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CVE-2023-4911

Glibc: buffer overflow in ld.so leading to privilege escalation

Exploited in the wild. In CISA KEV since 2023‑11‑21. Fixed versions are out.

CVSS 3.17.8HighEPSS percentile99th64% chance in 30 daysCISA KEVListedsince 2023-11-21, due 2023-12-12
Public exploit: 5 sourcesFix5 products4 fixed builds listed below

Published Updated Sources: CVE.org, NVD, BDU, CSAF

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • Red Hat Enterprise Linux 8Fixed builds0:2.28-225.el8_8.6, 0:2.34-60.el9_2.7Stated by: CVE record
  • Red Hat Enterprise Linux 8.6 Extended Update SupportFixed builds0:2.28-189.6.el8_6Stated by: CVE record
  • Red Hat Enterprise Linux 9.0 Extended Update SupportFixed builds0:2.34-28.el9_0.4Stated by: CVE record
  • Red Hat Virtualization 4 for Red Hat Enterprise Linux 8Fixed builds0:2.28-189.6.el8_6Stated by: CVE record
  • Siemens Simatic S7-1500 Cpu 1518-4 Pn\/dp Mfp FirmwareAffected: 3.1.5Upgrade to: not statedStated by: NVD

Versions as the sources state them. 11 more products have version data. Full version matrix after sign-in

Check it yourselfA free Nuclei and OpenVAS check exists for this CVE. Run it against your hosts.Is your organisation exposed?Discuss checks for your systems with a specialist. Scope is agreed before testing.

Coverage timeline

0 publishers

  1. Added to CISA KEV catalog

    ·CISA KEV

Sourced from public security reporting — each date is when it was published, not when it happened. 1 further article named this CVE in wider roundups without reporting it as a distinct event.

What it is

From the CVE record

Multiple vulnerabilities have been identified in the additional GNU/Linux subsystem of the firmware version V3.1.5 for the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP (incl. SIPLUS variant). Siemens is preparing fix versions and recommends countermeasures for products where fixes are not, or not yet available.

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS99th
Public exploit
CISA KEV
CISA KEV

Listed as exploited in the wild since 2023-11-21.

US federal agencies must remediate by 2023-12-12.

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

5 sources with a proof of concept or module.

Exploit links, PoCs and Metasploit modules after sign-in
EPSS

64% chance of exploitation activity in the next 30 days, which ranks it in the 99th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

A public exploit existed 67 days before the patch.

  1. Patch availableworkaround available, record updated
  2. OpenVAS check added
  3. Patch availableworkaround available, record updated
  4. Public exploit / PoCsource: othernuclei check added
  5. Added to CISA KEV
  6. Publishedweakness classified, att&ck mapped

Affected products

And 34 more affected products. See all after sign-in

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Scored 7.8 by NVD.

How it is reached

  • Attack Vector LocalRequires local access to the vulnerable system (e.g. local login, malicious file)
  • Attack Complexity LowNo special conditions — the attack can be reliably reproduced
  • Privileges Required LowRequires basic user-level privileges
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality HighTotal information disclosure — all data in the component is compromised
  • Integrity HighTotal loss of integrity — attacker can modify any data in the component
  • Availability HighTotal denial of service — the component is completely unavailable

Weaknesses

ATT&CK techniques

Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.

Sources

References in the record

And 285 more references. See all after sign-in

In the news

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