CVE-2020-16117 Security Vulnerability & Exploit Details

CVE-2020-16117
Vulnerability Scoring

5.9

/10

Significant Risk

Security assessments indicate that CVE-2020-16117 presents a notable risk, potentially requiring prompt mitigation.

Attack Complexity Details

Attack Complexity: High
Exploits require significant effort and special conditions.
Attack Vector: Network
Vulnerability is exploitable over a network without physical access.
Privileges Required: None
No privileges are required for exploitation.
Scope: Unchanged
Exploit remains within the originally vulnerable component.
User Interaction: None
No user interaction is necessary for exploitation.

CVE-2020-16117 Details

Status: Analyzed

Last updated: 🕔 11 Aug 2020, 17:29 UTC
Originally published on: 🕕 29 Jul 2020, 18:15 UTC

Time between publication and last update: 12 days

CVSS Release: version 3

CVSS3 Source

nvd@nist.gov

CVSS3 Type

Primary

CVSS3 Vector

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

CVE-2020-16117 Vulnerability Summary

CVE-2020-16117: In GNOME evolution-data-server before 3.35.91, a malicious server can crash the mail client with a NULL pointer dereference by sending an invalid (e.g., minimal) CAPABILITY line on a connection attempt. This is related to imapx_free_capability and imapx_connect_to_server.

Assessing the Risk of CVE-2020-16117

Access Complexity Graph

The exploitability of CVE-2020-16117 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-2020-16117

CVE-2020-16117 presents a challenge to exploit due to its high attack complexity, but the absence of privilege requirements still makes it a viable target for skilled attackers. A thorough security review is advised.

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-2020-16117, 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-2020-16117, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

Confidentiality: None
CVE-2020-16117 has no significant impact on data confidentiality.
Integrity: None
CVE-2020-16117 poses no threat to data integrity.
Availability: High
CVE-2020-16117 can disrupt system operations, potentially causing complete denial of service (DoS).

Exploit Prediction Scoring System (EPSS)

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

EPSS Score: 0.231% (probability of exploit)

EPSS Percentile: 61.61% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 38.39% of others.

CVE-2020-16117 References

External References

CWE Common Weakness Enumeration

CWE-476

Vulnerable Configurations

cpe:2.3:a:gnome:evolution-data-server:-:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:-:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.22.0:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.22.0:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.22.1:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.22.1:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.22.2:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.22.2:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.22.3:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.22.3:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.22.4:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.22.4:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.22.5:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.22.5:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.22.6:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.22.6:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.22.7:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.22.7:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.23.1:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.23.1:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.23.2:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.23.2:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.23.3:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.23.3:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.23.4:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.23.4:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.23.90:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.23.90:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.23.91:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.23.91:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.23.92:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.23.92:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.24.0:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.24.0:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.24.1:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.24.1:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.24.2:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.24.2:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.24.3:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.24.3:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.24.4:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.24.4:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.24.5:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.24.5:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.24.6:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.24.6:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.24.7:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.24.7:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.25.1:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.25.1:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.25.2:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.25.2:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.25.3:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.25.3:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.25.4:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.25.4:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.25.90:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.25.90:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.25.91:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.25.91:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.25.92:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.25.92:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.26.0:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.26.0:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.26.1:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.26.1:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.26.2:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.26.2:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.26.2.1:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.26.2.1:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.26.3:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.26.3:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.26.4:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.26.4:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.26.5:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.26.5:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.26.6:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.26.6:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.27.1:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.27.1:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.27.2:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.27.2:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.27.3:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.27.3:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.27.4:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.27.4:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.27.90:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.27.90:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.27.91:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.27.91:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.27.92:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.27.92:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.28.0:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.28.0:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.28.1:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.28.1:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.28.2:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.28.2:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.28.3:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.28.3:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.28.4:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.28.4:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.28.5:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.28.5:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.29.1:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.29.1:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.29.2:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.29.2:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.29.3:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.29.3:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.29.4:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.29.4:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.29.90:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.29.90:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.29.91:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.29.91:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.29.92:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.29.92:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.30.0:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.30.0:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.30.1:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.30.1:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.30.2:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.30.2:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.30.3:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.30.3:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.30.4:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.30.4:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.30.5:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.30.5:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.31.1:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.31.1:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.31.2:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.31.2:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.31.3:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.31.3:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.31.4:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.31.4:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.31.90:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.31.90:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.31.91:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.31.91:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.31.92:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.31.92:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.32.0:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.32.0:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.32.1:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.32.1:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.32.2:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.32.2:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.32.3:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.32.3:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.32.4:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.32.4:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.32.5:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.32.5:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.33.1:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.33.1:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.33.2:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.33.2:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.33.3:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.33.3:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.33.4:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.33.4:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.33.90:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.33.90:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.33.91:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.33.91:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.33.92:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.33.92:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.34.0:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.34.0:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.34.1:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.34.1:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.34.2:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.34.2:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.34.3:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.34.3:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.34.4:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.34.4:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.35.1:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.35.1:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.35.2:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.35.2:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.35.3:*:*:*:*:*:*:*
cpe:2.3:a:gnome:evolution-data-server:3.35.3:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

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CVE-2020-16117 Vulnerability Scoring