| Name | CVE-2018-5710 |
| Description | 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more) |
| NVD severity | medium (attack range: remote) |
| Debian Bugs | 889685 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| krb5 (PTS) | wheezy | 1.10.1+dfsg-5+deb7u7 | fixed |
| wheezy (security) | 1.10.1+dfsg-5+deb7u9 | fixed | |
| jessie | 1.12.1+dfsg-19+deb8u4 | vulnerable | |
| jessie (security) | 1.12.1+dfsg-19+deb8u2 | vulnerable | |
| stretch | 1.15-1+deb9u1 | vulnerable | |
| buster, sid | 1.16-2 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| krb5 | source | (unstable) | (unfixed) | medium | 889685 | |
| krb5 | source | wheezy | (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)
https://github.com/poojamnit/Kerberos-V5-1.16-Vulnerabilities/tree/master/Denial%20Of%20Service(DoS)
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.