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CVE-2020-28196

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Date: November 6, 2020

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.

Language: C

Severity Score

Related Resources (20)

https://security.netapp.com/advisory/ntap-20210513-0002/
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4@%3Cissues.bookkeeper.apache.org%3E
https://people.canonical.com/~ubuntu-security/cve/CVE-2020-28196
https://www.oracle.com/security-alerts/cpuApr2021.html
https://security-tracker.debian.org/tracker/CVE-2020-28196
https://www.debian.org/security/2020/dsa-4795
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/45KKOZQWIIIW5C45PJVGQ32AXBSYNBE7/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KPH2V3WSQTELROZK3GFCPQDOFLKIZ6H5/
https://nvd.nist.gov/vuln/detail/CVE-2020-28196
https://access.redhat.com/security/cve/CVE-2020-28196
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b@%3Cissues.bookkeeper.apache.org%3E
https://security.netapp.com/advisory/ntap-20201202-0001/
https://github.com/krb5/krb5/commit/57415dda6cf04e73ffc3723be518eddfae599bfd
https://security.gentoo.org/glsa/202011-17
https://lists.debian.org/debian-lts-announce/2020/11/msg00011.html
https://security.alpinelinux.org/vuln/CVE-2020-28196
https://www.oracle.com//security-alerts/cpujul2021.html
https://www.oracle.com/security-alerts/cpuapr2022.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/73IGOG6CZAVMVNS4GGRMOLOZ7B6QVA7F/
https://www.mend.io/vulnerability-database/CVE-2020-28196

Severity Score

Weakness Type (CWE)

Uncontrolled Recursion

CWE-674

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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