SCO Unixware i2odialogd Remote Buffer Overflow Vulnerability
BID:876
Info
SCO Unixware i2odialogd Remote Buffer Overflow Vulnerability
| Bugtraq ID: | 876 |
| Class: | Boundary Condition Error |
| CVE: | |
| Remote: | Yes |
| Local: | No |
| Published: | Dec 22 1999 12:00AM |
| Updated: | Dec 22 1999 12:00AM |
| Credit: | Vulnerability discovery credited to Brock Tellier <[email protected]>. |
| Vulnerable: |
SCO Unixware 7.1 |
| Not Vulnerable: |
SCO Open Server 5.0.5 |
Discussion
SCO Unixware i2odialogd Remote Buffer Overflow Vulnerability
UnixWare is a variant of the Unix operating system originally written by SCO, and distributed and maintained by Caldera.
i20dialogd is a daemon which provides a front-end for controlling the i20 subsystem. It is shipped with SCO Unixware and installed running as root by default. In its authentication mechanism exists a serious buffer overflow vulnerability. The username/password buffers are of a fixed length (88+ characters) with no bounds checking performed on them. Because of this it is possible to overflow the buffer, corrupt the stack and overwrite the return address altering the flow of execution (and running arbitrary code). It should be noted that exploit code must be encoded (base64) before being sent to the server.
UnixWare is a variant of the Unix operating system originally written by SCO, and distributed and maintained by Caldera.
i20dialogd is a daemon which provides a front-end for controlling the i20 subsystem. It is shipped with SCO Unixware and installed running as root by default. In its authentication mechanism exists a serious buffer overflow vulnerability. The username/password buffers are of a fixed length (88+ characters) with no bounds checking performed on them. Because of this it is possible to overflow the buffer, corrupt the stack and overwrite the return address altering the flow of execution (and running arbitrary code). It should be noted that exploit code must be encoded (base64) before being sent to the server.
Exploit / POC
SCO Unixware i2odialogd Remote Buffer Overflow Vulnerability
Exploit contributed by Brock Tellier <[email protected]>.
Exploit contributed by Brock Tellier <[email protected]>.
Solution / Fix
SCO Unixware i2odialogd Remote Buffer Overflow Vulnerability
Solution:
Fix available:
SCO Unixware 7.1
Solution:
Fix available:
SCO Unixware 7.1
-
Caldera sse054.tar
ftp://stage.caldera.com/pub/security/sse/sse054/sse054.tar
References
SCO Unixware i2odialogd Remote Buffer Overflow Vulnerability
References:
References: