CVE-2019-14907 Information

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).

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Reference

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/4ACZVNMIFQGGXNJPMHAVBN3H2U65FXQY/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GQ6U65I2K23YJC4FESW477WL55TU3PPT/ https://security.gentoo.org/glsa/202003-52 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

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

6.5