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5.0

Juniper JUNOS can stop routing when flooded with MPLS traffic

CVE-2004-0467 · published 21 years ago
Summary

JUNOS versions 5.x through 7.x can have their routing function shut down if an attacker sends a large amount of special network packets (MPLS). The system doesn’t check these packets before processing them, which can slow down or halt normal traffic. Apply the latest updates from Juniper and enable any offered packet‑filtering options to protect your network.

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
juniper junos 5.0
5.1
5.2
5.3
5.4
5.5
5.6
5.7
6.1
6.2
6.3
cpe:2.3:o:juniper:junos:5.0:*:*:*:*:*:*:*
Original advisory text
Juniper JUNOS 5.x through JUNOS 7.x allows remote attackers to cause a denial of service (routing disabled) via a large number of MPLS packets, which are not filtered or verified before being sent ...
Juniper JUNOS 5.x through JUNOS 7.x allows remote attackers to cause a denial of service (routing disabled) via a large number of MPLS packets, which are not filtered or verified before being sent to the Routing Engine, which reduces the speed at which other packets are processed.
References
Fix within
Internet-facing 14 days
Internal 60 days
  • Not known to be exploited
  • Can be exploited automatically (estimated)
  • Gives an attacker partial control (estimated)
Severity
5.0 Medium
Exploitation
4% chance of attack within 30 days
Timeline
Published31 Dec 2004
Updated23 Oct 2026
First seen29 Sep 2026
Sources
CVE-2004-0467 · NVD
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