Information disclosure in Linux kernel - CVE-2019-11884

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Main Vulnerability Database Vulnerabilities #VU20811

Information disclosure in Linux kernel - CVE-2019-11884

Published: September 3, 2019


Vulnerability identifier: #VU20811
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-11884
CWE-ID: CWE-200
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability in the "do_hidp_sock_ioctl" function in "net/bluetooth/hidp/sock.c" exists due to the Bluetooth Human Interface Device Protocol (HIDP) implementation did not properly verify strings were NULL terminated in certain situations. A local authenticated user can gain unauthorized access to sensitive information from kernel stack memory via a "HIDPCONNADD" command, because a name field may not end with a '' character. 


Affected software

Linux kernel
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power 9
Red Hat Enterprise Linux for IBM System z (Structure A)
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux for Real Time for NFV
Fedora
kernel-alt (Red Hat package)
kernel-rt (Red Hat package)
kernel
kernel-headers

How to mitigate CVE-2019-11884

Install updates from vendor's website.

Linux kernel - update to 5.0.15
kernel-alt (Red Hat package) - update to 4.14.0-115.18.1.el7a
kernel-rt (Red Hat package) - update to 4.18.0-147.rt24.93.el8
kernel - addressed in versions 5.0.16-100.fc28, 5.0.16-200.fc29, 5.0.16-300.fc30
kernel-headers - addressed in versions 5.0.16-100.fc28, 5.0.16-200.fc29, 5.0.16-300.fc30

External References

Related Security Bulletins