CVE-2020-28196 — Uncontrolled Recursion in Kerberos 5

CWE-674 — Uncontrolled Recursion11 documents9 sources
Severity
7.5HIGHNVD
EPSS
1.3%
top 20.30%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
7
MIT Krb5MIT Kerberos 5Oracle Mysql Server+4 more
Timeline
PublishedNov 6
Latest updateMay 24

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 vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages6 packages

▶NVDmit/kerberos_51.18.0 — 1.18.3+1
▶Debianmit/krb5< 1.18.3-1+3

Also affects: Fedora 31

Patches

Patch: github.com ↗Patch: www.oracle.com ↗Patch: www.oracle.com ↗

🔴Vulnerability Details

3
GHSA
GHSA-2wgw-3mv7-47xf: MIT Kerberos 5 (aka krb5) before 1↗2022-05-24
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CVEList
CVE-2020-28196: MIT Kerberos 5 (aka krb5) before 1↗2020-11-06
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OSV
CVE-2020-28196: MIT Kerberos 5 (aka krb5) before 1↗2020-11-06
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📋Vendor Advisories

7
Oracle
Oracle Oracle Communications Risk Matrix: Policy (MIT Kerberos) — CVE-2020-28196↗2022-04-15
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Oracle
Oracle Oracle Communications Applications Risk Matrix: NM Core (Kerberos) — CVE-2020-28196↗2021-07-15
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Oracle
Oracle Oracle MySQL Risk Matrix: Server: Security: Encryption (MIT Kerberos) — CVE-2020-28196↗2021-04-15
▶
Ubuntu
Kerberos vulnerability↗2020-11-17
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Microsoft
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 le↗2020-11-10
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CVE-2020-28196 — Uncontrolled Recursion in Kerberos 5 | cvebase