CVE-2022-42898: Buffer Overflow

Published Nov 8, 2022
·
Updated

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 krb5pacparse in lib/krb5/krb/pac.c. Heimdal before 7.7.1 has "a similar bug."

Other sources

Three integer overflow vulnerabilities have been discovered in the MIT krb5 library function krb5parsepac()

— Red Hat

Affected Software

51 affected componentsFixes available
MIT Kerberos 5>=1.8<1.19.4
MIT Kerberos 5=1.20
MIT Kerberos 5=1.20-beta1
Heimdal Project Heimdal<7.7.1
Samba Samba<4.15.12
Samba Samba>=4.16.0<4.16.7
Samba Samba>=4.17.0<4.17.3
debian/heimdal
7.8.git20221117.28daf24+dfsg-27.8.git20221117.28daf24+dfsg-9+deb13u17.8.git20240113.1b4565a+dfsg-2
debian/krb5
1.20.1-2+deb12u51.21.3-5+deb13u11.22.1-3
debian/samba
2:4.17.12+dfsg-0+deb12u42:4.22.11+dfsg-0+deb13u12:4.22.10+dfsg-0+deb13u22:4.25.1+dfsg-1
alpine/heimdal<7.7.1-r0
7.7.1-r0
alpine/heimdal<7.7.1-r0
7.7.1-r0
alpine/heimdal<7.7.1-r0
7.7.1-r0
alpine/heimdal<7.7.1-r0
7.7.1-r0
alpine/heimdal<7.7.1-r0
7.7.1-r0
alpine/heimdal<7.7.1-r0
7.7.1-r0
alpine/heimdal<7.7.1-r0
7.7.1-r0
alpine/heimdal<7.7.1-r0
7.7.1-r0
alpine/heimdal<7.7.1-r0
7.7.1-r0
alpine/heimdal<7.7.1-r0
7.7.1-r0
alpine/heimdal<7.7.1-r0
7.7.1-r0
alpine/krb5<1.19.4-r0
1.19.4-r0
alpine/krb5<1.19.4-r0
1.19.4-r0
alpine/krb5<1.20.1-r0
1.20.1-r0
alpine/krb5<1.20.1-r0
1.20.1-r0
alpine/krb5<1.20.1-r0
1.20.1-r0
alpine/krb5<1.20.1-r0
1.20.1-r0
alpine/krb5<1.20.1-r0
1.20.1-r0
alpine/krb5<1.20.1-r0
1.20.1-r0
alpine/krb5<1.20.1-r0
1.20.1-r0
alpine/krb5<1.20.1-r0
1.20.1-r0
alpine/samba>=4.16.0<4.15.12-r0
4.15.12-r0
alpine/samba>=4.16.0<4.15.12-r0
4.15.12-r0
alpine/samba>=4.16.0<4.16.7-r0
4.16.7-r0
alpine/samba>=4.16.0<4.16.7-r0
4.16.7-r0
alpine/samba>=4.16.0<4.16.7-r0
4.16.7-r0
alpine/samba>=4.16.0<4.16.7-r0
4.16.7-r0
alpine/samba>=4.16.0<4.16.7-r0
4.16.7-r0
alpine/samba>=4.16.0<4.16.7-r0
4.16.7-r0
alpine/samba>=4.16.0<4.16.7-r0
4.16.7-r0
debian/heimdal<7.8.git20221115.a6cf945+dfsg-1
7.8.git20221115.a6cf945+dfsg-1
debian/heimdal<7.8.git20221115.a6cf945+dfsg-1
7.8.git20221115.a6cf945+dfsg-1
debian/heimdal<7.8.git20221115.a6cf945+dfsg-1
7.8.git20221115.a6cf945+dfsg-1
debian/krb5<1.20.1-1
1.20.1-1
debian/krb5<1.20.1-1
1.20.1-1
debian/krb5<1.20.1-1
1.20.1-1
debian/samba<2:4.17.3+dfsg-1
2:4.17.3+dfsg-1
debian/samba<2:4.17.3+dfsg-1
2:4.17.3+dfsg-1
debian/samba<2:4.17.3+dfsg-1
2:4.17.3+dfsg-1
redhat/krb5<1.20.1
1.20.1
redhat/krb5<1.19.4
1.19.4

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade debian/heimdal to a version that resolves this vulnerability.

    Fixed in 7.8.git20221117.28daf24+dfsg-2Fixed in 7.8.git20221117.28daf24+dfsg-9+deb13u1Fixed in 7.8.git20240113.1b4565a+dfsg-2
  2. Upgrade

    Upgrade debian/krb5 to a version that resolves this vulnerability.

    Fixed in 1.20.1-2+deb12u5Fixed in 1.21.3-5+deb13u1Fixed in 1.22.1-3
  3. Upgrade

    Upgrade debian/samba to a version that resolves this vulnerability.

    Fixed in 2:4.17.12+dfsg-0+deb12u4Fixed in 2:4.22.11+dfsg-0+deb13u1Fixed in 2:4.22.10+dfsg-0+deb13u2Fixed in 2:4.25.1+dfsg-1
  4. Upgrade

    Upgrade alpine/heimdal to a version that resolves this vulnerability.

    Fixed in 7.7.1-r0
  5. Upgrade

    Upgrade alpine/krb5 to a version that resolves this vulnerability.

    Fixed in 1.19.4-r0
  6. Upgrade

    Upgrade alpine/krb5 to a version that resolves this vulnerability.

    Fixed in 1.20.1-r0
  7. Upgrade

    Upgrade alpine/samba to a version that resolves this vulnerability.

    Fixed in 4.15.12-r0
  8. Upgrade

    Upgrade alpine/samba to a version that resolves this vulnerability.

    Fixed in 4.16.7-r0
  9. Upgrade

    Upgrade debian/heimdal to a version that resolves this vulnerability.

    Fixed in 7.8.git20221115.a6cf945+dfsg-1
  10. Upgrade

    Upgrade debian/krb5 to a version that resolves this vulnerability.

    Fixed in 1.20.1-1
  11. Upgrade

    Upgrade debian/samba to a version that resolves this vulnerability.

    Fixed in 2:4.17.3+dfsg-1
  12. Upgrade

    Upgrade redhat/krb5 to a version that resolves this vulnerability.

    Fixed in 1.20.1
  13. Upgrade

    Upgrade redhat/krb5 to a version that resolves this vulnerability.

    Fixed in 1.19.4

Event History

Nov 8, 2022
Data Sourced
via Red Hat·09:13 AM
DescriptionSeverityAffected Software
Dec 25, 2022
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
Description
Data Sourced
via NVD·06:15 AM
RemedyDescriptionSeverityWeaknessAffected Software
Data Sourced
via OSV·06:15 AM
DescriptionSeverityAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is the vulnerability ID of this security issue?

The vulnerability ID of this security issue is CVE-2022-42898.

2

What is the severity rating of CVE-2022-42898?

CVE-2022-42898 has a severity rating of 8.8 (High).

3

Which software versions are affected by CVE-2022-42898?

MIT Kerberos 5 versions before 1.19.4 and 1.20.x before 1.20.1 are affected.

4

How can CVE-2022-42898 lead to remote code execution?

CVE-2022-42898 can lead to remote code execution due to integer overflows in PAC parsing.

5

Where can I find more information about CVE-2022-42898?

You can find more information about CVE-2022-42898 in the references provided: [link1] [link2] [link3].

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203