Vulnerability identifier: #VU33285
Vulnerability risk: Medium
CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID:
CWE-ID:
CWE-20
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
OpenLDAP
Server applications /
Directory software, identity management
Vendor: OpenLDAP.org
Description
The vulnerability allows a remote non-authenticated attacker to perform service disruption.
The ber_get_next function in libraries/liblber/io.c in OpenLDAP 2.4.42 and earlier allows remote attackers to cause a denial of service (reachable assertion and application crash) via crafted BER data, as demonstrated by an attack against slapd.
Mitigation
Install update from vendor's website.
Vulnerable software versions
OpenLDAP: 2.4.3 - 2.4.42
External links
https://lists.apple.com/archives/security-announce/2015/Dec/msg00005.html
https://lists.opensuse.org/opensuse-security-announce/2016-01/msg00031.html
https://lists.opensuse.org/opensuse-security-announce/2016-01/msg00032.html
https://lists.opensuse.org/opensuse-security-announce/2016-01/msg00037.html
https://lists.opensuse.org/opensuse-security-announce/2016-01/msg00039.html
https://lists.opensuse.org/opensuse-security-announce/2016-01/msg00040.html
https://rhn.redhat.com/errata/RHSA-2015-1840.html
https://www.debian.org/security/2015/dsa-3356
https://www.openldap.org/devel/gitweb.cgi?p=openldap.git;a=commit;h=6fe51a9ab04fd28bbc171da3cf12f1c1040d6629
https://www.openldap.org/its/index.cgi/Software%20Bugs?id=8240
https://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
https://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
https://www.security-assessment.com/files/documents/advisory/OpenLDAP-ber_get_next-Denial-of-Service.pdf
https://www.securityfocus.com/bid/76714
https://www.securitytracker.com/id/1033534
https://www.ubuntu.com/usn/USN-2742-1
https://support.apple.com/HT205637
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.