Heap-based buffer overflow in OpenLDAP



| Updated: 2020-08-03
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2011-4079
CWE-ID CWE-122
Exploitation vector Network
Public exploit N/A
Vulnerable software
 OpenLDAP
Server applications / Directory software, identity management

Vendor OpenLDAP.org

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Heap-based buffer overflow

EUVDB-ID: #VU33332

Risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2011-4079

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in Off-by-one error in the UTF8StringNormalize function in OpenLDAP 2.4.26 and earlier. A remote attacker can use a zero-length string that triggers a heap-based buffer overflow to trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update to version 2.4.27.

Vulnerable software versions

OpenLDAP: 2.4.3 - 2.4.26

CPE2.3 External links

https://secunia.com/advisories/46599
https://security.gentoo.org/glsa/glsa-201406-36.xml
https://www.openldap.org/devel/gitweb.cgi?p=openldap.git;a=commitdiff;h=507238713b71208ec4f262f312cb495a302df9e9
https://www.openldap.org/its/index.cgi/Software%20Bugs?id=7059;selectid=7059
https://www.openwall.com/lists/oss-security/2011/10/26/5
https://www.openwall.com/lists/oss-security/2011/10/26/9
https://www.securityfocus.com/bid/50384
https://www.ubuntu.com/usn/USN-1266-1
https://bugzilla.redhat.com/show_bug.cgi?id=749324
https://exchange.xforce.ibmcloud.com/vulnerabilities/70991


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user 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.



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