CVE-2021-20277 — Out-of-bounds Read in Samba

CWE-125 — Out-of-bounds ReadCWE-787 — Out-of-bounds Write10 documents7 sources
Severity
7.5HIGHNVD
EPSS
8.5%
top 7.62%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
9
SambaDebian LDBDebian Samba+6 more
Timeline
PublishedMay 12
Latest updateMay 24

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:HExploitability: 3.9 | Impact: 3.6

Affected Packages9 packages

▶NVDsamba/samba4.0.0 — 4.12.13+2
▶debiandebian/samba< ldb 2:2.2.0-3.1 (bullseye)
▶Debiansamba/samba< 2:4.13.13+dfsg-1+2
▶CVEListV5samba/sambasamba 4.14.1, samba 4.13.6, samba 4.12.13

Also affects: Debian Linux 10.0, 9.0, Fedora 32, 33, 34

🔴Vulnerability Details

4
GHSA
GHSA-96fm-7x9f-hmmw: A flaw was found in Samba's libldb↗2022-05-24
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OSV
CVE-2021-20277: A flaw was found in Samba's libldb↗2021-05-12
▶
OSV
ldb vulnerabilities↗2021-03-25
▶
OSV
ldb vulnerabilities↗2021-03-24
▶

📋Vendor Advisories

5
Microsoft
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 reques↗2021-05-11
▶
Ubuntu
ldb vulnerabilities↗2021-03-25
▶
Ubuntu
ldb vulnerabilities↗2021-03-24
▶
Red Hat
samba: Out of bounds read in AD DC LDAP server↗2021-03-24
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Debian
CVE-2021-20277: ldb - A flaw was found in Samba's libldb. Multiple, consecutive leading spaces in an L...↗2021
▶