Heap-based buffer overflow in FreeRDP - CVE-2018-8786

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Main Vulnerability Database Vulnerabilities #VU16592

Heap-based buffer overflow in FreeRDP - CVE-2018-8786

Published: December 18, 2018 / Updated: May 18, 2020


Vulnerability identifier: #VU16592
CSH Severity: High
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2018-8786
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability: Public exploit is available

Vulnerability details

The vulnerability allows a remote authenticated attacker to cause DoS condition or execute arbitrary code.

The vulnerability exists due to improper handling of bitmaps by the update_read_bitmap_update() function, as defined in the update.c source code file. A remote attacker can send a specially crafted request that submits malicious input, trigger a heap-based buffer overflow condition that the attacker can use to cause a DoS condition or execute arbitrary code with elevated privileges.

Successful exploitation of the vulnerability may result in system compromise.


Affected software

FreeRDP
freerdp (Ubuntu package)
freerdp (Alpine package)
remmina
pidgin-sipe
freerdp
gnome-boxes
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power
Opensuse
Fedora

How to mitigate CVE-2018-8786

Update to version 2.0.0-rc4.

FreeRDP - update to 2.0.0 rc4
freerdp (Ubuntu package) - addressed in versions 1.1.0~git20140921.1.440916e+dfsg1-15ubuntu1.18.04.1, 1.1.0~git20140921.1.440916e+dfsg1-15ubuntu1.18.10.1
freerdp (Alpine package) - addressed in versions 2.0.0_rc4-r0, 2.0.0-r0
remmina - addressed in versions 1.3.3-1.fc28, 1.3.3-1.fc29
pidgin-sipe - addressed in versions 1.24.0-3.fc28, 1.24.0-3.fc29
freerdp - addressed in versions 2.0.0-48.20190228gitce386c8.fc29, 2.0.0-49.20190304git435872b.fc28
gnome-boxes - addressed in versions 3.28.5-2.fc28, 3.30.3-2.fc29

Links to Public Exploits and PoC-codes

External References

Related Security Bulletins