PT-2018-17104 · Mit · Mit Kerberos 5

Published 2018-01-16 · Updated 2021-09-30 · CVE-2018-5710

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions: MIT Kerberos 5 (aka krb5) versions through 1.16

Description: An issue in the Key Distribution Center (KDC) allows remote authenticated users to cause a denial of service via a modified kadmin client. The pre-defined function strlen is getting a NULL string as a parameter value in plugins/kdb/ldap/libkdb ldap/ldap principal2.c, resulting in a NULL pointer dereference.

Recommendations: For versions through 1.16, as a temporary workaround, consider restricting access to the KDC to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2018-5710

DLA-1643-1

DLA-2771-1

MGASA-2018-0155

Affected Products

Mit Kerberos 5

References · 17

• https://security-tracker.debian.org/tracker/CVE-2018-5710 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-5710 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-5710 · Security Note
• https://osv.dev/vulnerability/CVE-2018-5710 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2018-5710 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-1643-1 · Vendor Advisory
• https://advisories.mageia.org/MGASA-2018-0155.html · Security Note
• https://osv.dev/vulnerability/ALPINE-CVE-2018-5710 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/[e-mail]/thread/GK5T6JPMBHBPKS7HNGHYUUF4KKRMNSNU · Vendor Advisory
• https://osv.dev/vulnerability/DLA-2771-1 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2018-0155 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2018-5710 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2018-5710 · Vendor Advisory
• https://github.com/poojamnit/Kerberos-V5-1.16-Vulnerabilities/tree/master/Denial%20Of%20Service%28DoS%29 · Note
• https://github.com/poojamnit/Kerberos-V5-1.16-Vulnerabilities/tree/master/Denial%20Of%20Service(DoS) · Note