CVE-2018-16851
Medium
Description
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.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Samba
PublishedNov 28, 2018
First seenNov 28, 2018
Weakness typeCWE-476NULL pointer dereference
How to fix
Update
- samba samba4.7.12, 4.8.7, 4.9.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| samba samba | 4.0.0 ≤ v < 4.7.12, 4.8.0 ≤ v < 4.8.7, 4.9.0 ≤ v < 4.9.3 | 4.7.12, 4.8.7, 4.9.3 |
| canonical ubuntu_linux | 12.04, 14.04, 16.04, 18.04, 18.10 | — |
| debian debian_linux | 8.0, 9.0 | — |
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