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CVE-2018-5729

19
FAUCET Score

CVE-2018-5729 is a medium-severity vulnerability affecting MIT krb5 versions 1.6 and later, as well as products from Debian, Fedora, and Red Hat. It allows an authenticated kadmin with specific permissions to an LDAP Kerberos database to trigger a denial of service or bypass a DN container check through specially crafted tagged data, resulting in a NULL pointer dereference. The attack vector is network-based with low complexity, requiring high privileges, and has a CVSS score of 4.7. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 5-1.6, < 5-1.21.2CPE matchmatch criteria
cpe:2.3:a:mit:kerberos_5:*:*:*:*:*:*:*:*
26CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:26:*:*:*:*:*:*:*
27CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:27:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.7MEDIUM

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
1.2
Impact Score
3.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.60%
Probability of exploitation in next 30 days
EPSS Percentile
83.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0260 is in the 94th percentile among its peer group of 3,565 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (8)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: krb5-0:1.15.1-34.el7
View patch
redhatpatch availablevia nvd_reference
View patch
redhatend of lifevia redhat_api
Product: Red Hat JBoss Core ServicesFixed in: krb5
redhatend of lifevia redhat_api
Product: Red Hat JBoss Enterprise Application Platform 6Fixed in: krb5
redhatend of lifevia redhat_api
Product: Red Hat JBoss Enterprise Web Server 2Fixed in: krb5
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: krb5
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: krb5

Vendor Advisories (1)

redhatCVE-2018-5729Low

krb5: null dereference in kadmind or DN container check bypass by supplying special crafted data

Mar 1, 2018

References

access.redhat.com / errata/RHBA-2019:0327
Third Party Advisory
access.redhat.com / errata/RHSA-2018:3071
Third Party Advisory
bugs.debian.org / cgi-bin/bugreport.cgi
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingPatchThird Party Advisory
github.com / krb5/krb5/commit/e1caf6fb74981da62039846931ebdffed71309d1
PatchThird Party Advisory
lists.debian.org / debian-lts-announce/2019/01/msg00020.html
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2021/09/msg00019.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/GK5T6JPMBHBPKS7HNGHYUUF4KKRMNSNU
Mailing ListThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/OIFUL3CPM4S5TOXTTOCQ3CUZN6XCXUTR
Mailing ListThird Party Advisory
securitytracker.com / id/1042071
Third Party AdvisoryVDB Entry