TeamHepta/mbedtls
1
0
Fork 0
mirror of https://github.com/Mbed-TLS/mbedtls.git synced 2026-04-10 14:23:42 +02:00
Code Issues Packages Projects Releases Wiki Activity

Disallow leading zeroes when parsing IPv4 addresses

Browse Source 
Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>
This commit is contained in:
Andrzej Kurek
2023-05-01 05:26:47 -04:00
parent 14d6b1124b
commit 6f400a376e
2 changed files with 13 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
library/x509_crt.c
View File

@@ -2667,7 +2667,6 @@ static int x509_inet_pton_ipv6(const char *src, void *dst)
static int x509_inet_pton_ipv4(const char *src, void *dst)
{
/* note: allows leading 0's, e.g. 000.000.000.000 */
const unsigned char *p = (const unsigned char *) src;
uint8_t *res = (uint8_t *) dst;
uint8_t digit, num_digits = 0;
@@ -2681,6 +2680,13 @@ static int x509_inet_pton_ipv4(const char *src, void *dst)
if (digit > 9) {
break;
}
/* Don't allow leading zeroes. These might mean octal format,
* which this implementation does not support. */
if (octet == 0 && num_digits > 0) {
break;
}
octet = octet * 10 + digit;
num_digits++;
p++;