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CVE-2022-42898

HIGH
8.8
CVSS Score
Published: December 25, 2022 at 12:00 AM UTC
Updated: October 14, 2026 at 07:16 PM UTC
3 products affected across 3 vendorsSAMBAKerberos 5Heimdal

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Severity
HIGH8.8
Exploit prediction
EPSS 7%
SSVC
No known exploit

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."

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Heimdal· Heimdal Project
95%
v < 7.7.1
Affected range stops below 7.7.1, so it looks safe — our inference, not a vendor statement
Kerberos 5· Mit
95%
1.8 ≤ v < 1.19.41.201.20 beta1
Affected range stops below 1.19.4, so it looks safe — our inference, not a vendor statement
SAMBA· Samba
95%
v < 4.15.124.16.0 ≤ v < 4.16.74.17.0 ≤ v < 4.17.3
Affected range stops below 4.15.12, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.16.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.17.3, so it looks safe — our inference, not a vendor statement

References (12)

ExploitIssue TrackingPatchThird Party Advisory
Source: [email protected]
https://bugzilla.samba.org/show_bug.cgi?id=15203
Third Party Advisory
Source: [email protected]
https://github.com/heimdal/heimdal/security/advisories/GHSA-64mq-fvfj-5x3c
PatchThird Party Advisory
Source: [email protected]
https://github.com/krb5/krb5/commit/ea92d2f0fcceb54a70910fa32e9a0d7a5afc3583
Vendor Advisory
Source: [email protected]
https://security.gentoo.org/glsa/202309-06
Vendor Advisory
Source: [email protected]
https://security.gentoo.org/glsa/202310-06
Source: [email protected]
https://security.netapp.com/advisory/ntap-20230216-0008/
Source: [email protected]
https://security.netapp.com/advisory/ntap-20230223-0001/
Vendor Advisory
Source: [email protected]
https://web.mit.edu/kerberos/advisories/

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-190

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