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Fencer Vulns
high 8.8

CVE-2022-42898 json

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 executio…

published 2022-12-25 3 y ago modified 2026-10-14 25 d ago also EUVD-2022-45956 , JLSEC-2026-91

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
6.9%
EPSS 6.9% chance of exploitation in 30 days, percentile 94%
public exploits
0
none known

Summary

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."

Patch / fix

  • julia Kerberos_krb5_jll 1.21.3+0
  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP V3.1.5
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP V3.1.5
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP V3.1.5
  • krb5 Debian 14, Debian 13, Debian 12 1.20.1-1
  • samba Debian 14, Debian 13, Debian 12 2:4.17.3+dfsg-1
  • heimdal Debian 14, Debian 13, Debian 12 7.8.git20221115.a6cf945+dfsg-1

debian advisories DEBIAN-CVE-2022-42898

  • krb5 Ubuntu 18.04 LTS 1.16-2ubuntu0.3
  • krb5 Ubuntu 20.04 LTS 1.17-6ubuntu4.2
  • krb5 Ubuntu 22.04 LTS 1.19.2-2ubuntu0.1
  • samba Ubuntu 20.04 LTS 2:4.15.13+dfsg-0ubuntu0.20.04.1
  • samba Ubuntu 22.04 LTS 2:4.15.13+dfsg-0ubuntu1
  • heimdal Ubuntu 18.04 LTS 7.5.0+dfsg-1ubuntu0.3
  • heimdal Ubuntu 20.04 LTS 7.7.0+dfsg-1ubuntu1.3
  • krb5 Ubuntu Pro 14.04 LTS 1.12+dfsg-2ubuntu5.4+esm3

ubuntu advisories UBUNTU-CVE-2022-42898

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • krb5 RHEL 8 1.18.2-25.el8_8
  • libkadm5 RHEL 8 1.18.2-25.el8_8
  • krb5-libs RHEL 8 1.18.2-25.el8_8
  • krb5-pkinit RHEL 8 1.18.2-25.el8_8
  • krb5-server RHEL 8 1.18.2-25.el8_8
  • krb5-server-ldap RHEL 8 1.18.2-25.el8_8
  • krb5-workstation RHEL 8 1.18.2-25.el8_8
  • krb5 RHEL 7 1.15.1-55.el7_9

red hat advisories RHEA-2023:3850RHSA-2022:8669RHSA-2022:8663RHSA-2022:8662RHSA-2022:8640RHSA-2022:8648

  • krb5 SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE Real Time 15 SP3 +9 more 1.19.2-150300.10.1
  • samba SLE Module for Basesystem 15 SP4, SLE Micro 5.3, SLE High Availability Extension 15 SP4 +2 more 4.15.13+git.591.ab36624310c-150400.3.19.1
  • samba SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 +1 more 4.15.13+git.482.1ac2c665c7-3.74.1
  • samba SLE Module for Python 2 15 SP3, SLE Module for Basesystem 15 SP3, SLE Micro 5.2 +4 more 4.15.12+git.535.7750e5c95ef-150300.3.43.1
  • krb5 SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES 12 SP5 +6 more 1.12.5-40.43.1
  • krb5 SLE Module for Server Applications 15 SP3, SLE Module for Basesystem 15 SP3, SLE Micro 5.2 +3 more 1.19.2-150300.7.7.1
  • krb5-mini openSUSE Leap 15.3 1.19.2-150300.7.7.1
  • krb5 SLES for SAP 15 SP2, SLES for SAP 15 SP1, SLES 15 SP2-LTSS +12 more 1.16.3-150100.3.27.1

suse advisories SUSE-SU-2023:0198-1SUSE-SU-2023:0160-1SUSE-SU-2023:0081-1SUSE-SU-2022:4395-1SUSE-SU-2022:4335-1SUSE-SU-2022:4167-1

  • krb5 openSUSE Tumbleweed 1.20.1-1.1
  • samba openSUSE Tumbleweed 4.17.3+git.279.ff9bb8a298-1.1
  • libheimdal Package Hub 15 SP3, openSUSE Leap 15.3 7.8.0-bp153.2.4.1
  • libheimdal Package Hub 15 SP4, openSUSE Leap 15.4 7.8.0-bp154.2.4.1

opensuse advisories openSUSE-SU-2024:12524-1openSUSE-SU-2024:12525-1openSUSE-SU-2023:0020-1openSUSE-SU-2023:0019-1

