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2 vulnerabilities found for Arm GNU Toolchain by Arm Ltd
CVE-2023-4039 (GCVE-0-2023-4039)
Vulnerability from nvd – Published: 2023-09-13 08:05 – Updated: 2026-06-23 17:19 Disputed
VLAI
Title
GCC's-fstack-protector fails to guard dynamically-sized local variables on AArch64
Summary
**DISPUTED**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. NOTE: The GCC project argues that this is a missed hardening bug and not a vulnerability by itself.
Severity
4.8 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-693 - Protection Mechanism Failure
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Arm Ltd | Arm GNU Toolchain |
Affected:
All versions where option -fstack-protector is used
|
|
| GNU | GCC |
Affected:
All versions of GCC that target AArch64 when option -fstack-protector is used
|
Date Public
2023-09-12 09:00
Credits
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CVE-2023-4039 (GCVE-0-2023-4039)
Vulnerability from cvelistv5 – Published: 2023-09-13 08:05 – Updated: 2026-06-23 17:19 Disputed
VLAI
Title
GCC's-fstack-protector fails to guard dynamically-sized local variables on AArch64
Summary
**DISPUTED**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
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alloca(). The stack-protector operates as intended for statically-sized
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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. NOTE: The GCC project argues that this is a missed hardening bug and not a vulnerability by itself.
Severity
4.8 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-693 - Protection Mechanism Failure
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Arm Ltd | Arm GNU Toolchain |
Affected:
All versions where option -fstack-protector is used
|
|
| GNU | GCC |
Affected:
All versions of GCC that target AArch64 when option -fstack-protector is used
|
Date Public
2023-09-12 09:00
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