CVE-2015-7256 Weak cryptography in n/a
ZyXEL network devices use non-unique X.509 certificates and SSH host keys, enabling man-in-the-middle attacks and impersonation.
- 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-2015-7256?
CVE-2015-7256 is a medium-severity vulnerability in n/a, published on 27 Sep 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
ZyXEL NWA1100-N, NWA1100-NH, NWA1121-NI, NWA1123-AC, and NWA1123-NI access points; P-660HN-51, P-663HN-51, VMG1312-B10A, VMG1312-B30A, VMG1312-B30B, VMG4380-B10A, VMG8324-B10A, VMG8924-B10A, VMG8924-B30A, and VSG1435-B101 DSL CPEs; PMG5318-B20A GPONs; SBG3300-N000, SBG3300-NB00, and SBG3500-N000 small business gateways; GS1900-8 and GS1900-24 switches; and C1000Z, Q1000, FR1000Z, and P8702N project models use non-unique X.509 certificates and SSH host keys.
Weakness: CWE-310
Which versions are affected by CVE-2015-7256?
It affects 25 products.
Products include Zyxel C1000z Firmware, Zyxel Fr1000z Firmware, Zyxel Gs1900-24 Firmware, Zyxel Gs1900-8 Firmware, Zyxel Nwa1100-N Firmware, Zyxel Nwa1100-Nh Firmware and 19 more.
How do I fix CVE-2015-7256?
No fix has been published for CVE-2015-7256 yet. Limit exposure of the affected software until one is available.
Is CVE-2015-7256 being exploited?
There is no known exploitation of CVE-2015-7256 in the wild and no public exploit code.
Sources
Also known as GHSA-36v6-x937-539h.