Vulnerability CVE-2019-14907
Published: 2020-01-21

Description:
All samba versions 4.9.x before 4.9.18, 4.10.x before 4.10.12 and 4.11.x before 4.11.5 have an issue where if it is set with "log level = 3" (or above) then the string obtained from the client, after a failed character conversion, is printed. Such strings can be provided during the NTLMSSP authentication exchange. In the Samba AD DC in particular, this may cause a long-lived process(such as the RPC server) to terminate. (In the file server case, the most likely target, smbd, operates as process-per-client and so a crash there is harmless).

Type:

CWE-125

 (Out-of-bounds Read)

CVSS2 => (AV:N/AC:M/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.3/10
2.9/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
Synology -> Directory server 
Synology -> Diskstation manager 
Synology -> Router manager 
Synology -> Skynas 
Samba -> Samba 
Redhat -> Storage 
Redhat -> Enterprise linux 
Canonical -> Ubuntu linux 

 References:
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00055.html
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14907
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GQ6U65I2K23YJC4FESW477WL55TU3PPT/
https://security.netapp.com/advisory/ntap-20200122-0001/
https://usn.ubuntu.com/4244-1/
https://www.samba.org/samba/security/CVE-2019-14907.html
https://www.synology.com/security/advisory/Synology_SA_20_01
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