CVE-2018-16851
Publication date 27 November 2018
Last updated 24 July 2024
Ubuntu priority
Samba from version 4.0.0 and before versions 4.7.12, 4.8.7, 4.9.3 is vulnerable to a denial of service. During the processing of an LDAP search before Samba's AD DC returns the LDAP entries to the client, the entries are cached in a single memory object with a maximum size of 256MB. When this size is reached, the Samba process providing the LDAP service will follow the NULL pointer, terminating the process. There is no further vulnerability associated with this issue, merely a denial of service.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| samba | ||
| 18.04 LTS bionic |
Fixed 2:4.7.6+dfsg~ubuntu-0ubuntu2.5
|
|
| 16.04 LTS xenial |
Fixed 2:4.3.11+dfsg-0ubuntu0.16.04.18
|
|
| 14.04 LTS trusty |
Fixed 2:4.3.11+dfsg-0ubuntu0.14.04.19
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
6.5 · Medium
|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
References
Related Ubuntu Security Notices (USN)
- USN-3827-2
- Samba vulnerabilities
- 27 November 2018
- USN-3827-1
- Samba vulnerabilities
- 27 November 2018