CVE-2020-28196
Published: 6 November 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.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
krb5 Launchpad, Ubuntu, Debian |
bionic |
Released
(1.16-2ubuntu0.2)
|
| focal |
Released
(1.17-6ubuntu4.1)
|
|
| trusty |
Released
(1.12+dfsg-2ubuntu5.4+esm2)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
| upstream |
Needs triage
|
|
| xenial |
Released
(1.13.2+dfsg-5ubuntu2.2)
|
|
| groovy |
Released
(1.17-10ubuntu0.1)
|
|
|
Patches: upstream: https://github.com/krb5/krb5/commit/57415dda6cf04e73ffc3723be518eddfae599bfd |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.5 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |