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- Snyk ID SNYK-DEBIAN11-GCC9-5901306
- published 14 Sep 2023
- disclosed 13 Sep 2023
Introduced: 13 Sep 2023CVE-2023-4039 Open this link in a new tab
How to fix?
There is no fixed version for
Note: Versions mentioned in the description apply only to the upstream
gcc-9 package and not the
gcc-9 package as distributed by
How to fix? for
Debian:11 relevant fixed versions and status.
A failure in the -fstack-protector feature in GCC-based toolchains that target AArch64 allows an attacker to exploit an existing buffer overflow in dynamically-sized local variables in your application without this being detected. This stack-protector failure only applies to C99-style dynamically-sized local variables or those created using alloca(). The stack-protector operates as intended for statically-sized local variables.
The default behavior when the stack-protector detects an overflow is to terminate your application, resulting in controlled loss of availability. An attacker who can exploit a buffer overflow without triggering the stack-protector might be able to change program flow control to cause an uncontrolled loss of availability or to go further and affect confidentiality or integrity.