  • libkadm5 AlmaLinux 9 1.19.1-24.el9_1
  • krb5-libs AlmaLinux 9 1.19.1-24.el9_1
  • krb5-pkinit AlmaLinux 9 1.19.1-24.el9_1
  • krb5-server AlmaLinux 9 1.19.1-24.el9_1
  • krb5-server-ldap AlmaLinux 9 1.19.1-24.el9_1
  • krb5-workstation AlmaLinux 9 1.19.1-24.el9_1
  • libkadm5 AlmaLinux 8 1.18.2-22.el8_7
  • krb5-libs AlmaLinux 8 1.18.2-22.el8_7

almalinux advisories ALSA-2022:8637ALSA-2022:8638

  • krb5 Rocky Linux 8 1.18.2-22.el8_7
  • krb5 Rocky Linux 9 1.19.1-24.el9_1

rocky linux advisories RLSA-2022:8638RLSA-2022:8637

  • krb5 Alpine 3.16, Alpine 3.15 1.19.4-r0
  • krb5 Alpine 3.24, Alpine 3.23, Alpine 3.22 +5 more 1.20.1-r0
  • samba Alpine 3.16, Alpine 3.15 4.15.12-r0
  • samba Alpine 3.24, Alpine 3.23, Alpine 3.22 +4 more 4.16.7-r0
  • heimdal Alpine 3.24, Alpine 3.23, Alpine 3.22 +8 more 7.7.1-r0

alpine advisories ALPINE-CVE-2022-42898

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • krb5 CBL-Mariner 2.0 1.19.4-1
  • samba Azure Linux 3.0 4.18.3-1

