#VU11080 NULL pointer dereference in Kerberos 5 - CVE-2018-5729

Vulnerability identifier: #VU11080

Vulnerability risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-5729

CWE-ID: CWE-476

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Kerberos 5
Client/Desktop applications / Software for system administration

Vendor: MIT

Description
The vulnerability allows a local attacker to cause DoS condition on the target system.

The weakness exists due to NULL pointer dereference. A local attacker can add crafted principals to the Lightweight Directory Access Protocol (LDAP) database and cause the service to crash.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Kerberos 5: 1.4 - 1.6

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External links
https://github.com/krb5/krb5/commit/e1caf6fb74981da62039846931ebdffed71309d1

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.