fkie_nvd - fkie_cve-2023-4039

FKIE_CVE-2023-4039

Vulnerability from fkie_nvd - Published: 2023-09-13 09:15 - Updated: 2025-02-13 17:17

Severity ?

4.8 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
4.8 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

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.

References

URL	Tags
arm-security@arm.com	https://developer.arm.com/Arm%20Security%20Center/GCC%20Stack%20Protector%20Vulnerability%20AArch64	Exploit, Patch, Third Party Advisory
arm-security@arm.com	https://github.com/metaredteam/external-disclosures/security/advisories/GHSA-x7ch-h5rf-w2mf	Exploit, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://developer.arm.com/Arm%20Security%20Center/GCC%20Stack%20Protector%20Vulnerability%20AArch64	Exploit, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://github.com/metaredteam/external-disclosures/security/advisories/GHSA-x7ch-h5rf-w2mf	Exploit, Patch, Third Party Advisory

Impacted products

	Vendor	Product	Version
	gnu	gcc	*

JSON

To clipboard

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      "value": "**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.\n\nThe 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."
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      "value": "Una falla en la funci\u00f3n -fstack-protector en cadenas de herramientas basadas en GCC que apuntan a AArch64 permite a un atacante explotar un Desbordamiento de B\u00fafer existente en variables locales de tama\u00f1o din\u00e1mico en su aplicaci\u00f3n sin que esto sea detectado. Esta falla del protector de pila solo se aplica a variables locales de tama\u00f1o din\u00e1mico estilo C99 o aquellas creadas usando alloca(). El protector de pila funciona seg\u00fan lo previsto para variables locales de tama\u00f1o est\u00e1tico. El comportamiento predeterminado cuando el protector de pila detecta un desbordamiento es finalizar su aplicaci\u00f3n, lo que resulta en una p\u00e9rdida controlada de disponibilidad. Un atacante que pueda aprovechar un Desbordamiento del B\u00fafer sin activar el protector de pila podr\u00eda cambiar el control de flujo del programa para provocar una p\u00e9rdida incontrolada de disponibilidad o ir m\u00e1s all\u00e1 y afectar la confidencialidad o la integridad."
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  "lastModified": "2025-02-13T17:17:14.717",
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        "impactScore": 2.5,
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}

CVE-2023-4039 (GCVE-0-2023-4039)

Vulnerability from cvelistv5 – Published: 2023-09-13 08:05 – Updated: 2025-02-13 17:07

Summary

Severity ?

4.8 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

CWE

CWE-693 - Protection Mechanism Failure

Assigner

Arm

References

URL

Tags

	https://developer.arm.com/Arm%20Security%20Center…
	https://github.com/metaredteam/external-disclosur…

Impacted 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

Credits

Tom Hebb from Meta Red Team X and Maria Markstedter from Azeria Labs

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2023-4039

CVE-2023-4039 (GCVE-0-2023-4039)

Tags

Sightings

Nomenclature