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CVE-2019-14907

Published: 21 January 2020

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).

Priority

Low

Cvss 3 Severity Score

6.5

Score breakdown

Status

Package Release Status
samba
Launchpad, Ubuntu, Debian
bionic
Released (2:4.7.6+dfsg~ubuntu-0ubuntu2.15)
disco
Released (2:4.10.0+dfsg-0ubuntu2.8)
eoan
Released (2:4.10.7+dfsg-0ubuntu2.4)
focal
Released (2:4.11.5+dfsg-1ubuntu1)
trusty Needed

hirsute
Released (2:4.11.5+dfsg-1ubuntu1)
groovy
Released (2:4.11.5+dfsg-1ubuntu1)
impish
Released (2:4.11.5+dfsg-1ubuntu1)
jammy
Released (2:4.11.5+dfsg-1ubuntu1)
kinetic
Released (2:4.11.5+dfsg-1ubuntu1)
lunar
Released (2:4.11.5+dfsg-1ubuntu1)
upstream
Released (4.11.5,4.10.12)
xenial
Released (2:4.3.11+dfsg-0ubuntu0.16.04.25)
mantic
Released (2:4.11.5+dfsg-1ubuntu1)

Severity score breakdown

Parameter Value
Base score 6.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H