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Vulnerabilities/CVE-2023-4911Public Intelligence Dossier
Source: netapp · Limited verification•Last verified: •Collection Degraded
CVE-2023-4911ListedHIGH (raw)CVSS 7.8CWE-122

A buffer overflow was discovered in the GNU C Library's dynamic loader ld.so while processing the GLIBC_TUNABLES environment variable

Published: 03 Oct 2023•Last updated: 15 Oct 2026, 03:47 AM IST•Source identifier: secalert@redhat.com
Dossier completeness: source-provided sections 3 / 3 · rule guidance available. Missing source facts count as incomplete.
Official source
CISA KEV catalog
Listed
Added21 Nov 2023
Due12 Dec 2023
RansomwareUnknown
CVSS score
7.8HIGH (raw)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Metric sourcesecalert@redhat.com
EPSS probability
63.8%0.638
Percentile99th
Weakness type
CWE-122
CWE-787
Remediation
Patch status unknown
No fixed version or KB recorded

Why It Matters

Analysis dossier

Why It Matters

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.

SOC priority

Immediate Attention

Actively exploited

Yes

Publicly disclosed

Unknown

Risk basis: CISA KEV exploitation signal; SOC ecosystem technology relevance; HIGH severity; Known exploitation signal from CISA KEV or ransomware metadata

