CVE-2020-5202 Vulnerability Analysis & Exploit Details

CVE-2020-5202
Vulnerability Scoring

5.5
/10
Significant Risk

Security assessments indicate that CVE-2020-5202 presents a notable risk, potentially requiring prompt mitigation.

Attack Complexity Details

  • Attack Complexity: Low
    Exploits can be performed without significant complexity or special conditions.
  • Attack Vector: Local
    Vulnerability requires local system access.
  • Privileges Required: Low
    Some privileges are necessary to exploit the vulnerability.
  • Scope: Unchanged
    Exploit remains within the originally vulnerable component.
  • User Interaction: None
    No user interaction is necessary for exploitation.

CVE-2020-5202 Details

Status: Analyzed

Last updated: 🕗 01 Jan 2022, 20:03 UTC
Originally published on: 🕕 21 Jan 2020, 18:15 UTC

Time between publication and last update: 711 days

CVSS Release: version 3

CVSS3 Source

nvd@nist.gov

CVSS3 Type

Primary

CVSS3 Vector

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

CVE-2020-5202 Vulnerability Summary

CVE-2020-5202: apt-cacher-ng through 3.3 allows local users to obtain sensitive information by hijacking the hardcoded TCP port. The /usr/lib/apt-cacher-ng/acngtool program attempts to connect to apt-cacher-ng via TCP on localhost port 3142, even if the explicit SocketPath=/var/run/apt-cacher-ng/socket command-line option is passed. The cron job /etc/cron.daily/apt-cacher-ng (which is active by default) attempts this periodically. Because 3142 is an unprivileged port, any local user can try to bind to this port and will receive requests from acngtool. There can be sensitive data in these requests, e.g., if AdminAuth is enabled in /etc/apt-cacher-ng/security.conf. This sensitive data can leak to unprivileged local users that manage to bind to this port before the apt-cacher-ng daemon can.

Assessing the Risk of CVE-2020-5202

Access Complexity Graph

The exploitability of CVE-2020-5202 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-2020-5202

CVE-2020-5202 presents an accessible attack vector with minimal effort required. Restricting access controls and implementing security updates are critical to reducing exploitation risks.

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-2020-5202, 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-2020-5202, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: High
    Exploiting CVE-2020-5202 can result in unauthorized access to sensitive data, severely compromising data privacy.
  • Integrity: None
    CVE-2020-5202 poses no threat to data integrity.
  • Availability: None
    CVE-2020-5202 does not impact 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: 0.046% (probability of exploit)

EPSS Percentile: 20.05% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 79.95% of others.

CVE-2020-5202 References

External References

CWE Common Weakness Enumeration

NVD-CWE-noinfo

Vulnerable Configurations

  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:-:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:-:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.7.26-1:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.7.26-1:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.7.26-2:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.7.26-2:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.7.27-1:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.7.27-1:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.7.26:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.7.26:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.7.27:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.7.27:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.0:-:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.0:-:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.0-1:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.0-1:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.0-2:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.0-2:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.0-3:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.0-3:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.0:rc3:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.0:rc3:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.0:rc3-1:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.0:rc3-1:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.0:rc4:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.0:rc4:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.0:rc4-1:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.0:rc4-1:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.0:pre1:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.0:pre1:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.0:pre2:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.0:pre2:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.0:pre3:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.0:pre3:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.0:pre1-1:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.0:pre1-1:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.0:pre2-1:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.0:pre2-1:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.0:pre3-1:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.0:pre3-1:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.1:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.1:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.1-1:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.1-1:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.2:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.2:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.2-1:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.2-1:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.3:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.3:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.3-1:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.3-1:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.4:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.4:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.4-1:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.4-1:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.5:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.5:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.5-1:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.5-1:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.5-2:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.5-2:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.6:-:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.6:-:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.6-1:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.6-1:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.6:pre1:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.6:pre1:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.7:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.7:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.7-1:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.7-1:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.8:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.8:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.8-1:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.8-1:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.9:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.9:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.9-1:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.8.9-1:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.9.0:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.9.0:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.9.0-1:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.9.0-1:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.9.1:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.9.1:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.9.1-1:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.9.1-1:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.9.2:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.9.2:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.9.2-1:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.9.2-1:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.9.3:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.9.3:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.9.3-1:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.9.3-1:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.9.3.1:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.9.3.1:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.9.3.1-1:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.9.3.1-1:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.9.3.2:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.9.3.2:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.9.3.2-1:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:0.9.3.2-1:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:1:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:1:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:1-2:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:1-2:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:2:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:2:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:2-1:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:2-1:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:2-2:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:2-2:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:3:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:3:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:3-1:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:3-1:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:3-2:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:3-2:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:3-3:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:3-3:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:3-4:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:3-4:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:3-5:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:3-5:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:3.1:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:3.1:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:3.1-1:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:3.1-1:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:3.2:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:3.2:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:3.2-1:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:3.2-1:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:3.2-2:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:3.2-2:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:3.2-3:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:3.2-3:*:*:*:*:*:*:*
  • cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:3.3:*:*:*:*:*:*:*
    cpe:2.3:a:apt-cacher-ng_project:apt-cacher-ng:3.3:*:*:*:*:*:*:*
  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
    cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
    cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
    cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
  • cpe:2.3:o:opensuse:backports:sle-15:sp1:*:*:*:*:*:*
    cpe:2.3:o:opensuse:backports:sle-15:sp1:*:*:*:*:*:*
  • cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
    cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*

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