azure linux advisories AZL-12133AZL-37017

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

  • samba Arch Linux 4.17.5-1

arch linux advisories AVG-2828

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-42898 updated cvss 8.8

krb5: integer overflow vulnerabilities in PAC parsing

  • Red Hat Enterprise Linux AppStream (v. 9) krb5-devel 1.19.1-24.el9_1
    fixed: vendor fix RHSA-2022:8637
  • Red Hat Enterprise Linux AppStream EUS (v.9.0) krb5-devel 1.19.1-16.el9_0
    fixed: vendor fix RHSA-2022:8669
  • Red Hat Enterprise Linux BaseOS (v. 8) krb5 1.18.2-22.el8_7, krb5 1.18.2-25.el8_8, libkadm5 1.18.2-22.el8_7, libkadm5 1.18.2-25.el8_8, krb5-libs 1.18.2-22.el8_7, krb5-libs 1.18.2-25.el8_8, +8 more
    fixed: vendor fix RHSA-2022:8638
  • Red Hat Enterprise Linux BaseOS (v. 9) krb5 1.19.1-24.el9_1, libkadm5 1.19.1-24.el9_1, krb5-libs 1.19.1-24.el9_1, krb5-pkinit 1.19.1-24.el9_1, krb5-server 1.19.1-24.el9_1, krb5-server-ldap 1.19.1-24.el9_1, +1 more
    fixed: vendor fix RHSA-2022:8637
  • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) krb5 1.17-19.el8_2, libkadm5 1.17-19.el8_2, krb5-libs 1.17-19.el8_2, krb5-pkinit 1.17-19.el8_2, krb5-server 1.17-19.el8_2, krb5-server-ldap 1.17-19.el8_2, +1 more
    fixed: vendor fix RHSA-2022:8648
  • Red Hat Enterprise Linux BaseOS E4S (v. 8.1) krb5 1.17-10.el8_1, libkadm5 1.17-10.el8_1, krb5-libs 1.17-10.el8_1, krb5-pkinit 1.17-10.el8_1, krb5-server 1.17-10.el8_1, krb5-server-ldap 1.17-10.el8_1, +1 more
    fixed: vendor fix RHSA-2022:8641
  • Red Hat Enterprise Linux BaseOS E4S (v. 8.2) krb5 1.17-19.el8_2, libkadm5 1.17-19.el8_2, krb5-libs 1.17-19.el8_2, krb5-pkinit 1.17-19.el8_2, krb5-server 1.17-19.el8_2, krb5-server-ldap 1.17-19.el8_2, +1 more
    fixed: vendor fix RHSA-2022:8648
  • Red Hat Enterprise Linux BaseOS EUS (v.8.4) krb5 1.18.2-9.el8_4, libkadm5 1.18.2-9.el8_4, krb5-libs 1.18.2-9.el8_4, krb5-pkinit 1.18.2-9.el8_4, krb5-server 1.18.2-9.el8_4, krb5-server-ldap 1.18.2-9.el8_4, +1 more
    fixed: vendor fix RHSA-2022:8639
show 8 more
  • Red Hat Enterprise Linux BaseOS EUS (v.8.6) krb5 1.18.2-15.el8_6, libkadm5 1.18.2-15.el8_6, krb5-libs 1.18.2-15.el8_6, krb5-pkinit 1.18.2-15.el8_6, krb5-server 1.18.2-15.el8_6, krb5-server-ldap 1.18.2-15.el8_6, +1 more
    fixed: vendor fix RHSA-2022:8662
  • Red Hat Enterprise Linux BaseOS EUS (v.9.0) krb5 1.19.1-16.el9_0, libkadm5 1.19.1-16.el9_0, krb5-libs 1.19.1-16.el9_0, krb5-pkinit 1.19.1-16.el9_0, krb5-server 1.19.1-16.el9_0, krb5-server-ldap 1.19.1-16.el9_0, +1 more
    fixed: vendor fix RHSA-2022:8669
  • Red Hat Enterprise Linux BaseOS TUS (v. 8.2) krb5 1.17-19.el8_2, libkadm5 1.17-19.el8_2, krb5-libs 1.17-19.el8_2, krb5-pkinit 1.17-19.el8_2, krb5-server 1.17-19.el8_2, krb5-server-ldap 1.17-19.el8_2, +1 more
    fixed: vendor fix RHSA-2022:8648
  • Red Hat Enterprise Linux Client (v. 7) krb5 1.15.1-55.el7_9, libkadm5 1.15.1-55.el7_9, krb5-libs 1.15.1-55.el7_9, krb5-pkinit 1.15.1-55.el7_9, krb5-workstation 1.15.1-55.el7_9 Red Hat Enterprise Linux Client Optional (v. 7) krb5-server 1.15.1-55.el7_9, krb5-server-ldap 1.15.1-55.el7_9 Red Hat Enterprise Linux ComputeNode Optional (v. 7) krb5-server 1.15.1-55.el7_9, krb5-server-ldap 1.15.1-55.el7_9
    fixed: vendor fix RHSA-2022:8640
  • Red Hat Enterprise Linux Server (v. 6 ELS) krb5 1.10.3-66.el6_10, libkadm5 1.10.3-66.el6_10, krb5-libs 1.10.3-66.el6_10, krb5-server 1.10.3-66.el6_10, krb5-server-ldap 1.10.3-66.el6_10, krb5-workstation 1.10.3-66.el6_10, +1 more
    fixed: vendor fix RHSA-2022:8663
  • Red Hat Enterprise Linux Server (v. 7) krb5 1.15.1-55.el7_9, libkadm5 1.15.1-55.el7_9, krb5-libs 1.15.1-55.el7_9, krb5-pkinit 1.15.1-55.el7_9, krb5-server 1.15.1-55.el7_9, krb5-server-ldap 1.15.1-55.el7_9, +1 more Red Hat Enterprise Linux Workstation (v. 7) krb5 1.15.1-55.el7_9, libkadm5 1.15.1-55.el7_9, krb5-libs 1.15.1-55.el7_9, krb5-pkinit 1.15.1-55.el7_9, krb5-server 1.15.1-55.el7_9, krb5-server-ldap 1.15.1-55.el7_9, +1 more
    fixed: vendor fix RHSA-2022:8640
  • Red Hat Virtualization 4 Hypervisor for RHEL 8 redhat-virtualization-host 4.5.3-202212070734_8.6, redhat-virtualization-host-image-update 4.5.3-202212070734_8.6
    fixed: vendor fix RHSA-2022:9029
  • Red Hat Enterprise Linux 6 samba, samba4, samba4-dc, samba-swat, samba4-libs, samba4-pidl, +17 more Red Hat Enterprise Linux 7 ctdb, samba, samba-dc, ctdb-tests, samba-libs, samba-pidl, +18 more Red Hat Enterprise Linux 8 ctdb, samba, libnetapi, ctdb-tests, samba-libs, samba-pidl, +24 more Red Hat Enterprise Linux 9 ctdb, samba, libldb, ldb-tools, libnetapi, samba-libs, +27 more Red Hat Storage 3 ctdb, samba, samba-dc, ctdb-tests, samba-libs, samba-pidl, +21 more Red Hat RHEL 8-based RHEV-H for RHEV 4 (build requirements) redhat-release-virtualization-host 4.5.3-2.el8ev, redhat-virtualization-host-productimg 4.5.3-2.el8, redhat-release-virtualization-host-content 4.5.3-2.el8ev, redhat-virtualization-host-image-update-placeholder 4.5.3-2.el8ev
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

cisa ICSA-23-348-10 updated cvss 8.8

Siemens SIMATIC S7-1500

  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) >= 3.1.0, < 3.1.5 Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) >= 3.1.0, < 3.1.5
    affected: fixed in V3.1.5, mitigation support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

cisa ICSA-25-105-08 updated cvss 8.0

ABB M2M Gateway

  • ABB M2M Gateway >=4.1.2, <=5.0.3, >=5.0.1, <=5.0.3
    affected: mitigation

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
18 mo ago

Exploit prediction

6.86% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • bugzilla.samba.org https://bugzilla.samba.org/show_bug.cgi?id=15203 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
OSV 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
julia Kerberos_krb5_jll
<1.21.3+0
1.21.3+0

Affected products

  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

Classification

Weakness
  • CWE-190 Integer Overflow or Wraparound

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.