Memory leak in Samba - CVE-2017-12163

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Main Vulnerability Database Vulnerabilities #VU8518

Memory leak in Samba - CVE-2017-12163

Published: September 20, 2017


Vulnerability identifier: #VU8518
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2017-12163
CWE-ID: CWE-401
Exploitation vector: Adjecent network
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to memory information leak over SMB1. A client with write access to a share can cause server memory contents to be written into a file or printer. Some SMB1 write requests were not correctly range checked to ensure the client had sent enough data to fulfill the write, allowing server memory contents to be written into the file (or printer) instead of client supplied data. The client cannot control the area of the server memory that is written to the file (or printer).

Affected software

Samba
Debian Linux
Amazon Linux AMI
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux EUS Compute Node
Ubuntu
Slackware Linux
Fedora
Red Hat Gluster Storage Server for On-premise
samba (Alpine package)
samba
RoboHelp

How to mitigate CVE-2017-12163


samba (Alpine package) - update to 4.4.16-r0
samba - addressed in versions 4.5.14-0.fc25, 4.6.8-0.fc26, 4.7.0-12.fc27

External References

Related Security Bulletins