#VU45194 Permissions, Privileges, and Access Controls in OpenLDAP - CVE-2011-1024
Vulnerability identifier: #VU45194
Vulnerability risk: Low
CVSSv4.0: 0.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2011-1024
CWE-ID:
CWE-264
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
OpenLDAP
Server applications /
Directory software, identity management
Vendor: OpenLDAP.org
Description
The vulnerability allows a remote #AU# to read and manipulate data.
chain.c in back-ldap in OpenLDAP 2.4.x before 2.4.24, when a master-slave configuration with a chain overlay and ppolicy_forward_updates (aka authentication-failure forwarding) is used, allows remote authenticated users to bypass external-program authentication by sending an invalid password to a slave server.
Mitigation
Install update from vendor's website.
Vulnerable software versions
OpenLDAP: 2.4.6 - 2.4.23
External links
https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10705
https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10735
https://openwall.com/lists/oss-security/2011/02/24/12
https://openwall.com/lists/oss-security/2011/02/25/13
https://secunia.com/advisories/43331
https://secunia.com/advisories/43708
https://secunia.com/advisories/43718
https://security.gentoo.org/glsa/glsa-201406-36.xml
https://securitytracker.com/id?1025188
https://www.mandriva.com/security/advisories?name=MDVSA-2011:055
https://www.mandriva.com/security/advisories?name=MDVSA-2011:056
https://www.openldap.org/devel/cvsweb.cgi/servers/slapd/back-ldap/chain.c.diff?r1=1.76&r2=1.77&hideattic=1&sortbydate=0
https://www.openldap.org/its/index.cgi/Software%20Bugs?id=6607
https://www.openldap.org/lists/openldap-announce/201102/msg00000.html
https://www.openldap.org/lists/openldap-technical/201004/msg00247.html
https://www.redhat.com/support/errata/RHSA-2011-0346.html
https://www.redhat.com/support/errata/RHSA-2011-0347.html
https://www.ubuntu.com/usn/USN-1100-1
https://www.vupen.com/english/advisories/2011/0665
https://bugzilla.novell.com/show_bug.cgi?id=674985
https://bugzilla.redhat.com/show_bug.cgi?id=680466
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
