Vulnerability-Lookup

OESA-2023-1735 (CVE-2023-4039)

Vulnerability from osv_openeuler – Published: 2023-10-13 11:06 – Updated: 2026-08-06 11:06 – Source website

Summary

gcc security update

Details

The gcc package contains the GNU Compiler Collection version 10. You'll need this package in order to compile C code.

Security Fix(es):

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.

(CVE-2023-4039)

Severity

4.8 (Medium)


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

References

URL

Type

	https://www.openeuler.org/en/security/safety-bull…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2023-4039	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
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  "details": "The gcc package contains the GNU Compiler Collection version 10. You\u0026apos;ll need this package in order to compile C code.\r\n\r\nSecurity Fix(es):\r\n\r\n\r\n\r\nA 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.\r\n\r\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.\r\n\r\n\r\n\r\n\r\n\r\n(CVE-2023-4039)",
  "id": "OESA-2023-1735",
  "modified": "2026-08-06T11:06:11Z",
  "published": "2023-10-13T11:06:11Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2023-1735"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-4039"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "gcc security update",
  "upstream": [
    "CVE-2023-4039"
  ]
}

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

Vulnerability from cvelistv5 – Published: 2023-09-13 08:05 – Updated: 2026-06-23 17:19 Disputed

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)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-06-03 16:04 UTC

CWE

CWE-693 - Protection Mechanism Failure

Assigner

Arm mitre root

References

2 references

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

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

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	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Action not permitted

OESA-2023-1735 (CVE-2023-4039)

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

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