Affected Products & Remediation

37 source-backed products
Affected products and versions (source)
  • netapp bootstrap os · version range not provided by source · NVD CPE · Source
  • siemens simatic s7-1500 cpu 1518-4 pn\/dp mfp firmware · >= 3.1.5 · NVD CPE · Source
  • siemens simatic s7-1500 cpu 1518f-4 pn\/dp mfp firmware · >= 3.1.5 · NVD CPE · Source
  • siemens siplus s7-1500 cpu 1518-4 pn\/dp mfp firmware · >= 3.1.5 · NVD CPE · Source
  • siemens simatic s7-1500 tm mfp firmware · < 1.1 · NVD CPE · Source
  • gnu glibc · >= 2.34 < 2.39 · NVD CPE · Source
  • fedoraproject fedora · 37; 38; 39 · NVD CPE · Source
  • redhat codeready linux builder · 9.0; eus 8.6; eus 9.2; eus 9.4; eus 9.6; for arm64 9.0 aarch64; for arm64 eus 8.6; for arm64 eus 9.2 aarch64; for arm64 eus 9.4 aarch64; for arm64 eus 9.6 aarch64; for ibm z systems 9.0 s390x; for ibm z systems eus 8.6; for ibm z systems eus 9.2 s390x; for ibm z systems eus 9.4 s390x; for ibm z systems eus 9.6 s390x; for power little endian 9.0 ppc64le; for power little endian eus 8.6; for power little endian eus 9.2 ppc64le; for power little endian eus 9.4 ppc64le; for power little endian eus 9.6 ppc64le · NVD CPE · Source
  • redhat codeready linux builder eus · 8.6; 9.2; 9.4; 9.6 · NVD CPE · Source
  • redhat codeready linux builder for arm64 · 9.0 aarch64; eus 8.6; eus 9.2 aarch64; eus 9.4 aarch64; eus 9.6 aarch64 · NVD CPE · Source
  • redhat codeready linux builder for arm64 eus · 8.6; 9.2 aarch64; 9.4 aarch64; 9.6 aarch64 · NVD CPE · Source
  • redhat codeready linux builder for ibm z systems · 9.0 s390x; eus 8.6; eus 9.2 s390x; eus 9.4 s390x; eus 9.6 s390x · NVD CPE · Source
  • redhat codeready linux builder for ibm z systems eus · 8.6; 9.2 s390x; 9.4 s390x; 9.6 s390x · NVD CPE · Source
  • redhat codeready linux builder for power little endian · 9.0 ppc64le; eus 8.6; eus 9.2 ppc64le; eus 9.4 ppc64le; eus 9.6 ppc64le · NVD CPE · Source
  • redhat codeready linux builder for power little endian eus · 8.6; 9.2 ppc64le; 9.4 ppc64le; 9.6 ppc64le · NVD CPE · Source
  • redhat virtualization · 4.0; host 4.0 · NVD CPE · Source
  • redhat virtualization host · 4.0 · NVD CPE · Source
  • redhat enterprise linux · 8.0; 9.0; eus 8.6; eus 9.2; eus 9.4; eus 9.6; for arm 64 9.0 aarch64; for arm 64 eus 8.6 aarch64; for arm 64 eus 9.2 aarch64; for arm 64 eus 9.4 aarch64 · NVD CPE · Source
  • redhat enterprise linux eus · 8.6; 9.2; 9.4; 9.6 · NVD CPE · Source
  • redhat enterprise linux for arm 64 · 9.0 aarch64; eus 8.6 aarch64; eus 9.2 aarch64; eus 9.4 aarch64 · NVD CPE · Source
  • redhat enterprise linux for arm 64 eus · 8.6 aarch64; 9.2 aarch64; 9.4 aarch64 · NVD CPE · Source
  • redhat enterprise linux for ibm z systems · version range not provided by source · NVD CPE · Source
  • redhat enterprise linux for ibm z systems eus · version range not provided by source · NVD CPE · Source
  • redhat enterprise linux for ibm z systems eus s390x · version range not provided by source · NVD CPE · Source
  • redhat enterprise linux for power big endian eus · version range not provided by source · NVD CPE · Source
  • redhat enterprise linux for power little endian · version range not provided by source · NVD CPE · Source
  • redhat enterprise linux for power little endian eus · version range not provided by source · NVD CPE · Source
  • redhat enterprise linux server aus · version range not provided by source · NVD CPE · Source
  • redhat enterprise linux server for power little endian update services for sap solutions · version range not provided by source · NVD CPE · Source
  • redhat enterprise linux server tus · version range not provided by source · NVD CPE · Source
  • redhat enterprise linux update services for sap solutions · version range not provided by source · NVD CPE · Source
  • canonical ubuntu linux · version range not provided by source · NVD CPE · Source
  • debian debian linux · version range not provided by source · NVD CPE · Source
  • netapp h410c firmware · version range not provided by source · NVD CPE · Source
  • netapp h300s firmware · version range not provided by source · NVD CPE · Source
  • netapp h500s firmware · version range not provided by source · NVD CPE · Source
  • netapp h700s firmware · version range not provided by source · NVD CPE · Source
NVD applicability prerequisites: cpe:2.3:h:netapp:hci_compute_node:-:*:*:*:*:*:*:*, cpe:2.3:h:siemens:simatic_s7-1500_cpu_1518-4_pn\/dp_mfp:-:*:*:*:*:*:*:*, cpe:2.3:h:siemens:simatic_s7-1500_cpu_1518f-4_pn\/dp_mfp:-:*:*:*:*:*:*:*, cpe:2.3:h:siemens:siplus_s7-1500_cpu_1518-4_pn\/dp_mfp:-:*:*:*:*:*:*:*, cpe:2.3:h:siemens:simatic_s7-1500_tm_mfp:-:*:*:*:*:*:*:*, cpe:2.3:h:netapp:h410c:-:*:*:*:*:*:*:*, cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:*, cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:*, cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:*, cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:*. These are conditions, not proof that an environment is exposed or unaffected.
Recorded patch / KBNot provided by source

Vendor or catalog guidance (source)

  • CISA KEV: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Known exploitation (source facts)

Only what a source states. Unknown means no source has said either way; it is not "not exploited".

CISA KEV
Listed
Exploited (source statement)
Yes
Publicly disclosed (source)
Unknown

CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Suggested hunting (rule-based inference)

SecOps Signal recommendation (rule-based inference). These steps are hunting hypotheses from the vulnerability class; they do not state or imply that exploitation occurred here or anywhere.

