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4.9

Cisco NX‑OS on ASR 9000 can crash after config commit

CVE-2015-4277 · published 11 years ago
Summary

On Cisco ASR 9000 routers running NX‑OS version 5.1.3 or 5.3.0, a mistake in the global configuration process can close remote console sessions incorrectly after a commit, letting a local user trigger a device hang by creating temporary files and using memory. This can cause the router to become unresponsive, affecting network availability. Apply the Cisco‑provided software update or patch and limit local console access until the fix is installed.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
cisco nx-os 5.1.3
5.3.0
cpe:2.3:o:cisco:nx-os:5.1.3:*:*:*:*:*:*:*
Original advisory text
The global-configuration implementation on Cisco ASR 9000 devices with software 5.1.3 and 5.3.0 improperly closes vty sessions after a commit/end operation, which allows local users to cause a deni...
The global-configuration implementation on Cisco ASR 9000 devices with software 5.1.3 and 5.3.0 improperly closes vty sessions after a commit/end operation, which allows local users to cause a denial of service (tmp/*config file creation, memory consumption, and device hang) via unspecified vectors, aka Bug ID CSCut93842.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit (estimated)
  • Gives an attacker partial control (estimated)
Severity
4.9 Medium
Exploitation
<1% chance of attack within 30 days
Type
CWE-399Resource Management Errors
Timeline
Published19 Aug 2015
Updated4 Nov 2026
First seen29 Sep 2026
Sources
CVE-2015-4277 · NVD
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