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Test ID:1.3.6.1.4.1.25623.1.0.117278
Category:Denial of Service
Title:Samba 4.x Multiple DoS Vulnerabilities (Mar 2021)
Summary:Samba is prone to multiple Denial of Service (DoS); vulnerabilities.
Description:Summary:
Samba is prone to multiple Denial of Service (DoS)
vulnerabilities.

Vulnerability Insight:
The following flaws exist:

- CVE-2020-27840: Heap corruption via crafted DN strings. An anonymous attacker can
crash the Samba AD DC LDAP server by sending easily crafted DNs as part of a bind
request. More serious heap corruption is likely also possible.

- CVE-2021-20277: Out of bounds read in AD DC LDAP server. User-controlled LDAP filter
strings against the AD DC LDAP server may crash the LDAP server.

Affected Software/OS:
Samba version 4.0 and later.

Solution:
Update to version 4.12.12, 4.13.5, 4.14.0 or later.

CVSS Score:
5.0

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

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2020-27840
Debian Security Information: DSA-4884 (Google Search)
https://www.debian.org/security/2021/dsa-4884
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/X5J3B6PN5XMXF3OHYBNHDKZ3XFSUGY4L/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VLZ74IF2N75VQSIHBL4B3P5WKWQCXSRY/
https://security.gentoo.org/glsa/202105-22
https://bugzilla.redhat.com/show_bug.cgi?id=1941400
https://www.samba.org/samba/security/CVE-2020-27840.html
https://lists.debian.org/debian-lts-announce/2021/03/msg00036.html
Common Vulnerability Exposure (CVE) ID: CVE-2021-20277
https://bugzilla.redhat.com/show_bug.cgi?id=1941402
https://www.samba.org/samba/security/CVE-2021-20277.html
CopyrightCopyright (C) 2021 Greenbone Networks GmbH

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