HOMEVULNERABILITIESCVE-2022-42898
HIGH

CVE-2022-42898

CWE-190Published: December 25, 2022· Updated: Jun 17, 2026

8.8
CVSS v3.1

Official Description

PAC parsing in MIT Kerberos 5 (aka krb5) before 1.19.4 and 1.20.x before 1.20.1 has integer overflows that may lead to remote code execution (in KDC, kadmind, or a GSS or Kerberos application server) on 32-bit platforms (which have a resultant heap-based buffer overflow), and cause a denial of service on other platforms. This occurs in krb5_pac_parse in lib/krb5/krb/pac.c. Heimdal before 7.7.1 has "a similar bug."

NVD Source

Technical Analysis

CVE-2022-42898 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

heimdal_project1 product(s)
heimdal
mit1 product(s)
kerberos 5
samba1 product(s)
samba
Source: NVD CPE · 4 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://bugzilla.samba.org/show_bug.cgi?id=15203
PATCHhttps://github.com/krb5/krb5/commit/ea92d2f0fcceb54a70910fa32e9a0d7a5afc3583
PATCHhttps://bugzilla.samba.org/show_bug.cgi?id=15203
PATCHhttps://github.com/krb5/krb5/commit/ea92d2f0fcceb54a70910fa32e9a0d7a5afc3583
ADVISORYhttps://github.com/heimdal/heimdal/security/advisories/GHSA-64mq-fvfj-5x3c
ADVISORYhttps://web.mit.edu/kerberos/advisories/
ADVISORYhttps://web.mit.edu/kerberos/krb5-1.19/
ADVISORYhttps://web.mit.edu/kerberos/krb5-1.20/README-1.20.1.txt
ADVISORYhttps://www.samba.org/samba/security/CVE-2022-42898.html
ADVISORYhttps://github.com/heimdal/heimdal/security/advisories/GHSA-64mq-fvfj-5x3c
ADVISORYhttps://web.mit.edu/kerberos/advisories/
ADVISORYhttps://web.mit.edu/kerberos/krb5-1.19/
ADVISORYhttps://web.mit.edu/kerberos/krb5-1.20/README-1.20.1.txt
ADVISORYhttps://www.samba.org/samba/security/CVE-2022-42898.html

All References (22)

→
https://bugzilla.samba.org/show_bug.cgi?id=15203Exploit · Issue Tracking · Patch · Third Party Advisory
→
https://github.com/heimdal/heimdal/security/advisories/GHSA-64mq-fvfj-5x3cThird Party Advisory
→
https://github.com/krb5/krb5/commit/ea92d2f0fcceb54a70910fa32e9a0d7a5afc3583Patch · Third Party Advisory
→
https://security.gentoo.org/glsa/202309-06
→
https://security.gentoo.org/glsa/202310-06
→
https://security.netapp.com/advisory/ntap-20230216-0008/
→
https://security.netapp.com/advisory/ntap-20230223-0001/
→
https://web.mit.edu/kerberos/advisories/Vendor Advisory
→
https://web.mit.edu/kerberos/krb5-1.19/Release Notes · Vendor Advisory
→
https://web.mit.edu/kerberos/krb5-1.20/README-1.20.1.txtVendor Advisory
→
https://www.samba.org/samba/security/CVE-2022-42898.htmlThird Party Advisory
→
https://bugzilla.samba.org/show_bug.cgi?id=15203Exploit · Issue Tracking · Patch · Third Party Advisory
→
https://github.com/heimdal/heimdal/security/advisories/GHSA-64mq-fvfj-5x3cThird Party Advisory
→
https://github.com/krb5/krb5/commit/ea92d2f0fcceb54a70910fa32e9a0d7a5afc3583Patch · Third Party Advisory
→
https://security.gentoo.org/glsa/202309-06

Quick Facts

CVE IDCVE-2022-42898
CVSS Score8.8 / 10
SeverityHIGH
WeaknessCWE-190
CISA KEVNo
Affected3 vendor(s)
PublishedDec 25, 2022

Related CVEs (CWE-190)

CVE-2015-5108
10.0
CVE-2015-5097
10.0
CVE-2010-3254
10.0
CVE-2008-2663
10.0
CVE-2012-5835
10.0
CVE-2013-2555
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2022-42898 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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