A vulnerability was found in openldap that can cause a null pointer dereference in the bermemallocx() function.
A flaw was found in OpenLDAP. This flaw allows an attacker who can send a malicious packet to be processed by OpenLDAP’s slapd server, to trigger an assertion failure. The highest threat from this vulnerability is to system availability.
A flaw was found in OpenLDAP in versions before 2.4.56. This flaw allows an attacker who sends a malicious packet processed by OpenLDAP to force a failed assertion in csnNormalize23(). The highest threat from this vulnerability is to system availability.
null pointer dereference in bermemallocx function https://bugs.openldap.org/showbug.cgi?id=9904
Untrusted search path vulnerability in OpenLDAP before 2.2.28-r3 on Gentoo Linux allows local users in the portage group to gain privileges via a malicious shared object in the Portage temporary build directory, which is part of the RUNPATH.
liblber/io.c in OpenLDAP 2.2.4 to 2.4.10 allows remote attackers to cause a denial of service (program termination) via crafted ASN.1 BER datagrams that trigger an assertion error.
slapd/back-bdb/modrdn.c in the BDB backend for slapd in OpenLDAP 2.3.39 allows remote authenticated users to cause a denial of service (daemon crash) via a modrdn operation with a NOOP (LDAPXNOOPERATION) control, a related issue to CVE-2007-6698.
libraries/libldap/tlso.c in OpenLDAP 2.2 and 2.4, and possibly other versions, when OpenSSL is used, does not properly handle a '\0' character in a domain name in the subject's Common Name (CN) field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.
OpenLDAP 2.4.22 allows remote attackers to cause a denial of service (crash) via a modrdn call with a zero-length RDN destination string, which is not properly handled by the smrnormalize function and triggers a NULL pointer dereference in the IA5StringNormalize function in schemainit.c, as demonstrated using the Codenomicon LDAPv3 test suite.
The slapmodrdn2mods function in modrdn.c in OpenLDAP 2.4.22 does not check the return value of a call to the smrnormalize function, which allows remote attackers to cause a denial of service (segmentation fault) and possibly execute arbitrary code via a modrdn call with an RDN string containing invalid UTF-8 sequences, which triggers a free of an invalid, uninitialized pointer in the slapmodsfree function, as demonstrated using the Codenomicon LDAPv3 test suite.
A bug in slapd's UTF8StringNormalize() function can cause a one-byte buffer overflow when it is passed a zero-length string. The code then writes a '\0' past the one-byte long buffer allocated on the heap, which could possibly allow a remote authenticated user to crash slapd. As per the upstream report [1], this bug has been present since 2003-04-07 [2] so should affect all versions of openldap we currently ship.
A patch to correct the flaw has been committed [3] (depends on the previous patch [4]).
[1] http://www.openldap.org/its/index.cgi/Software%20Bugs?id=7059;selectid=7059 [2] http://www.openldap.org/devel/gitweb.cgi?p=openldap.git;a=commitdiff;h=67d6b23d [3] http://www.openldap.org/devel/gitweb.cgi?p=openldap.git;a=commitdiff;h=507238713b71208ec4f262f312cb495a302df9e9 [4] http://www.openldap.org/devel/gitweb.cgi?p=openldap.git;a=commitdiff;h=d0dd8616f1c68a868afeb8c2c5c09969e366e2c0
It was reported [1],[2] that OpenLDAP's slapd daemon would crash when it received a request to modify a DN and submits an empty old DN in the request. No binding is necessary, so even an anonymous user could cause slapd to crash.
This was reported against OpenLDAP 2.4.23 and was fixed in 2.4.24 [3].
References:
[1] http://www.openldap.org/its/index.cgi/Software%20Bugs?id=6768 [2] https://bugzilla.novell.com/showbug.cgi?id=674985#c1 [3] http://www.openldap.org/devel/cvsweb.cgi/servers/slapd/modrdn.c.diff?r1=1.170.2.8&r2=1.170.2.9
bind.cpp in back-ndb in OpenLDAP 2.4.x before 2.4.24 does not require authentication for the root Distinguished Name (DN), which allows remote attackers to bypass intended access restrictions via an arbitrary password.
chain.c in back-ldap in OpenLDAP 2.4.x before 2.4.24, when a master-slave configuration with a chain overlay and ppolicyforwardupdates (aka authentication-failure forwarding) is used, allows remote authenticated users to bypass external-program authentication by sending an invalid password to a slave server.
OpenLDAP. Multiple issues were addressed by updating to OpenLDAP version 2.4.28.
It was discovered that OpenLDAP, with the rwm overlay to slapd, could segfault if a user were able to query the directory and immediately unbind from the server. This seems to be due to the rwm overlay not doing reference counting properly, so rwmconndestroy frees the session context while rwmopsearch is using it. This condition also seems to require multiple cores/CPUs to trigger.
This was also reported upstream [1] and is currently unfixed.
[1] http://www.openldap.org/its/index.cgi/Incoming?id=7723
The bergetnext 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.
The nssparseciphers function in libraries/libldap/tlsm.c in OpenLDAP does not properly parse OpenSSL-style multi-keyword mode cipher strings, which might cause a weaker than intended cipher to be used and allow remote attackers to have unspecified impact via unknown vectors.
Double free vulnerability in the getvrFilter function in servers/slapd/filter.c in OpenLDAP 2.4.40 allows remote attackers to cause a denial of service (crash) via a crafted search query with a matched values control.
OpenLDAP. Multiple issues were addressed by updating to OpenLDAP version 2.4.28.
/usr/libexec/openldap/generate-server-cert.sh in openldap-servers sets weak permissions for the TLS certificate, which allows local users to obtain the TLS certificate by leveraging a race condition between the creation of the certificate, and the chmod to protect it.
slapd in OpenLDAP 2.4.45 and earlier creates a PID file after dropping privileges to a non-root account, which might allow local users to kill arbitrary processes by leveraging access to this non-root account for PID file modification before a root script executes a "kill cat /pathname" command, as demonstrated by openldap-initscript.
A flaw was discovered in OpenLDAP before 2.4.57 leading to a memch->bvlen miscalculation and slapd crash in the saslAuthzTo processing, resulting in denial of service.
A flaw was discovered in OpenLDAP before 2.4.57 leading to an infinite loop in slapd with the cancelextop Cancel operation, resulting in denial of service.
A flaw was discovered in OpenLDAP before 2.4.57 leading to a slapd crash in the Values Return Filter control handling, resulting in denial of service (double free and out-of-bounds read).
A flaw was discovered in OpenLDAP before 2.4.57 leading to an invalid pointer free and slapd crash in the saslAuthzTo processing, resulting in denial of service.
A flaw was discovered in OpenLDAP before 2.4.57 leading to a double free and slapd crash in the saslAuthzTo processing, resulting in denial of service.
An integer underflow was discovered in OpenLDAP before 2.4.57 leading to slapd crashes in the Certificate Exact Assertion processing, resulting in denial of service (schemainit.c serialNumberAndIssuerCheck).
An integer underflow was discovered in OpenLDAP before 2.4.57 leading to a slapd crash in the Certificate List Exact Assertion processing, resulting in denial of service.
A flaw was discovered in OpenLDAP before 2.4.57 leading to an assertion failure in slapd in the saslAuthzTo validation, resulting in denial of service.