A vulnerability has been found in Immunix StackGuard 1.21 (Operating System) and classified as critical. This vulnerability affects an unknown part of the component Canary Security Mechanism. The manipulation with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was disclosed 11/09/1999 (Website). The advisory is available at marc.theaimsgroup.com. This vulnerability was named CVE-1999-1111. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available.

Upgrading to version 1.2.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at X-Force (3524).

Productinfo

Type

• Operating System

Vendor

• Immunix

Name

• StackGuard

Version

• 1.21

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CPE 2.2info

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