Race condition in VxWorks - CVE-2019-12263
Published: July 31, 2019
Vulnerability identifier: #VU19583
CSH Severity: Low
CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-12263
CWE-ID: CWE-362
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform denial of service (DoS) attack.
The vulnerability exists due to a race condition when processing TCP packets. A remote unauthenticated attacker can send malicious sequence of TCP packets within a specific timing, trigger a race condition and perform denial of service attack.
Affected software
VxWorks
SIPROTEC 4 7SJ66
PowerConnect Series
SIPROTEC 4 7SJ66
PowerConnect Series
How to mitigate CVE-2019-12263
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
PowerConnect Series - update to 5.1.16.1
PowerConnect Series - update to 5.1.16.1