RHEL 2.1 : nss_ldap (RHSA-2002:180)
High Nessus Plugin ID 12321
SynopsisThe remote Red Hat host is missing a security update.
DescriptionUpdated nss_ldap packages are now available for Red Hat Linux Advanced Server 2.1. These updates fix a potential buffer overflow which can occur when nss_ldap is set to configure itself using information stored in DNS as well as a format string bug in logging functions used in pam_ldap.
[Updated 09 Jan 2003] Added fixed packages for the Itanium (IA64) architecture.
[Updated 06 Feb 2003] Added fixed packages for Advanced Workstation 2.1
nss_ldap is a set of C library extensions that allow X.500 and LDAP directory servers to be used as a primary source of aliases, ethers, groups, hosts, networks, protocols, users, RPCs, services, and shadow passwords (instead of or in addition to using flat files or NIS).
When versions of nss_ldap prior to nss_ldap-198 are configured without a value for the 'host' setting, nss_ldap will attempt to configure itself by using SRV records stored in DNS. When parsing the results of the DNS query, nss_ldap does not check that data returned by the server will fit into an internal buffer, leaving it vulnerable to a buffer overflow The Common Vulnerabilities and Exposures project has assigned the name CVE-2002-0825 to this issue.
When versions of nss_ldap prior to nss_ldap-199 are configured without a value for the 'host' setting, nss_ldap will attempt to configure itself by using SRV records stored in DNS. When parsing the results of the DNS query, nss_ldap does not check that the data returned has not been truncated by the resolver libraries to avoid a buffer overflow, and may attempt to parse more data than is actually available, leaving it vulnerable to a read buffer overflow.
Versions of pam_ldap prior to version 144 include a format string bug in the logging function. The packages included in this erratum update pam_ldap to version 144, fixing this bug. The Common Vulnerabilities and Exposures project has assigned the name CVE-2002-0374 to this issue.
All users of nss_ldap should update to these errata packages which are not vulnerable to the above issues. These packages are based on nss_ldap-189 with the addition of a backported security patch and pam_ldap version 144.
Thanks to the nss_ldap and pam_ldap team at padl.com for providing information about these issues.
SolutionUpdate the affected nss_ldap package.