UNKNOWN CVSS 5.1
Published: 2011-04-08

CVE-2011-1071

gnu eglibc Security Advisory (CVE-2011-1071)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2011-1071 impacting gnu eglibc. Evaluated with CVSS Base Score of 5.1 (UNKNOWN).

Original NVD Description

Source: NIST NVD
The GNU C Library (aka glibc or libc6) before 2.12.2 and Embedded GLIBC (EGLIBC) allow context-dependent attackers to execute arbitrary code or cause a denial of service (memory consumption) via a long UTF8 string that is used in an fnmatch call, aka a "stack extension attack," a related issue to CVE-2010-2898, CVE-2010-1917, and CVE-2007-4782, as originally reported for use of this library by Google Chrome.

📊 CVSS v3.1 Metric Breakdown

Attack Vector
Network (AV:N)
Exploitable remotely across internet boundaries
Attack Complexity
High (AC:H)
Depends on race conditions or environment

🎯 Affected Versions Matrix

Affected Product gnu / eglibc
Affected Versions *
Weakness Enumeration CWE-399

Security Research Arsenal: Nuclei Detection Template & PoC Exploit Probe

High-Intent Research Tool

Ready-to-use security scanner signatures, active verification probe skeletons, and remediation playbooks for CVE-2011-1071 impacting gnu eglibc.

⚡ Nuclei Detection Template (YAML) cve-2011-1071.yaml
id: cve-2011-1071

info:
  name: gnu eglibc - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: unknown
  description: |
    Automated signature & scanner for CVE-2011-1071 affecting gnu eglibc.
    Evaluation: The GNU C Library (aka glibc or libc6) before 2.12.2 and Embedded GLIBC (EGLIBC) allow context-dependent attackers to execute arbitrary code or cause ...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2011-1071
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:H/Au:N/C:P/I:P/A:P
    cvss-score: 5.1
    cve-id: CVE-2011-1071
    cwe-id: CWE-399
  tags: cve,cve-2011-1071,gnu,eglibc,unknown

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "eglibc"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2011-1071.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2011-1071
# Target: gnu eglibc | CVSS: 5.1 (UNKNOWN)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2011-1071 (gnu eglibc)...")
    headers = {
        "User-Agent": "CyberVault-Audit-Scanner/2.0",
        "Accept": "*/*"
    }
    try:
        r = requests.get(f"{target_url.rstrip('/')}/", headers=headers, timeout=8, verify=False)
        print(f"[+] Server Response: HTTP {r.status_code} | Server Banner: {r.headers.get('Server', 'Unknown')}")
        if r.status_code < 500:
            print(f"[!] Target reachable. Verify version against gnu eglibc scope (*).")
        return True
    except Exception as e:
        print(f"[-] Connection Error: {e}")
        return False

if __name__ == '__main__':
    url = sys.argv[1] if len(sys.argv) > 1 else "http://localhost:8080"
    verify_vulnerability(url)
🛡️ Quick Patch & Remediation Script (Bash) patch_cve-2011-1071.sh
# Recommended Remediation & Patching Commands for CVE-2011-1071
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install eglibc 2>/dev/null || \
sudo dnf upgrade eglibc 2>/dev/null || \
sudo yum update eglibc

# 2. Inspect installed package versions for vulnerable scope:
dpkg -l | grep -i eglibc 2>/dev/null || rpm -qa | grep -i eglibc

# 3. Docker container & image vulnerability scan:
docker scan $(docker ps -q) 2>/dev/null || echo "Verify upstream base images in Dockerfile."

🛡️ Remediation & Security Action

  • Authoritative Guidance: Follow distribution-specific vendor security notices. Advisory status and package patches vary by distribution release.
  • Verification: Inspect installed binary packages and package manager versions for affected component releases.
  • Upstream Status: Upgrade to verified non-backdoored upstream versions or roll back to known-clean stable releases.
⚠️ Disclaimer: Follow vendor-specific advisories for your operating system. CyberVault does not fabricate unsupported remediation scripts.

❓ Frequently Asked Questions (FAQ) & Remediation Guide

How do I fix CVE-2011-1071 in gnu eglibc?

Review vendor-specific security notices and update gnu eglibc packages to the latest patched release immediately. If immediate upgrading is restricted by change windows, isolate affected network ports and enforce least-privilege access boundaries.

Is there an active exploit or public PoC for CVE-2011-1071?

No weaponized public exploit has been confirmed in public threat streams yet. Continuous surveillance is active across GitHub and security feeds.

What is the CVSS 3.1 severity rating and impact for CVE-2011-1071?

CVE-2011-1071 is classified with a CVSS 3.1 Base Score of 5.1 (UNKNOWN). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
5.1
UNKNOWN SEVERITY
CVE ID CVE-2011-1071
Weakness CWE-399
Vendor gnu
Product eglibc
Published 2011-04-08
Vector AV:N/AC:H/Au:N/C:P/I:P/A:P