CVE-2020-27840
Published: 24 March 2021
A flaw was found in samba. Spaces used in a string around a domain name (DN), while supposed to be ignored, can cause invalid DN strings with spaces to instead write a zero-byte into out-of-bounds memory, resulting in a crash. The highest threat from this vulnerability is to system availability.
Priority
High
CVSS 3 base score: 7.5
Status
| Package | Release | Status |
|---|---|---|
|
ldb Launchpad, Ubuntu, Debian |
Upstream |
Needs triage
|
| Ubuntu 20.10 (Groovy Gorilla) |
Released
(2:2.1.4-2ubuntu0.1)
|
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Released
(2:2.0.10-0ubuntu0.20.04.3)
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(2:1.2.3-1ubuntu0.2)
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Released
(2:1.1.24-1ubuntu3.2)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Released
(1:1.1.24-0ubuntu0.14.04.2+esm1)
|
|
|
Patches: Upstream: https://bugzilla.samba.org/attachment.cgi?id=16460 (master) Upstream: https://bugzilla.samba.org/attachment.cgi?id=16462 (4.13) Upstream: https://bugzilla.samba.org/attachment.cgi?id=16463 (4.12) Upstream: https://bugzilla.samba.org/attachment.cgi?id=16464 (4.11) |
||
|
samba Launchpad, Ubuntu, Debian |
Upstream |
Needs triage
|
| Ubuntu 20.10 (Groovy Gorilla) |
Not vulnerable
(code not compiled)
|
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Not vulnerable
(code not compiled)
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Not vulnerable
(code not compiled)
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Not vulnerable
(code not compiled)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Not vulnerable
(code not compiled)
|
|
|
Patches: Upstream: https://bugzilla.samba.org/attachment.cgi?id=16460 (master) Upstream: https://bugzilla.samba.org/attachment.cgi?id=16462 (4.13) Upstream: https://bugzilla.samba.org/attachment.cgi?id=16463 (4.12) Upstream: https://bugzilla.samba.org/attachment.cgi?id=16464 (4.11) |
||
Notes
| Author | Note |
|---|---|
| mdeslaur | This issue is actually in the ldb package, the samba package uses the system ldb library, not the included one |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27840
- https://www.samba.org/samba/security/CVE-2020-27840.html
- https://ubuntu.com/security/notices/USN-4888-1
- https://ubuntu.com/security/notices/USN-4888-2
- NVD
- Launchpad
- Debian