SSH Windows client URL buffer overflow

ssh-client-url-bo (10723) The risk level is classified as HighHigh Risk

Description:

SSH (Secure Shell) is vulnerable to a buffer overflow, caused by improper bounds checking in the URL capturing mechanism. By sending an SSH client a URL of more than 480 characters, a remote attacker could overflow a buffer and execute arbitrary code on the victim's system, once the link is clicked from within the SSH terminal window.

Platforms Affected:

  • SSH, Secure Shell 3.1
  • SSH, Secure Shell 3.1.1
  • SSH, Secure Shell 3.1.2
  • SSH, Secure Shell 3.1.3
  • SSH, Secure Shell 3.1.4
  • SSH, Secure Shell 3.2

Remedy:

Upgrade to the latest version of SSH (3.1.5 or later) or (3.2.2 or later), available from the SSH Communications Security Web site. See References.

Consequences:

Gain Access

References:

  • SSH Communications Security Web site, SSH : Support : Downloads at http://www.ssh.com/support/downloads/.
  • SSH News Room Article 287, SSH Secure Shell 3.1 to 3.2.0 Windows client URL catcher buffer overflow vulnerability at http://www.ssh.com/company/newsroom/article/287/.
  • BID-6263: SSH Communications Secure Shell Windows Client URL Catcher Buffer Overflow Vulnerability
  • CVE-2002-1645: Buffer overflow in the URL catcher feature for SSH Secure Shell for Workstations client 3.1 to 3.2.0 allows remote attackers to execute arbitrary code via a long URL.
  • US-CERT VU#140977: SSH Secure Shell for Workstations contains buffer overflow in URL-handling feature

Reported:

Nov 25, 2002

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