All the vulnerabilites related to Arm Ltd - Arm GNU Toolchain
cve-2023-4039
Vulnerability from cvelistv5
Published
2023-09-13 08:05
Modified
2024-08-02 07:17
Summary
GCC's-fstack-protector fails to guard dynamically-sized local variables on AArch64
Impacted products
Arm LtdArm GNU Toolchain
GNUGCC
Show details on NVD website


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              "value": "\u003cp\u003e\n\u003c/p\u003e\u003cp\u003e**DISPUTED** A failure in the -fstack-protector feature in GCC-based toolchains \nthat target AArch64 allows an attacker to exploit an existing buffer \noverflow in dynamically-sized local variables in your application \nwithout this being detected. This stack-protector failure only applies \nto C99-style dynamically-sized local variables or those created using \nalloca(). The stack-protector operates as intended for statically-sized \nlocal variables.\u003c/p\u003e\u003cp\u003eThe default behavior when the stack-protector \ndetects an overflow is to terminate your application, resulting in \ncontrolled loss of availability. An attacker who can exploit a buffer \noverflow without triggering the stack-protector might be able to change \nprogram flow control to cause an uncontrolled loss of availability or to\n go further and affect confidentiality or integrity. NOTE: The GCC project argues that this is a missed hardening bug and not a vulnerability by itself.\u003c/p\u003e\n\n\u003cp\u003e\u003c/p\u003e"
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