CVE-2020-14303 — Excessive Iteration in Samba

CWE-834 — Excessive IterationCWE-20 — Improper Input ValidationCWE-400 — Uncontrolled Resource Consumption10 documents8 sources
Severity
7.5HIGHNVD
EPSS
26.4%
top 3.68%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
5
SambaCanonical Ubuntu LinuxDebian Linux+2 more
Timeline
PublishedJul 6
Latest updateMay 24

Description

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages4 packages

▶NVDsamba/samba4.10.0 — 4.10.17+2
▶Debiansamba/samba< 2:4.12.5+dfsg-1+3
▶CVEListV5samba/sambaAll Samba versions before 4.10.17, before 4.11.11 and before 4.12.4
▶NVDopensuse/leap15.1, 15.2+1

Also affects: Debian Linux 9.0, Fedora 31, Ubuntu Linux 12.04, 14.04, 16.04, 18.04, 20.04

🔴Vulnerability Details

3
GHSA
GHSA-gm89-9qf3-7p24: A flaw was found in the AD DC NBT server in all Samba versions before 4↗2022-05-24
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OSV
CVE-2020-14303: A flaw was found in the AD DC NBT server in all Samba versions before 4↗2020-07-06
▶
CVEList
CVE-2020-14303: A flaw was found in the AD DC NBT server in all Samba versions before 4↗2020-07-06
▶

📋Vendor Advisories

4
Ubuntu
Samba vulnerability↗2020-08-10
▶
Ubuntu
Samba vulnerability↗2020-08-10
▶
Red Hat
samba: Empty UDP packet DoS in Samba AD DC nbtd↗2020-07-02
▶
Debian
CVE-2020-14303: samba - A flaw was found in the AD DC NBT server in all Samba versions before 4.10.17, b...↗2020
▶

💬Community

2
Bugzilla
CVE-2020-14303 samba: Empty UDP packet DoS in Samba AD DC nbtd [fedora-all]↗2020-07-02
▶
Bugzilla
CVE-2020-14303 samba: Empty UDP packet DoS in Samba AD DC nbtd↗2020-06-26
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CVE-2020-14303 — Excessive Iteration in Samba | cvebase