CVE intelligence and bounded remediation

CVE-2023-4911 — GNU C Library Buffer Overflow Vulnerability

High CVSS 7.8 CISA KEV

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.

Severity
High
CVSS
7.8 (3.1)
Published
2023-10-03
CISA KEV
Known exploited
Ecosystem
software/application
Weaknesses
CWE-122, CWE-787

Affected products

  • netapp / bootstrap_os
  • siemens / simatic_s7-1500_cpu_1518-4_pn/dp_mfp_firmware
  • siemens / simatic_s7-1500_cpu_1518f-4_pn/dp_mfp_firmware
  • siemens / siplus_s7-1500_cpu_1518-4_pn/dp_mfp_firmware
  • siemens / simatic_s7-1500_tm_mfp_firmware
  • gnu / glibc

Showing 6 representative product identities from 73 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Buffer bounds, memory safety, and memory corruption

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Check exposure

  • Identify affected native-code versions, build flags, architectures, parsers, codecs, drivers, and input paths in all shipped artifacts.
  • Determine whether untrusted data reaches the affected routine and the process privilege, sandbox, and network exposure.
  • Confirm statically linked, vendored, firmware, and platform-provided copies, not only package-manager records.

Remediate safely

  • Apply the maintained upstream correction or replace the affected component, then rebuild every dependent artifact from clean inputs.
  • Adopt bounds-checked interfaces, validated sizes and integer conversions, clear ownership, and memory-safe components where practical.
  • Enable supported compiler and runtime hardening and add sanitized tests and fuzz regression seeds derived from non-weaponized fixtures.

Authoritative sources

Complete CVE record and remediation plan

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