Vulnerability in StackGuard before 1.21 allows remote attackers to bypass the Random and Terminator Canary security mechanisms by using a non-linear attack which directly modifies a pointer to a return address instead of using a buffer overflow to reach the return address entry itself.

BID:786 | URL:http://www.securityfocus.com/bid/786 | BUGTRAQ:19911109 ImmuniX OS Security Alert: StackGuard 1.21 Released | URL:http://marc.info/?l=bugtraq&m=94218618329838&w=2 | XF:immunix-stackguard-bo(3524) | URL:https://exchange.xforce.ibmcloud.com/vulnerabilities/3524