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CVE
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CVE-2018-16851Date: (C)2018-12-05   (M)2023-12-22


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.

CVSS Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:CVSS V2 Severity:
CVSS Score : 6.5CVSS Score : 4.0
Exploit Score: 2.8Exploit Score: 8.0
Impact Score: 3.6Impact Score: 2.9
 
CVSS V3 Metrics:CVSS V2 Metrics:
Attack Vector: NETWORKAccess Vector: NETWORK
Attack Complexity: LOWAccess Complexity: LOW
Privileges Required: LOWAuthentication: SINGLE
User Interaction: NONEConfidentiality: NONE
Scope: UNCHANGEDIntegrity: NONE
Confidentiality: NONEAvailability: PARTIAL
Integrity: NONE 
Availability: HIGH 
  
Reference:
BID-106027
DSA-4345
GLSA-202003-52
USN-3827-1
USN-3827-2
https://lists.debian.org/debian-lts-announce/2018/12/msg00005.html
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16851
https://security.netapp.com/advisory/ntap-20181127-0001/
https://www.samba.org/samba/security/CVE-2018-16851.html

CPE    7
cpe:/o:debian:debian_linux:9.0
cpe:/a:samba:samba
cpe:/o:canonical:ubuntu_linux:12.04::~~esm~~~
cpe:/o:debian:debian_linux:8.0
...
CWE    1
CWE-476
OVAL    10
oval:org.secpod.oval:def:1000488
oval:org.secpod.oval:def:1000446
oval:org.secpod.oval:def:704400
oval:org.secpod.oval:def:603576
...

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