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library/addisco.c has several comparison like the check in this function:
static unsigned short
get_16 (unsigned char **p,
unsigned char *end)
{
unsigned short val;
if ((*p) + 2 > end)
return 0;
val = ns_get16 (*p);
(*p) += 2;
return val;
}
The problem is that a pointer that points after the element after the last element in the buffer is invalid. Depending on how this function is call, a smart compiler could optimize away such checks.
The comparison should be written like this:
if (end - (*p) < 2)
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://rhn.redhat.com/errata/RHBA-2016-2428.html
library/addisco.c has several comparison like the check in this function: static unsigned short get_16 (unsigned char **p, unsigned char *end) { unsigned short val; if ((*p) + 2 > end) return 0; val = ns_get16 (*p); (*p) += 2; return val; } The problem is that a pointer that points after the element after the last element in the buffer is invalid. Depending on how this function is call, a smart compiler could optimize away such checks. The comparison should be written like this: if (end - (*p) < 2)