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01 Record

CVE-2024-37370

In MIT Kerberos 5 (aka krb5) before 1.21.3, an attacker can modify the plaintext Extra Count field of a confidential GSS krb5 wrap token, causing the unwrapped token to appear truncated to the

HighPUBLISHEDCNA: mitre
CNA base score7.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
View raw JSON

02 Description

In MIT Kerberos 5 (aka krb5) before 1.21.3, an attacker can modify the plaintext Extra Count field of a confidential GSS krb5 wrap token, causing the unwrapped token to appear truncated to the

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.74% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 54.4% of scored records. A rank, not a probability.
NVD base score
7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2024-06-28 00:00Z2 YR AGO
Last updated
2026-10-15 00:43Z14 DAYS AGO
Reserved
2024-06-06
Assigning CNA
mitre
Record state
PUBLISHED
Severity
High (CVSS 7.5)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weaknesses
  • CWE-345Insufficient Verification of Data AuthenticityClass
Data version
5.2
Document digest
994df4a3c6609e874b376cde5bb6080dd10b0f1af50d0ead7ad0a7689c1ff945

05 Affected products

VendorProductVersionsPlatforms
mitkerberos_5Not specified—
redhatansible_automation_platformNot specified—
redhatenterprise_linuxNot specified—
redhatrhel_ausNot specified—
redhatrhel_e4sNot specified—
redhatrhel_elsNot specified—
redhatrhel_eusNot specified—
redhatrhel_tusNot specified—
redhatservice_interconnectNot specified—

06 References

07 Fixed in

AlmaLinux 8

  • krb5-devel
    Fixed in 1.18.2-29.el8_10
  • krb5-libs
    Fixed in 1.18.2-29.el8_10
  • krb5-pkinit
    Fixed in 1.18.2-29.el8_10
  • krb5-server
    Fixed in 1.18.2-29.el8_10
  • krb5-server-ldap
    Fixed in 1.18.2-29.el8_10
  • krb5-workstation
    Fixed in 1.18.2-29.el8_10
  • libkadm5
    Fixed in 1.18.2-29.el8_10

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

AlmaLinux 9

  • krb5-devel
    Fixed in 1.21.1-2.el9_4
  • krb5-libs
    Fixed in 1.21.1-2.el9_4
  • krb5-pkinit
    Fixed in 1.21.1-2.el9_4
  • krb5-server
    Fixed in 1.21.1-2.el9_4
  • krb5-server-ldap
    Fixed in 1.21.1-2.el9_4
  • krb5-workstation
    Fixed in 1.21.1-2.el9_4
  • libkadm5
    Fixed in 1.21.1-2.el9_4

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Arch Linux

  • krb5
    Fixed in 1.21.3-1

Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.

CloudLinux 8

  • krb5-devel
    Fixed in 1.18.2-29.el8_10
  • krb5-libs
    Fixed in 1.18.2-29.el8_10
  • krb5-pkinit
    Fixed in 1.18.2-29.el8_10
  • krb5-server
    Fixed in 1.18.2-29.el8_10
  • krb5-server-ldap
    Fixed in 1.18.2-29.el8_10
  • krb5-workstation
    Fixed in 1.18.2-29.el8_10
  • libkadm5
    Fixed in 1.18.2-29.el8_10

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 9

  • krb5-devel
    Fixed in 1.21.1-2.el9_4
  • krb5-libs
    Fixed in 1.21.1-2.el9_4
  • krb5-pkinit
    Fixed in 1.21.1-2.el9_4
  • krb5-server
    Fixed in 1.21.1-2.el9_4
  • krb5-server-ldap
    Fixed in 1.21.1-2.el9_4
  • krb5-workstation
    Fixed in 1.21.1-2.el9_4
  • libkadm5
    Fixed in 1.21.1-2.el9_4

Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 12

  • krb5
    Fixed in 1.20.1-2+deb12u2

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • krb5
    Fixed in 1.21.3-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • krb5
    Fixed in 1.21.3-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 20.04 LTS

  • krb5
    Fixed in 1.17-6ubuntu4.6

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 22.04 LTS

  • krb5
    Fixed in 1.19.2-2ubuntu0.4

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 24.04 LTS

  • krb5
    Fixed in 1.20.1-6ubuntu2.1

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 14.04 LTS

  • krb5
    Fixed in 1.12+dfsg-2ubuntu5.4+esm5
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 16.04 LTS

  • krb5
    Fixed in 1.13.2+dfsg-5ubuntu2.2+esm5
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 18.04 LTS

  • krb5
    Fixed in 1.16-2ubuntu0.4+esm2
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.