high
7.5
CWE
834
Advisory Published
CVE Published
CVE Published
Updated

CVE-2020-14303

First published: Fri Jun 26 2020(Updated: )

A flaw was found in the AD DC NBT server in all Samba versions before 4.10.17, before 4.11.11 and before 4.12.4. A samba user could send an empty UDP packet to cause the samba server to crash.

Credit: secalert@redhat.com secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
Samba Samba>=4.10.0<4.10.17
Samba Samba>=4.11.0<4.11.11
Samba Samba>=4.12.0<4.12.4
Fedoraproject Fedora=31
openSUSE Leap=15.1
openSUSE Leap=15.2
Debian Debian Linux=9.0
Canonical Ubuntu Linux=12.04
Canonical Ubuntu Linux=14.04
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Canonical Ubuntu Linux=20.04
redhat/samba<4.10.17
4.10.17
redhat/samba<4.11.11
4.11.11
redhat/samba<4.12.4
4.12.4
ubuntu/samba<2:4.7.6+dfsg~ubuntu-0ubuntu2.18
2:4.7.6+dfsg~ubuntu-0ubuntu2.18
ubuntu/samba<2:4.11.6+dfsg-0ubuntu1.4
2:4.11.6+dfsg-0ubuntu1.4
ubuntu/samba<2:4.3.11+dfsg-0ubuntu0.14.04.20+
2:4.3.11+dfsg-0ubuntu0.14.04.20+
ubuntu/samba<2:4.3.11+dfsg-0ubuntu0.16.04.29
2:4.3.11+dfsg-0ubuntu0.16.04.29
debian/samba
2:4.13.13+dfsg-1~deb11u6
2:4.17.12+dfsg-0+deb12u1
2:4.21.0~rc1+really4.20.4+dfsg-1

Remedy

https://github.com/samba-team/samba/commit/3cc0f1eeda5f133532dda31eef9fc1b394127e50

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2020-14303?

    CVE-2020-14303 is a vulnerability found in the AD DC NBT server in all Samba versions before 4.10.17, before 4.11.11, and before 4.12.4.

  • What is the severity of CVE-2020-14303?

    The severity of CVE-2020-14303 is high, with a severity value of 7.5.

  • How does CVE-2020-14303 affect Samba?

    CVE-2020-14303 in Samba allows a user to send an empty UDP packet, causing the Samba server to crash.

  • Which versions of Samba are affected by CVE-2020-14303?

    All Samba versions before 4.10.17, before 4.11.11, and before 4.12.4 are affected by CVE-2020-14303.

  • Where can I find more information about CVE-2020-14303?

    You can find more information about CVE-2020-14303 at the following references: [1], [2], [3].

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