Quick answers
- Is CVE-2016-10180 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2016-10180 being exploited in the wild.
- How severe is CVE-2016-10180?
- High severity, with a CVSS score of 7.5, published 30 January 2017.
- Which products and versions are affected?
- D-Link DWR-932B firmware revB 2.02.EU and earlier; D-Link DWR-932B Revision B.
- Is there a fix for CVE-2016-10180?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2016-10180 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2016-10180?
- Check whether you run Dlink Dwr-932b or Dlink Dwr-932b Firmware. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The D-Link DWR-932B (Revision B) router suffers from a weak pseudo-random number generator (PRNG) implementation in its WPS PIN generation logic. The firmware seeds the PRNG using 'srand(time(0))', where 'time(0)' represents the current Unix epoch time. Since the router synchronizes its clock via NTP, the seed value is highly predictable. An attacker can reverse-engineer the PIN generation algorithm and, by estimating the router's system time, generate a small set of potential WPS PINs. This significantly reduces the entropy of the 8-digit PIN, allowing for trivial brute-force attacks to gain unauthorized access to the wireless network. At the time of disclosure, no official patches were available for this legacy device.
Affected products
- D-Link DWR-932B firmware revB 2.02.EU and earlier
- D-Link DWR-932B Revision B
Timeline
- 2016-09-28: disclosed: Initial public disclosure by researcher Pierre Kim
- 2017-01-30: advisory: NVD publication date