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5.0

Juniper Netscreen ScreenOS SSH crash can stop device

CVE-2002-1547 · published 23 years ago
Summary

Devices running Juniper Netscreen ScreenOS version 4.0.0r6 or earlier can be forced to stop working if an attacker sends a specially crafted SSH message to the management console. This makes the device unavailable until it is restarted. Apply the latest ScreenOS update from Juniper to protect your equipment.

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 netscreen_screenos <= 4.0.0r6
cpe:2.3:o:juniper:netscreen_screenos:*:*:*:*:*:*:*:*
Original advisory text
Netscreen running ScreenOS 4.0.0r6 and earlier allows remote attackers to cause a denial of service via a malformed SSH packet to the Secure Command Shell (SCS) management interface, as demonstrate...
Netscreen running ScreenOS 4.0.0r6 and earlier allows remote attackers to cause a denial of service via a malformed SSH packet to the Secure Command Shell (SCS) management interface, as demonstrated via certain CRC32 exploits, a different vulnerability than CVE-2001-0144.
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 Mar 2003
Updated4 Nov 2026
First seen29 Sep 2026
Sources
CVE-2002-1547 · NVD
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