CVE-2023-4039 Affecting libgcc package, versions <0:8.5.0-18.0.5.el8
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Test your applications- Snyk ID SNYK-ORACLE8-LIBGCC-5893126
- published 13 Sep 2023
- disclosed 13 Sep 2023
Introduced: 13 Sep 2023
CVE-2023-4039 Open this link in a new tabHow to fix?
Upgrade Oracle:8
libgcc
to version 0:8.5.0-18.0.5.el8 or higher.
This issue was patched in ELSA-2023-12788
.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libgcc
package and not the libgcc
package as distributed by Oracle
.
See How to fix?
for Oracle:8
relevant fixed versions and status.
DISPUTEDA 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
- https://linux.oracle.com/cve/CVE-2023-4039.html
- https://linux.oracle.com/errata/ELSA-2023-12788.html
- https://linux.oracle.com/errata/ELSA-2023-28765.html
- https://linux.oracle.com/errata/ELSA-2023-28766.html
- https://developer.arm.com/Arm%20Security%20Center/GCC%20Stack%20Protector%20Vulnerability%20AArch64
- https://github.com/metaredteam/external-disclosures/security/advisories/GHSA-x7ch-h5rf-w2mf