CVE-2021-20277 Information

Description

A flaw was found in Samba’s libldb. Multiple consecutive leading spaces in an LDAP attribute can lead to an out-of-bounds memory write leading to a crash of the LDAP server process handling the request. 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://lists.debian.org/debian-lts-announce/2021/03/msg00036.html https://bugzilla.redhat.com/show_bug.cgi?id=1941402 https://www.samba.org/samba/security/CVE-2021-20277.html https://security.netapp.com/advisory/ntap-20210326-0007/ 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