Home/CVE/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 r
CVE

CVE-2022-42898

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 r

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.".

HIGH · CVSS 8.8 EPSS 0.10832
Act now
  • EPSS ≥ 0.10 - elevated exploitation probability
  • EPSS percentile: top 6% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-190Integer Overflow or Wraparound
CWE-190Integer Overflow or Wraparound
▤

Affected Products & Versions

6
mit kerberos 5>= 1.8 and < 1.19.4
mit kerberos 5all versions
heimdal project heimdal< 7.7.1
samba< 4.15.12
samba>= 4.16.0 and < 4.16.7
samba>= 4.17.0 and < 4.17.3
⚠

Public Exploits & PoCs

1
pocbugzilla.samba.org · show_bug.cgi?id=15203bugzilla.samba.org
▣

Scoring & Timeline

8.8
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD25 Dec 2022 · 06:15 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

30
usnUSN-7582-1
msrcCVE-2022-42898
suse-csafopenSUSE-SU-2024:12524-1
suse-csafopenSUSE-SU-2024:12525-1
suse-csafopenSUSE-SU-2024:12580-1
🔗

References & Sources

10
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/heimdal/heimdal/security/advisories/GHSA-64mq-fvfj-5x3cThird Party Advisory
https://github.com/krb5/krb5/commit/ea92d2f0fcceb54a70910fa32e9a0d7a5afc3583PatchThird 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/
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