DescriptionAn 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
Debian Bugs889685

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
krb5 (PTS)buster1.17-3+deb10u4fixed
buster (security)1.17-3+deb10u2fixed
bookworm, sid1.20-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
krb5sourcewheezy(not affected)


[stretch] - krb5 <no-dsa> (Minor issue)
[jessie] - krb5 <no-dsa> (Minor issue)
[wheezy] - krb5 <not-affected> (all strlen() parameters are checked for NULL)
The CVE is a duplicate of the #891869 issue(s) due to reporter not
having coordinated with upstream and the CVE assignment ist sill for
slight different coverage. Thus keep it distinct (for now) and mark
CVE-2018-5710 issue as well as fixed once #891869 is adressed.

Search for package or bug name: Reporting problems