#VU103504 Out-of-bounds write in Kerberos 5 - CVE-2025-24528

Vulnerability identifier: #VU103504

Vulnerability risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-24528

CWE-ID: CWE-787

Exploitation vector: Local network

Exploit availability: No

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

Vendor: MIT

Description

The vulnerability allows a remote user to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error when calculating ulog block size in kadmind. A remote user can trigger an out-of-bounds write and perform a denial of service (DoS) attack.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Kerberos 5: 1.7 - 1.21.3

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External links
https://bugzilla.redhat.com/show_bug.cgi?id=2342796
https://bugzilla.suse.com/show_bug.cgi?id=1236619

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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 local network (LAN).

Is there known malware, which exploits this vulnerability?

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