CVE-2023-4911

CVE Published	2023-10-03
Related CWE(s)	CWE-122: Heap-based Buffer Overflow, CWE-787: Out-of-bounds Write
Related Vendor(s)	fedoraproject, redhat, gnu
Related Product(s)	codeready_linux_builder_for_ibm_z_systems_eus, enterprise_linux_for_ibm_z_systems_eus_s390x, codeready_linux_builder_for_power_little_endian_eus, enterprise_linux_server_aus, enterprise_linux, virtualization, enterprise_linux_for_power_big_endian_eus, codeready_linux_builder_eus, enterprise_linux_eus, fedora, enterprise_linux_for_arm_64_eus, codeready_linux_builder_for_arm64_eus, glibc, virtualization_host, enterprise_linux_server_tus
Exploitation Reported (CISA KEV)	2023-11-21
CVSS 3 Base Score	7.8 (HIGH)
CVSS 3 Attack Complexity	LOW
CVSS 3 Attack Vector	LOCAL

A buffer overflow was discovered in the GNU C Library's dynamic loader ld.so while processing the GLIBC_TUNABLES environment variable. This issue could allow a local attacker to use maliciously crafted GLIBC_TUNABLES environment variables when launching binaries with SUID permission to execute code with elevated privileges.

Cyber Threat Graph Context

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Associated CAPEC Patterns

Forced Integer Overflow (CAPEC-92)

This attack forces an integer variable to go out of range. The integer variable is often used as an offset such as size of memory allocation or similarly. The attacker would typically control the value of such variable and try to get it out of range. For instance the integer in question is incremented past the maximum possible value, it may wrap to become a very small, or negative number, therefore providing a very incorrect value which can lead to unexpected behavior. At worst the attacker can execute arbitrary code.

References

CVE-2023-4911

Cyber Threat Graph Context

Associated CAPEC Patterns

Forced Integer Overflow (CAPEC-92)

References

CVE.org

NIST National Vulnerability Database

CISA Known Exploited Vulnerabilities