CVE-2017-2342 SRX Series: MACsec failure to report errors

High 8.1 Published 14 Jul 2017 Updated 16 Sep 2024

MACsec silently falls back to unencrypted links on unsupported ports, misleading administrators into believing traffic is secure.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2017-2342?

CVE-2017-2342 is a high-severity vulnerability in Juniper Junos, published on 14 Jul 2017. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

MACsec feature on Juniper Networks Junos OS 15.1X49 prior to 15.1X49-D100 on SRX300 series does not report errors when a secure link can not be established. It falls back to an unencrypted link. This can happen when MACsec is configured on ports that are not capable of MACsec or when a secure link can not be established. This can mislead customers into believing that a link is secure. On SRX 300 series devices, prior to 15.1X49-D100, MACsec was only supported on control and fabric ports of SRX340 and SRX345 devices. SRX300 and and SRX320 did not have any MACsec capable ports. Configuring MACsec on ports that were not MACsec capable would have resulted in this issue. Affected releases are Juniper Networks Junos OS 15.1X49 prior to 15.1X49-D100 on SRX300 series.

Weakness: CWE-392

Which versions are affected by CVE-2017-2342?

It affects 1 product.

Products include Juniper Junos.

How do I fix CVE-2017-2342?

No fix has been published for CVE-2017-2342 yet. Limit exposure of the affected software until one is available.

Is CVE-2017-2342 being exploited?

There is no known exploitation of CVE-2017-2342 in the wild and no public exploit code.

All Juniper Junos vulnerabilities

Sources

Also known as GHSA-c2jv-35gj-wg4v.