Input validation error in OpenLDAP
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2015-6908 |
| CWE-ID | CWE-20 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
OpenLDAP Server applications / Directory software, identity management |
| Vendor | OpenLDAP.org |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Input validation error
EUVDB-ID: #VU33285
Risk: Medium
CVSSv3.1: 4.6 [CVSS:3.1/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]
CVE-ID: CVE-2015-6908
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe 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.
MitigationInstall update from vendor's website.
Vulnerable software versionsOpenLDAP: 2.4.3 - 2.4.42
External linkshttp://lists.apple.com/archives/security-announce/2015/Dec/msg00005.html
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00031.html
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00032.html
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00037.html
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00039.html
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00040.html
http://rhn.redhat.com/errata/RHSA-2015-1840.html
http://www.debian.org/security/2015/dsa-3356
http://www.openldap.org/devel/gitweb.cgi?p=openldap.git;a=commit;h=6fe51a9ab04fd28bbc171da3cf12f1c1040d6629
http://www.openldap.org/its/index.cgi/Software%20Bugs?id=8240
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
http://www.security-assessment.com/files/documents/advisory/OpenLDAP-ber_get_next-Denial-of-Service.pdf
http://www.securityfocus.com/bid/76714
http://www.securitytracker.com/id/1033534
http://www.ubuntu.com/usn/USN-2742-1
http://support.apple.com/HT205637
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
