CVE-2020-12105 - Vulnerability Details - OpenCVE

Description

OpenConnect through 8.08 mishandles negative return values from X509_check_ function calls, which might assist attackers in performing man-in-the-middle attacks.

Published: 2020-04-23

Score: 5.9 Medium

EPSS: 1.7% Low

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

cpe:2.3:a:infradead:openconnect:*:*:*:*:*:*:*:*

Configuration 2 [-]

cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

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Advisories

Source	ID	Title
EUVD	EUVD-2020-4421	OpenConnect through 8.08 mishandles negative return values from X509_check_ function calls, which might assist attackers in performing man-in-the-middle attacks.

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

Access Vector Network

Access Complexity Medium

Authentication None

Confidentiality Impact Partial

Integrity Impact None

Availability Impact None

This CVE is not in the KEV list.

The EPSS score is 0.01695.

Key SSVC decision points have not yet been added.

References

Link	Providers
http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00039.html
https://gitlab.com/openconnect/openconnect/-/merge_requests/96
https://security.gentoo.org/glsa/202006-15

History

Fri, 11 Jul 2025 13:45:00 +0000

Type	Values Removed	Values Added
Metrics	epss `{'score': 0.00235}`	epss `{'score': 0.00171}`

Subscriptions

Infradead Openconnect

Opensuse Leap

MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2020-04-23T16:15:29.000Z

Updated: 2024-08-04T11:48:58.489Z

Reserved: 2020-04-23T00:00:00.000Z

Link: CVE-2020-12105

Vulnrichment

No data.

NVD

Status : Modified

Published: 2020-04-23T17:15:12.863

Modified: 2026-06-17T02:51:24.710

Link: CVE-2020-12105

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-755
Improper Handling of Exceptional Conditions

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