Security
Security
pam_ldap and nss_ldap fail to restart TLS when following a referral, possibly leading to credentials being sent in plain text.
| Package | sys-auth/nss_ldap on all architectures |
|---|---|
| Affected versions | < 239-r1 |
| Unaffected versions | >= 239-r1 revision >= 226-r1 |
| Package | sys-auth/pam_ldap on all architectures |
|---|---|
| Affected versions | < 178-r1 |
| Unaffected versions | >= 178-r1 |
pam_ldap is a Pluggable Authentication Module which allows authentication against an LDAP directory. nss_ldap is a Name Service Switch module which allows 'passwd', 'group' and 'host' database information to be pulled from LDAP. TLS is Transport Layer Security, a protocol that allows encryption of network communications.
Rob Holland of the Gentoo Security Audit Team discovered that pam_ldap and nss_ldap fail to use TLS for referred connections if they are referred to a master after connecting to a slave, regardless of the "ssl start_tls" ldap.conf setting.
An attacker could sniff passwords or other sensitive information as the communication is not encrypted.
pam_ldap and nss_ldap can be set to force the use of SSL instead of TLS.
All pam_ldap users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=sys-auth/pam_ldap-178-r1"
All nss_ldap users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose sys-auth/nss_ldap
Release date
July 14, 2005
Latest revision
July 14, 2005: 01
Severity
normal
Exploitable
remote
Bugzilla entries