Buffer overflow in VxWorks - CVE-2019-12261
Published: July 31, 2019
Vulnerability identifier: #VU19582
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-12261
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when sending responses to TCP requests due to TCP Urgent Pointer state confusion during connect() to a remote host. A remote attacker can trigger the system to initiate TCP connection to a malicious host, trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
VxWorks
SIPROTEC 4 7SJ66
SIPROTEC 4 7SJ66
How to mitigate CVE-2019-12261
Install updates from vendor's website.
The vulnerability is fixed in:
VxWorks 6.9: update to version 6.9.4.12
VxWorks 7: update to versions 2.1.0.0 or 1.4.3.1.
VxWorks 6.9: update to version 6.9.4.12
VxWorks 7: update to versions 2.1.0.0 or 1.4.3.1.
SIPROTEC 4 7SJ66 - update to 4.41