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H-Sphere Webshell Remote Buffer Overrun Vulnerability
A vulnerability has been discovered in H-Sphere Webshell. During the pre-authentication phase Webshell fails to perform sufficient bounds checking on user-supplied HTTP parameters. As a result, a malicious attacker may be able to trigger a buffer overrun. Successful exploitation of this issue would allow an attacker to overwrite the vulnerable function's instruction pointer. By causing the program to return to attacker-supplied instructions, it may be possible to execute arbitrary code with the privileges of the target process. It should be noted that this issue was discovered in H-Sphere 2.3 RC3. It is not yet known whether earlier versions are also vulnerable. |
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