CVE-2020-28196

HIGH EPSS 90.0%
Published Nov 6, 20205y ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published Nov 6, 2020 5y ago
Last Modified Jun 17, 2026 2w ago

Description

MIT Kerberos 5 (aka krb5) before 1.17.2 and 1.18.x before 1.18.3 allows unbounded recursion via an ASN.1-encoded Kerberos message because the lib/krb5/asn.1/asn1_encode.c support for BER indefinite lengths lacks a recursion limit.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
90.0% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-674

Affected Products 13

VendorProductVersionRange
mitkerberos_5* <1.17.2
mitkerberos_5*≥1.18.0  –  <1.18.3
fedoraprojectfedora31any
netappactive_iq_unified_manager*any
netappactive_iq_unified_manager*any
netappcloud_backup*any
netapponcommand_insight*any
netapponcommand_workflow_automation*any
netappsnapcenter*any
oraclecommunications_cloud_native_core_policy1.14.0any
oraclecommunications_offline_mediation_controller12.0.0.3.0any
oraclecommunications_pricing_design_center12.0.0.3.0any
oraclemysql_server* ≤8.0.23

References 14

  • github.com https://github.com/krb5/krb5/commit/57415dda6cf04e73ffc3723be518eddfae599bfd
    PatchThird Party Advisory
  • lists.apache.org https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
  • lists.apache.org https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2020/11/msg00011.html
    Mailing ListThird Party Advisory
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/45KKOZQWIIIW5C45PJVGQ32AXBSYNBE7/
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/73IGOG6CZAVMVNS4GGRMOLOZ7B6QVA7F/
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KPH2V3WSQTELROZK3GFCPQDOFLKIZ6H5/
  • security.gentoo.org https://security.gentoo.org/glsa/202011-17
    Third Party Advisory
  • security.netapp.com https://security.netapp.com/advisory/ntap-20201202-0001/
    Third Party Advisory
  • security.netapp.com https://security.netapp.com/advisory/ntap-20210513-0002/
    Third Party Advisory
  • debian.org https://www.debian.org/security/2020/dsa-4795
    Third Party Advisory
  • oracle.com https://www.oracle.com//security-alerts/cpujul2021.html
    PatchThird Party Advisory
  • oracle.com https://www.oracle.com/security-alerts/cpuApr2021.html
    PatchThird Party Advisory
  • oracle.com https://www.oracle.com/security-alerts/cpuapr2022.html
    PatchThird Party Advisory

Remediation

  • github.com https://github.com/krb5/krb5/commit/57415dda6cf04e73ffc3723be518eddfae599bfd
    PatchThird Party Advisory
  • oracle.com https://www.oracle.com//security-alerts/cpujul2021.html
    PatchThird Party Advisory
  • oracle.com https://www.oracle.com/security-alerts/cpuApr2021.html
    PatchThird Party Advisory
  • oracle.com https://www.oracle.com/security-alerts/cpuapr2022.html
    PatchThird Party Advisory