TI-2018-04118 Aliases CVE-2018-5709 GHSA-9g2q-jwhw-j832

An issue was discovered in MIT Kerberos 5 (aka krb5) through 1.16.

LOW 37CWE-190Published 2018-01-16 · Updated 2024-08-05

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: None · High · None
Fix status: No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA.

Summary

An issue was discovered in MIT Kerberos 5 (aka krb5) through 1.16. There is a variable "dbentry->n_key_data" in kadmin/dbutil/dump.c that can store 16-bit data but unknowingly the developer has assigned a "u4" variable to it, which is for 32-bit data. An attacker can use this vulnerability to affect other artifacts of the database as we know that a Kerberos database dump file contains trusted data.

Why it matters now

EPSS 0.02049 81st percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:mit:kerberos::::::::	up to 5-1.16	Vulnerable	moos-ivp

cpe:2.3:a:mit:kerberos:*:*:*:*:*:*:*:* Versions up to 5-1.16 Vulnerable ·moos-ivp

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 7 products

Red Hat Enterprise Linux 5
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat JBoss Core Services
Red Hat JBoss Enterprise Application Platform 6
Red Hat JBoss Enterprise Web Server 2

Timeline

2026-10-02 Threatist record created from CVE-2018-5709
2026-10-03 Alias added: GHSA-9g2q-jwhw-j832

References

Advisory 1

https://github.com/poojamnit/Kerberos-V5-1.16-Vulnerabilities/tree/master/Integer%20Overflow

Other 1

[mina-dev] 20210225 [jira] [Created] (FTPSERVER-500) Security vulnerability in common/lib/log4j-1.2.17.jar

TI-2001-00539 Buffer overflow in BSD-based telnetd telnet daemon on various operating systems allows… CVSS 2.0HIGH 10.0
TI-2000-00389 Buffer overflow in krb_rd_req function in Kerberos 4 and 5 allows remote attackers to gain root privileges. CVSS 2.0HIGH 10.0
TI-2004-00472 Multiple buffer overflows in krb5_aname_to_localname for MIT Kerberos 5 (krb5) 1.3.3 and… CVSS 2.0HIGH 10.0
TI-2009-03997 Multiple integer underflows in the (1) AES and (2) RC4 decryption functionality in the… CVSS 2.0HIGH 10.0
TI-2000-00391 Buffer overflow in krshd in Kerberos 5 allows remote attackers to gain root privileges. CVSS 2.0HIGH 10.0
TI-2000-00390 Buffer overflow in krb425_conv_principal function in Kerberos 5 allows remote attackers to gain root privileges. CVSS 2.0HIGH 10.0

See all 32 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences