CVE-2020-28196

MEDIUM

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.

References

https://github.com/krb5/krb5/commit/57415dda6cf04e73ffc3723be518eddfae599bfd

https://lists.debian.org/debian-lts-announce/2020/11/msg00011.html

https://lists.fedoraproject.org/archives/list/[email protected]/message/45KKOZQWIIIW5C45PJVGQ32AXBSYNBE7/

https://lists.fedoraproject.org/archives/list/[email protected]/message/73IGOG6CZAVMVNS4GGRMOLOZ7B6QVA7F/

https://lists.fedoraproject.org/archives/list/[email protected]/message/KPH2V3WSQTELROZK3GFCPQDOFLKIZ6H5/

https://security.gentoo.org/glsa/202011-17

https://www.debian.org/security/2020/dsa-4795

Details

Source: MITRE

Published: 2020-11-06

Updated: 2020-11-22

Type: CWE-674

Risk Information

CVSS v2.0

Base Score: 5

Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

Impact Score: 2.9

Exploitability Score: 10

Severity: MEDIUM

CVSS v3.0

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Impact Score: 3.6

Exploitability Score: 3.9

Severity: HIGH