Matched local-privilege-escalation (CVSS AV:L, CVSS PR:L)

Exposure

  1. Identify hosts reporting this CVE, prioritising shared or multi-user systems.Telemetry: DeviceTvmSoftwareVulnerabilities · A local, low-privilege vector matters most where untrusted users can run code. · Rule local-privilege-escalation

Exploitation evidence

  1. Look for low-privileged processes spawning SYSTEM or root-level child processes on affected hosts.Telemetry: DeviceProcessEvents · Hunting hypothesis from the CVSS vector; privilege transitions are a focused starting point, not evidence of attack. · Rule local-privilege-escalation

Response

  1. Confirm the source-stated update on affected hosts.Telemetry: DeviceTvmSoftwareVulnerabilities · Host inventory can verify remediation. · Rule local-privilege-escalation

CISA KEV Record

Catalog entry
21 Nov 2023
Required action due
12 Dec 2023
Known ransomware use
Unknown

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Change History & Source Data

— No recorded material change

CNA / source
secalert@redhat.com
Record status · verification
UPDATED · CISA KEV confirmed
CPE
cpe:2.3:o:netapp:bootstrap_os:-:*:*:*:*:*:*:*, cpe:2.3:h:netapp:hci_compute_node:-:*:*:*:*:*:*:*, cpe:2.3:o:siemens:simatic_s7-1500_cpu_1518-4_pn\/dp_mfp_firmware:*:*:*:*:*:*:*:*, cpe:2.3:h:siemens:simatic_s7-1500_cpu_1518-4_pn\/dp_mfp:-:*:*:*:*:*:*:*, cpe:2.3:o:siemens:simatic_s7-1500_cpu_1518f-4_pn\/dp_mfp_firmware:*:*:*:*:*:*:*:*, cpe:2.3:h:siemens:simatic_s7-1500_cpu_1518f-4_pn\/dp_mfp:-:*:*:*:*:*:*:*, cpe:2.3:o:siemens:siplus_s7-1500_cpu_1518-4_pn\/dp_mfp_firmware:*:*:*:*:*:*:*:*, cpe:2.3:h:siemens:siplus_s7-1500_cpu_1518-4_pn\/dp_mfp:-:*:*:*:*:*:*:*, cpe:2.3:o:siemens:simatic_s7-1500_tm_mfp_firmware:*:*:*:*:*:*:*:*, cpe:2.3:h:siemens:simatic_s7-1500_tm_mfp:-:*:*:*:*:*:*:*

Evidence & Provenance

4 public sources
CISA KEV CatalogAdded 2023-11-21bugzilla.redhat.comSource recordnvd.nist.govSource recordaccess.redhat.comSource record

Linked by the query's stored exact CVE association. Review required tables and validation status before use.

Detection Hunting Query
Target: DeviceTvmSoftwareVulnerabilities•Defender XDR
Detect endpoints exposed to CVE-2023-4911
Purpose: Exposure assessment (Category: Exposure Check)Why linked: Query metadata names CVE-2023-4911
DeviceTvmSoftwareVulnerabilities| where CveId == "CVE-2023-4911"| project DeviceId, DeviceName, OSPlatform, OSVersion, SoftwareVendor, SoftwareName, SoftwareVersion, CveId, VulnerabilitySeverityLevel, RecommendedSecurityUpdate, RecommendedSecurityUpdateId| sort by VulnerabilitySeverityLevel desc
Schema Checked · Not runtime validatedSource: SecOps Signal deterministic template · Limited verificationStatic screening: Passed structure and schema checks; tenant execution is not verified.
Open KQL Library

Correlated briefings

— No published briefing references this CVE

SecOps Signal surfaces public advisory facts only. A missing value means the source has not published it, not that your environment is unaffected. No tenant inventory is connected.