What is the CVSS score of CVE-2020-15701?

CVE-2020-15701 has a CVSS 3.1 base score of 5.5 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.4%.

Is there a public PoC exploit available for CVE-2020-15701?

Yes, a public proof-of-concept exploit is available for CVE-2020-15701. Prioritise patching immediately. EPSS: 0.4%.

Apport CVE-2020-15701

MEDIUM

Improper Handling of Exceptional Conditions (CWE-755)

2020-08-06 security@ubuntu.com

Denial Of Service Canonical Ubuntu Linux Apport

5.5

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-755 OWASP Top 10:2025 A10:2025 - Mishandling of Exceptional Conditions ASVS 5.0 V16 - Security Logging and Error Handling Exception handling procedures
Impact	CVSS score of 5.5 (MEDIUM). Attack characteristics: local attack vector, low complexity, low privileges required, no user interaction not required. Public proof-of-concept exploit code is available.
Exploit ScenarioDerived	Successful exploitation could compromise the medium-severity affected system.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

No patch listed yet 0.4% exploitation probability (EPSS)

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AnalysisAI

An unhandled exception in check_ignored() in apport/report.py can be exploited by a local attacker to cause a denial of service. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

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Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified under CWE-755. An unhandled exception in check_ignored() in apport/report.py can be exploited by a local attacker to cause a denial of service. If the mtime attribute is a string value in apport-ignore.xml, it will trigger an unhandled exception, resulting in a crash. Fixed in 2.20.1-0ubuntu2.24, 2.20.9-0ubuntu7.16, 2.20.11-0ubuntu27.6. Affected products include: Canonical Apport, Canonical Ubuntu Linux.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 5.5 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

DescriptionNVD

An unhandled exception in check_ignored() in apport/report.py can be exploited by a local attacker to cause a denial of service. If the mtime attribute is a string value in apport-ignore.xml, it will trigger an unhandled exception, resulting in a crash. Fixed in 2.20.1-0ubuntu2.24, 2.20.9-0ubuntu7.16, 2.20.11-0ubuntu27.6.

Threat Intelligence Overview

EPSS Score

0.4%

Top 65% exploitable

Exploit

POC

Public exploit code exists

Data Quality

2 sources

Confidence: Low

NVD

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity MEDIUM

CISA KEV No

Public POC Yes

EPSS 0.4%

Patch available No

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

Poc

System Exposure· derived

Small

Automatable· derived

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +28

PoC: +20

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Denial of Service MEDIUM

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

Affected Products (CPE)NVD

cpe:2.3:a:canonical:apport:2.20.11-0ubuntu8:*:*:*:*:*:*:*

cpe:2.3:a:canonical:apport:2.20.11-0ubuntu9:*:*:*:*:*:*:*

cpe:2.3:a:canonical:apport:2.20.11-0ubuntu10:*:*:*:*:*:*:*

cpe:2.3:a:canonical:apport:2.20.11-0ubuntu11:*:*:*:*:*:*:*

cpe:2.3:a:canonical:apport:2.20.11-0ubuntu12:*:*:*:*:*:*:*

cpe:2.3:a:canonical:apport:2.20.11-0ubuntu13:*:*:*:*:*:*:*

cpe:2.3:a:canonical:apport:2.20.11-0ubuntu14:*:*:*:*:*:*:*

cpe:2.3:a:canonical:apport:2.20.11-0ubuntu15:*:*:*:*:*:*:*

cpe:2.3:a:canonical:apport:2.20.11-0ubuntu16:*:*:*:*:*:*:*

cpe:2.3:a:canonical:apport:2.20.11-0ubuntu17:*:*:*:*:*:*:*

cpe:2.3:a:canonical:apport:2.20.11-0ubuntu18:*:*:*:*:*:*:*

cpe:2.3:a:canonical:apport:2.20.11-0ubuntu19:*:*:*:*:*:*:*

cpe:2.3:a:canonical:apport:2.20.11-0ubuntu20:*:*:*:*:*:*:*

cpe:2.3:a:canonical:apport:2.20.11-0ubuntu21:*:*:*:*:*:*:*

cpe:2.3:a:canonical:apport:2.20.11-0ubuntu22:*:*:*:*:*:*:*

cpe:2.3:a:canonical:apport:2.20.11-0ubuntu23:*:*:*:*:*:*:*

cpe:2.3:a:canonical:apport:2.20.11-0ubuntu24:*:*:*:*:*:*:*

cpe:2.3:a:canonical:apport:2.20.11-0ubuntu25:*:*:*:*:*:*:*

cpe:2.3:a:canonical:apport:2.20.11-0ubuntu26:*:*:*:*:*:*:*

cpe:2.3:a:canonical:apport:2.20.11-0ubuntu27:*:*:*:*:*:*:*

+ 84 more

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References

Advisories & patches

ADVISORY https://usn.ubuntu.com/4449-1 ADVISORY https://usn.ubuntu.com/4449-1/ ADVISORY https://usn.ubuntu.com/4449-2/

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GitHub PoC

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