CVE-2011-4623 Vulnerability Analysis & Exploit Details

CVE-2011-4623
Vulnerability Scoring

2.1
/10
Low Severity

Due to its limited impact, CVE-2011-4623 is considered a low-severity vulnerability.

Attack Complexity Details

  • Attack Complexity: Low
    Exploits can be performed without significant complexity.
  • Attack Vector: Local
    Local access is required to exploit this vulnerability.
  • Privileges Required: None
    No authentication is required for exploitation.
  • Scope:
    Impact is confined to the initially vulnerable component.
  • User Interaction: None
    No user interaction is necessary for exploitation.

CVE-2011-4623 Details

Status: Deferred

Last updated: 🕧 11 Apr 2025, 00:51 UTC
Originally published on: 🕦 25 Sep 2012, 23:55 UTC

Time between publication and last update: 4580 days

CVSS Release: version 2

CVE-2011-4623 Vulnerability Summary

CVE-2011-4623: Integer overflow in the rsCStrExtendBuf function in runtime/stringbuf.c in the imfile module in rsyslog 4.x before 4.6.6, 5.x before 5.7.4, and 6.x before 6.1.4 allows local users to cause a denial of service (daemon hang) via a large file, which triggers a heap-based buffer overflow.

Assessing the Risk of CVE-2011-4623

Access Complexity Graph

The exploitability of CVE-2011-4623 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).

Exploitability Analysis for CVE-2011-4623

The vulnerability CVE-2011-4623 is highly exploitable since it requires low complexity and no authentication.

Understanding AC and PR

A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.

Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.

Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2011-4623, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.

CIA Impact Analysis

Below is the Impact Analysis for CVE-2011-4623, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: None
    CVE-2011-4623 does not compromise confidentiality.
  • Integrity: None
    CVE-2011-4623 does not impact data integrity.
  • Availability: None
    CVE-2011-4623 does not affect system availability.

Exploit Prediction Scoring System (EPSS)

The EPSS score estimates the probability that this vulnerability will be exploited in the near future.

EPSS Score: 0.042% (probability of exploit)

EPSS Percentile: 5.07% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 94.93% of others.

CVE-2011-4623 References

External References

CWE Common Weakness Enumeration

CWE-189

Vulnerable Configurations

  • cpe:2.3:a:rsyslog:rsyslog:4.1.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:4.1.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:4.1.1:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:4.1.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:4.1.2:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:4.1.2:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:4.1.3:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:4.1.3:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:4.1.4:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:4.1.4:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:4.1.5:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:4.1.5:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:4.1.6:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:4.1.6:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:4.1.7:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:4.1.7:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:4.2.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:4.2.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:4.3.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:4.3.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:4.3.1:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:4.3.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:4.3.2:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:4.3.2:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:4.4.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:4.4.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:4.4.1:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:4.4.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:4.4.2:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:4.4.2:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:4.5.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:4.5.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:4.5.1:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:4.5.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:4.5.2:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:4.5.2:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:4.5.3:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:4.5.3:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:4.5.4:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:4.5.4:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:4.5.5:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:4.5.5:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:4.5.6:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:4.5.6:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:4.5.7:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:4.5.7:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:4.5.8:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:4.5.8:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:4.6.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:4.6.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:4.6.1:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:4.6.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:4.6.2:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:4.6.2:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:4.6.3:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:4.6.3:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:4.6.4:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:4.6.4:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:4.6.5:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:4.6.5:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.1.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.1.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.1.1:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.1.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.1.2:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.1.2:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.1.3:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.1.3:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.1.4:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.1.4:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.1.5:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.1.5:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.1.6:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.1.6:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.2.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.2.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.2.1:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.2.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.2.2:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.2.2:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.3.1:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.3.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.3.2:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.3.2:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.3.3:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.3.3:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.3.4:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.3.4:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.3.5:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.3.5:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.3.6:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.3.6:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.3.7:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.3.7:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.4.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.4.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.4.1:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.4.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.4.2:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.4.2:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.5.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.5.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.5.1:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.5.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.5.2:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.5.2:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.5.3:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.5.3:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.5.4:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.5.4:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.5.5:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.5.5:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.5.6:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.5.6:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.5.7:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.5.7:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.6.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.6.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.6.1:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.6.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.6.2:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.6.2:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.6.3:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.6.3:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.6.4:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.6.4:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.6.5:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.6.5:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.7.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.7.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.7.1:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.7.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.7.2:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.7.2:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:5.7.3:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:5.7.3:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:6.1.0:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:6.1.0:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:6.1.1:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:6.1.1:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:6.1.2:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:6.1.2:*:*:*:*:*:*:*
  • cpe:2.3:a:rsyslog:rsyslog:6.1.3:*:*:*:*:*:*:*
    cpe:2.3:a:rsyslog:rsyslog:6.1.3:*:*:*:*:*:*:*

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