#VU11076 Security restrictions bypass in Kerberos 5 - CVE-2018-5730

Vulnerability identifier: #VU11076

Vulnerability risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-5730

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

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

Vendor: MIT

Description
The vulnerability allows a remote authenticated attacker to bypass security restrictions on a targeted system.

The weakness exists due to insufficient security restrictions. A remote attacker can add crafted principals to the Lightweight Directory Access Protocol (LDAP) database and bypass a DN containership check.

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?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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