49 lines
No EOL
1.6 KiB
Text
49 lines
No EOL
1.6 KiB
Text
The Grandstream GXV3275 is an Android-based VoIP phone. Several
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vulnerabilities were found affecting this device.
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* The device ships with a default root SSH key, which could be used as a
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backdoor:
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/system/root/.ssh # cat authorized_keys
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Public key portion is:
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ssh-rsa
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AAAAB3NzaC1yc2EAAAADAQABAAAAgwCIcYbgmdHTpTeDcBA4IOg5Z7d2By0GXGihZzcTxZC+YTWGUe/HJc+pYDpDrGMWg0hMqd+JPs1GaLNw4pw0Mip6VMT7VjoZ8Z+n2ULNyK1IoTU4C3Ea4vcYVR8804Pvh9vXxC0iuMEr1Jx7SewUwSlABX04uVpEObgnUhpi+hn/H34/
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jhzhao@jhzhao-Lenovo
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Fingerprint: md5 7b:6e:a0:00:19:54:a6:39:84:1f:f9:18:2e:79:61:b5
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This issue has not been resolved.
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* The SSH interface only provides access to a limited CLI. The CLI's ping
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and traceroute commands will pass user input as parameters to underlying
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system commands without escaping shell metacharacters. This can be
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exploited to break out to a shell:
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GXV3275 > traceroute $(sh)
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This shell will only see stderr, so we then need to run sh with stdout
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redirected to stderr:
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sh 1>&2
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This issue has been resolved in firmware version 1.0.3.30.
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* The web interface exposes an undocumented command execution API:
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http://DEVICEIP/manager?action=execcmd&command=echo%20%22hello%22%20%3E%20/system/root/test.txt
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This issue has been resolved in firmware version 1.0.3.30.
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* The web interface allows unprivileged users to escalate privileges by
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modifying a cookie on the client side:
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javascript:void(document.cookie="type=admin")
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Full details are available here:
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http://davidjorm.blogspot.com/2015/07/101-ways-to-pwn-phone.html
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MITRE was contacted repeatedly requesting CVE names for these issues, but
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never replied.
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David |