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gentooGentoo FoundationGLSA-200711-33
HistoryNov 25, 2007 - 12:00 a.m.

nss_ldap: Information disclosure

2007-11-2500:00:00
Gentoo Foundation
security.gentoo.org
13

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:M/Au:N/C:P/I:N/A:N

EPSS

0.011

Percentile

84.7%

Background

nss_ldap is a Name Service Switch module which allows ‘passwd’, ‘group’ and ‘host’ database information to be pulled from LDAP.

Description

Josh Burley reported that nss_ldap does not properly handle the LDAP connections due to a race condition that can be triggered by multi-threaded applications using nss_ldap, which might lead to requested data being returned to a wrong process.

Impact

Remote attackers could exploit this race condition by sending queries to a vulnerable server using nss_ldap, possibly leading to theft of user credentials or information disclosure (e.g. Dovecot returning wrong mailbox contents).

Workaround

There is no known workaround at this time.

Resolution

All nss_ldap users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=sys-auth/nss_ldap-258"
OSVersionArchitecturePackageVersionFilename
Gentooanyallsys-auth/nss_ldap< 258UNKNOWN

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:M/Au:N/C:P/I:N/A:N

EPSS

0.011

Percentile

84.7%