CVE-2020-27840 Information

Description

A flaw was found in samba. Spaces used in a string around a domain name (DN) while supposed to be ignored can cause invalid DN strings with spaces to instead write a zero-byte into out-of-bounds memory resulting in a crash. The highest threat from this vulnerability is to system availability.

CVSS Vector

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

Reference

https://bugzilla.redhat.com/show_bug.cgi?id=1941400 https://lists.debian.org/debian-lts-announce/2021/03/msg00036.html https://security.netapp.com/advisory/ntap-20210326-0007/ https://www.samba.org/samba/security/CVE-2020-27840.html https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZXP3ONIY6MB4C5LDZV4YL5KJCES3UX24/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VLZ74IF2N75VQSIHBL4B3P5WKWQCXSRY/ https://www.debian.org/security/2021/dsa-4884 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/X5J3B6PN5XMXF3OHYBNHDKZ3XFSUGY4L/ https://security.gentoo.org/glsa/202105-22

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5