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This patch, extracted from upstreams sudo-1.8.3p2.patch.gz addresses the
recent Sudo format string vulnerability CVE 2012-0809.
http://www.sudo.ws/sudo/alerts/sudo_debug.html
Signed-off-by: Joshua Lock <josh@linux.intel.com>
Upstream-Status: Backport
diff -urNa sudo-1.8.3p1/src/sudo.c sudo-1.8.3p2/src/sudo.c
--- sudo-1.8.3p1/src/sudo.c Fri Oct 21 09:01:26 2011
+++ sudo-1.8.3p2/src/sudo.c Tue Jan 24 15:59:03 2012
@@ -1208,15 +1208,15 @@
sudo_debug(int level, const char *fmt, ...)
{
va_list ap;
- char *fmt2;
+ char *buf;
if (level > debug_level)
return;
- /* Backet fmt with program name and a newline to make it a single write */
- easprintf(&fmt2, "%s: %s\n", getprogname(), fmt);
+ /* Bracket fmt with program name and a newline to make it a single write */
va_start(ap, fmt);
- vfprintf(stderr, fmt2, ap);
+ evasprintf(&buf, fmt, ap);
va_end(ap);
- efree(fmt2);
+ fprintf(stderr, "%s: %s\n", getprogname(), buf);
+ efree(buf);
}
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