NULL Pointer Dereference Affecting krb5 package, versions <1.15.3-r0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published16 Jan 2018
- disclosed16 Jan 2018
Introduced: 16 Jan 2018
CVE-2018-5710 (opens in a new tab)How to fix?
Upgrade Alpine:3.18 krb5 to version 1.15.3-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream krb5 package and not the krb5 package as distributed by Alpine.
See How to fix? for Alpine:3.18 relevant fixed versions and status.
An issue was discovered in MIT Kerberos 5 (aka krb5) through 1.16. The pre-defined function "strlen" is getting a "NULL" string as a parameter value in plugins/kdb/ldap/libkdb_ldap/ldap_principal2.c in the Key Distribution Center (KDC), which allows remote authenticated users to cause a denial of service (NULL pointer dereference) via a modified kadmin client.
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-5710
- https://security-tracker.debian.org/tracker/CVE-2018-5710
- https://github.com/poojamnit/Kerberos-V5-1.16-Vulnerabilities/tree/master/Denial%20Of%20Service%28DoS%29
- https://github.com/poojamnit/Kerberos-V5-1.16-Vulnerabilities/tree/master/Denial%20Of%20Service(DoS)
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2018-5710