[UNIX] Multiple Vulnerabilities in Solaris in.rarpd

From: support@securiteam.com
Date: 05/23/02 

From: support@securiteam.com
To: list@securiteam.com
Date: Thu, 23 May 2002 08:48:19 +0200 (CEST)

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  Multiple Vulnerabilities in Solaris in.rarpd
------------------------------------------------------------------------

SUMMARY

Rarpd is a reverse ARP protocol for small to medium sized networks. In the
Solaris implementation (in.rarpd) there seems to be 3 remotely exploitable
buffer overflows, 2 locally exploitable and 2 cases of format string
exploitability.

DETAILS

Vulnerable code:
In the functions error and syserr there contains 2 common syslog calls
without format strings.

static void
syserr(s)
char *s;
{
        char buf[256];

        (void) sprintf(buf, "%s: %s", s, strerror(errno));
        (void) fprintf(stderr, "%s: %s\n", cmdname, buf);
        syslog(LOG_ERR, buf);
        exit(1);
}

/* VARARGS1 */
static void
error(char *fmt, ...)
{
        char buf[256];
        va_list ap;

        va_start(ap, fmt);
        (void) vsprintf(buf, fmt, ap);
        va_end(ap);
        (void) fprintf(stderr, "%s: %s\n", cmdname, buf);
        syslog(LOG_ERR, buf);
        exit(1);
}

There are two vulnerable calls that could be exploited locally or
remotely.

Vendor status:
Vendor has not been contacted yet.

ADDITIONAL INFORMATION

The information has been provided by <mailto:davidreign@hotmail.com>
david evlis reign.

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