Published:2013/03/18  Last Updated:2013/03/18

JVN#52492830
VxWorks SSH server (IPSSH) denial-of-service (DoS) vulnerability

Overview

The SSH server (IPSSH) implementation in VxWorks contains a denial-of-service (DoS) vulnerability.

Products Affected

  • VxWorks versions 6.5 through 6.9

Description

The SSH server (IPSSH) implementation in VxWorks contains a denial-of-service vulnerability due to an issue in processing pty requests.

Impact

Receiving a specially crafted pty request packet may cause SSH access to be unavailable until the next reboot.

Solution

Apply a patch
Apply the appropriate patch according to the information provided by the developer.

Vendor Status

Vendor Status Last Update Vendor Notes
Wind River Systems Vulnerable 2013/03/18

References

JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

Analyzed on 2013.03.18

Measures Conditions Severity
Access Required can be attacked over the Internet using packets
  • High
Authentication login caused to be created by an administrator
  • Low-Mid
User Interaction Required the vulnerability can be exploited without an honest user taking any action
  • High
Exploit Complexity some expertise and/or luck required (most buffer overflows, guessing correctly in small space, expertise in Windows function calls)
  • Mid-High

Description of each analysis measures

Credit

Hisashi Kojima and Masahiro Nakada of Fujitsu Laboratories Ltd. reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.

Other Information

JPCERT Alert
JPCERT Reports
CERT Advisory
CPNI Advisory
TRnotes
CVE CVE-2013-0713
JVN iPedia JVNDB-2013-000020