by performing a name lookup on an application with a large number of open file descriptors, which triggers a stack-based buffer overflow related to incorrect use of the FD_SET macro.
  • DSA-2628: nss-pam-ldapd -- buffer overflow
  • RHSA-2013-0590: Important: nss-pam-ldapd security update
  • SA52212: nss-pam-ldapd File Descriptor Handling Buffer Overflow Vulnerability

Platforms Affected:

  • Arthur de Jong nss-pam-ldapd 0.7.17
  • Arthur de Jong nss-pam-ldapd 0.8.10
  • RedHat Enterprise Linux 6 Server
  • RedHat Enterprise Linux 6 Workstation
  • RedHat Enterprise Linux Desktop 6
  • RedHat Enterprise Linux HPC Node 6

Reported:

Feb 19, 2013

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