CVE-2015-6908 Denial of service in n/a

Medium 5.0 Published Updated

Remote attackers can crash the OpenLDAP server by sending crafted BER data, causing a denial of service.

Exploited in the wild
Not known
Login needed
Not needed
Attackable
Over the internet
Victim action needed
Not needed
Fix
Available

What is CVE-2015-6908?

CVE-2015-6908 is a medium-severity denial of service vulnerability in Apple Mac Os X, published on 11 Sep 2015. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-20

Which versions are affected by CVE-2015-6908?

It affects 2 products.

Linux distribution packages (40)
compat-openldap Red Hat:enterprise_linux:5::clientAll versions0:2.3.43_2.2.29-29.el5_11
openldap Red Hat:enterprise_linux:5::clientAll versions0:2.3.43-29.el5_11
openldap-clients Red Hat:enterprise_linux:5::clientAll versions0:2.3.43-29.el5_11
openldap-debuginfo Red Hat:enterprise_linux:5::clientAll versions0:2.3.43-29.el5_11
openldap Red Hat:enterprise_linux:5::client_workstationAll versions0:2.3.43-29.el5_11
openldap-debuginfo Red Hat:enterprise_linux:5::client_workstationAll versions0:2.3.43-29.el5_11
openldap-devel Red Hat:enterprise_linux:5::client_workstationAll versions0:2.3.43-29.el5_11
openldap-servers Red Hat:enterprise_linux:5::client_workstationAll versions0:2.3.43-29.el5_11
openldap-servers-overlays Red Hat:enterprise_linux:5::client_workstationAll versions0:2.3.43-29.el5_11
openldap-servers-sql Red Hat:enterprise_linux:5::client_workstationAll versions0:2.3.43-29.el5_11
compat-openldap Red Hat:enterprise_linux:5::serverAll versions0:2.3.43_2.2.29-29.el5_11
openldap Red Hat:enterprise_linux:5::serverAll versions0:2.3.43-29.el5_11
openldap-clients Red Hat:enterprise_linux:5::serverAll versions0:2.3.43-29.el5_11
openldap-debuginfo Red Hat:enterprise_linux:5::serverAll versions0:2.3.43-29.el5_11
openldap-devel Red Hat:enterprise_linux:5::serverAll versions0:2.3.43-29.el5_11
openldap-servers Red Hat:enterprise_linux:5::serverAll versions0:2.3.43-29.el5_11
openldap-servers-overlays Red Hat:enterprise_linux:5::serverAll versions0:2.3.43-29.el5_11
openldap-servers-sql Red Hat:enterprise_linux:5::serverAll versions0:2.3.43-29.el5_11
openldap Red Hat:enterprise_linux:6::clientAll versions0:2.4.40-6.el6_7
openldap-clients Red Hat:enterprise_linux:6::clientAll versions0:2.4.40-6.el6_7
openldap-debuginfo Red Hat:enterprise_linux:6::clientAll versions0:2.4.40-6.el6_7
openldap-devel Red Hat:enterprise_linux:6::clientAll versions0:2.4.40-6.el6_7
openldap-servers Red Hat:enterprise_linux:6::clientAll versions0:2.4.40-6.el6_7
openldap-servers-sql Red Hat:enterprise_linux:6::clientAll versions0:2.4.40-6.el6_7
openldap Red Hat:enterprise_linux:6::computenodeAll versions0:2.4.40-6.el6_7
openldap-clients Red Hat:enterprise_linux:6::computenodeAll versions0:2.4.40-6.el6_7
openldap-debuginfo Red Hat:enterprise_linux:6::computenodeAll versions0:2.4.40-6.el6_7
openldap-devel Red Hat:enterprise_linux:6::computenodeAll versions0:2.4.40-6.el6_7
openldap-servers Red Hat:enterprise_linux:6::computenodeAll versions0:2.4.40-6.el6_7
openldap-servers-sql Red Hat:enterprise_linux:6::computenodeAll versions0:2.4.40-6.el6_7
openldap Red Hat:enterprise_linux:6::serverAll versions0:2.4.40-6.el6_7
openldap-clients Red Hat:enterprise_linux:6::serverAll versions0:2.4.40-6.el6_7
openldap-debuginfo Red Hat:enterprise_linux:6::serverAll versions0:2.4.40-6.el6_7
openldap-devel Red Hat:enterprise_linux:6::serverAll versions0:2.4.40-6.el6_7
openldap-servers Red Hat:enterprise_linux:6::serverAll versions0:2.4.40-6.el6_7
openldap-servers-sql Red Hat:enterprise_linux:6::serverAll versions0:2.4.40-6.el6_7
openldap Red Hat:enterprise_linux:6::workstationAll versions0:2.4.40-6.el6_7
openldap-clients Red Hat:enterprise_linux:6::workstationAll versions0:2.4.40-6.el6_7
openldap-debuginfo Red Hat:enterprise_linux:6::workstationAll versions0:2.4.40-6.el6_7
openldap-devel Red Hat:enterprise_linux:6::workstationAll versions0:2.4.40-6.el6_7

Products include Apple Mac Os X, Openldap Openldap.

How do I fix CVE-2015-6908?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2015-6908 being exploited?

There is no known exploitation of CVE-2015-6908 in the wild and no public exploit code.

Public exploit code: 1 Exploit-DB entry.

All Apple Mac Os X vulnerabilities

Sources

Also known as DEBIAN-CVE-2015-6908, DLA-309-1, DSA-3356-1, GHSA-436x-9fhf-jq78, MGASA-2015-0374, RHSA-2015:1840 and 3 more.

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