CVE-2015-3963 Weak cryptography in n/a
Remote attackers can spoof TCP sessions by predicting weak initial sequence numbers in VxWorks, affecting industrial devices like Schneider Electric RTUs.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2015-3963?
CVE-2015-3963 is a medium-severity vulnerability in n/a, published on 4 Aug 2015. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Wind River VxWorks before 5.5.1, 6.5.x through 6.7.x before 6.7.1.1, 6.8.x before 6.8.3, 6.9.x before 6.9.4.4, and 7.x before 7 ipnet_coreip 1.2.2.0, as used on Schneider Electric SAGE RTU devices before J2 and other devices, does not properly generate TCP initial sequence number (ISN) values, which makes it easier for remote attackers to spoof TCP sessions by predicting an ISN value.
Weakness: CWE-330
Which versions are affected by CVE-2015-3963?
It affects 1 product.
Products include Windriver Vxworks.
How do I fix CVE-2015-3963?
No fix has been published for CVE-2015-3963 yet. Limit exposure of the affected software until one is available.
Is CVE-2015-3963 being exploited?
There is no known exploitation of CVE-2015-3963 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-76ph-2hxx-gxwj.