MIT krb5 1.6 or later allows an authenticated kadmin with permission to add principals to an LDAP Kerberos database to circumvent a DN conta
MIT krb5 1.6 or later allows an authenticated kadmin with permission to add principals to an LDAP Kerberos database to circumvent a DN containership check by supplying both a "linkdn" and "containerdn" database argument, or by supplying a DN string which is a left extension of a container DN string but is not hierarchically within the container DN.
- Published
- Mar 6, 2018
- Updated
- Jun 16, 2026
- EPSS
- 2.2% · 82th percentile
- CWE
- CWE-90
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Report tools
Action score
16
Monitor
Low priority for now.
- CVSS
- 15 / 40 · 3.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 2.2%
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
| Vendor | Product | CPE |
|---|---|---|
| mit | kerberos 5 | cpe:2.3:a:mit:kerberos_5 |
| fedoraproject | fedora | cpe:2.3:o:fedoraproject:fedora |
| debian | debian linux | cpe:2.3:o:debian:debian_linux |
| redhat | enterprise linux desktop | cpe:2.3:o:redhat:enterprise_linux_desktop |
| redhat | enterprise linux server | cpe:2.3:o:redhat:enterprise_linux_server |
| redhat | enterprise linux workstation | cpe:2.3:o:redhat:enterprise_linux_workstation |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- debian debian linux8.0
- debian debian linux9.0
- fedoraproject fedora26
- fedoraproject fedora27
- mit kerberos 55-1.6 and later · before 5-1.21.2
- redhat enterprise linux desktop7.0
- redhat enterprise linux server7.0
- redhat enterprise linux workstation7.0
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | krb5 | before 1.16.1-1 | 1.16.1-1 |
| Debian:8 | krb5 | before 1.12.1+dfsg-19+deb8u5 | 1.12.1+dfsg-19+deb8u5 |
| Debian:9 | krb5 | before 1.15-1+deb9u3 | 1.15-1+deb9u3 |
| openSUSE:Leap 15.0 | krb5 | before 1.15.2-lp150.5.6.1 | 1.15.2-lp150.5.6.1 |
| openSUSE:Leap 15.0 | krb5-mini | before 1.15.2-lp150.5.6.1 | 1.15.2-lp150.5.6.1 |
| Red Hat:enterprise_linux:7::client | krb5 | before 0:1.15.1-34.el7 | 0:1.15.1-34.el7 |
| Red Hat:enterprise_linux:7::client | krb5-debuginfo | before 0:1.15.1-34.el7 | 0:1.15.1-34.el7 |
| Red Hat:enterprise_linux:7::client | krb5-devel | before 0:1.15.1-34.el7 | 0:1.15.1-34.el7 |
| Red Hat:enterprise_linux:7::client | krb5-libs | before 0:1.15.1-34.el7 | 0:1.15.1-34.el7 |
| Red Hat:enterprise_linux:7::client | krb5-pkinit | before 0:1.15.1-34.el7 | 0:1.15.1-34.el7 |
| Red Hat:enterprise_linux:7::client | krb5-server | before 0:1.15.1-34.el7 | 0:1.15.1-34.el7 |
| Red Hat:enterprise_linux:7::client | krb5-server-ldap | before 0:1.15.1-34.el7 | 0:1.15.1-34.el7 |
| Red Hat:enterprise_linux:7::client | krb5-workstation | before 0:1.15.1-34.el7 | 0:1.15.1-34.el7 |
| Red Hat:enterprise_linux:7::client | libkadm5 | before 0:1.15.1-34.el7 | 0:1.15.1-34.el7 |
| SUSE:Linux Enterprise Desktop 12 SP2 | krb5 | before 1.12.5-40.23.2 | 1.12.5-40.23.2 |
| SUSE:Linux Enterprise Module for Basesystem 15 | krb5 | before 1.15.2-6.6.2 | 1.15.2-6.6.2 |
| SUSE:Linux Enterprise Software Development Kit 11 SP4 | krb5 | before 1.6.3-133.49.113.7.1 | 1.6.3-133.49.113.7.1 |
Same product
mit: all recordsOther highest-scoring records for the same primary product.
- CVE-2007-0956The telnet daemon (telnetd) in MIT krb5 before 1.6.1 allows remote attackers to bypass authentication and gain system access via a username 49Plan
- CVE-2011-0285The process_chpw_request function in schpw.c in the password-changing functionality in kadmind in MIT Kerberos 5 (aka krb5) 1.7 through 1.9 46Plan
- CVE-2001-0247Buffer overflows in BSD-based FTP servers allows remote attackers to execute arbitrary commands via a long pattern string containing a {} se46Plan
- CVE-2002-1235The kadm_ser_in function in (1) the Kerberos v4compatibility administration daemon (kadmind4) in the MIT Kerberos 5 (krb5) krb5-1.2.6 and ea45Plan
- CVE-2009-0846The asn1_decode_generaltime function in lib/krb5/asn.1/asn1_decode.c in the ASN.1 GeneralizedTime decoder in MIT Kerberos 5 (aka krb5) befor43Plan
- CVE-2008-0947Buffer overflow in the RPC library used by libgssrpc and kadmind in MIT Kerberos 5 (krb5) 1.4 through 1.6.3 allows remote attackers to execu43Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:krb5 | 1.16.1-1 · Debian:12 | Package registry (OSV) |
| opensuse:krb5 | 1.15.2-lp150.5.6.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:krb5-mini | 1.15.2-lp150.5.6.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| red hat:krb5 | 0:1.15.1-34.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:krb5-debuginfo | 0:1.15.1-34.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:krb5-devel | 0:1.15.1-34.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:krb5-libs | 0:1.15.1-34.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:krb5-pkinit | 0:1.15.1-34.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:krb5-server | 0:1.15.1-34.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:krb5-server-ldap | 0:1.15.1-34.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:krb5-workstation | 0:1.15.1-34.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:libkadm5 | 0:1.15.1-34.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| suse:krb5 | 1.12.5-40.23.2 · SUSE:Linux Enterprise Desktop 12 SP2 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- Administrator privileges are required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- low · data can be read
- Integrity
- low · data or configuration can be modified
- Availability
- none
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- Low
- Integrity impact
- Low
- Availability impact
- None
Weakness class (CWE)
CWE-90 · Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
—
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- www.securitytracker.com/id/1042071
- access.redhat.com/errata/RHBA-2019:0327
- access.redhat.com/errata/RHSA-2018:3071
- bugs.debian.org/cgi-bin/bugreport.cgi?bug=891869
- bugzilla.redhat.com/show_bug.cgi?id=1551082
- github.com/krb5/krb5/commit/e1caf6fb74981da62039846931ebdffed71309d1
- lists.debian.org/debian-lts-announce/2019/01/msg00020.html
- lists.debian.org/debian-lts-announce/2021/09/msg00019.html
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GK5T6JPMBHBPKS7HNGHYUUF4KKRMNSNU/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OIFUL3CPM4S5TOXTTOCQ3CUZN6XCXUTR/
Vendor advisories and official records. Exploit/PoC links are deliberately left out.