CVE-2023-4911 — Glibc: buffer overflow in ld.so leading to privilege escalation

Affected: glibc, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8.6 Extended Update Support, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 9.0 Extended Update Support, Red Hat Virtualization 4 for Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP and 1 more

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.

USN-6409-1 — glibc vulnerabilities

Affected: Ubuntu:22.04:LTS: glibc

It was discovered that the GNU C Library incorrectly handled the GLIBC_TUNABLES environment variable. An attacker could possibly use this issue to perform a privilege escalation attack. (CVE-2023-4911)

It was discovered that the GNU C Library incorrectly handled certain DNS responses when the system was configured in no-aaaa mode. A remote attacker could possibly use this issue to cause the GNU C Library to crash, resulting in a denial of service. This issue only affected Ubuntu 23.04. (CVE-2023-4527)

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CVE-2023-4911 — Glibc: buffer overflow in ld.so leading to privilege escalation

USN-6409-1 — glibc vulnerabilities