CVE-2023-4039
Vulnerability from cvelistv5
Published
2023-09-13 08:05
Modified
2024-08-02 07:17
Severity ?
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
arm-security@arm.comhttps://developer.arm.com/Arm%20Security%20Center/GCC%20Stack%20Protector%20Vulnerability%20AArch64Exploit, Patch, Third Party Advisory
arm-security@arm.comhttps://github.com/metaredteam/external-disclosures/security/advisories/GHSA-x7ch-h5rf-w2mfExploit, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://developer.arm.com/Arm%20Security%20Center/GCC%20Stack%20Protector%20Vulnerability%20AArch64Exploit, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/metaredteam/external-disclosures/security/advisories/GHSA-x7ch-h5rf-w2mfExploit, Patch, Third Party Advisory
Impacted products
Vendor Product Version
GNU GCC Version: All versions of GCC that target AArch64 when option -fstack-protector is used
Show details on NVD website

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