CVE-2021-3738 — Use After Free in Samba
Severity
8.8HIGHNVD
OSV5.9
EPSS
0.4%
top 39.20%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedMar 2
Latest updateMar 8
Description
In DCE/RPC it is possible to share the handles (cookies for resource state) between multiple connections via a mechanism called 'association groups'. These handles can reference connections to our sam.ldb database. However while the database was correctly shared, the user credentials state was only pointed at, and when one connection within that association group ended, the database would be left pointing at an invalid 'struct session_info'. The most likely outcome here is a crash, but it is pos…
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 2.8 | Impact: 5.9
Affected Packages8 packages
▶CVEListV5samba/sambaAffects all versions since samba 4.0 | Fixedin samba v4.15.2, v4.14.10 and v4.13.14
Patches
🔴Vulnerability Details
5GHSA▶
GHSA-jrfc-f73c-qmrr: In DCE/RPC it is possible to share the handles (cookies for resource state) between multiple connections via a mechanism called 'association groups'↗2022-03-04
OSV▶
CVE-2021-3738: In DCE/RPC it is possible to share the handles (cookies for resource state) between multiple connections via a mechanism called 'association groups'↗2022-03-02
📋Vendor Advisories
6Microsoft▶
In DCE/RPC it is possible to share the handles (cookies for resource state) between multiple connections via a mechanism called 'association groups'. These handles can reference connections to our sam↗2022-03-08