01 Record

CVE-2019-14899

A vulnerability was discovered in Linux, FreeBSD, OpenBSD, MacOS, iOS, and Android that allows a malicious access point, or an adjacent user, to determine if a connected user is using a VPN, make

HighPUBLISHEDCNA: redhat

CNA base score7.4 CVSS v3.xCVSS:3.0/AV:A/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

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02 Description

A vulnerability was discovered in Linux, FreeBSD, OpenBSD, MacOS, iOS, and Android that allows a malicious access point, or an adjacent user, to determine if a connected user is using a VPN, make

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 0.83% probability of exploitation activity in the next 30 days.
EPSS percentile: Equal to or higher than the score of 57.4% of scored records. A rank, not a probability.
NVD base score: 7.4 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
NVD analysis status: Modified. NVD last modified this record on 2026-06-17.
Red Hat severity: Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2019-12-11 14:45Z6 YR AGO

Last updated

2024-08-05 00:26Z2 YR AGO

Reserved

2019-08-10

Assigning CNA

redhat

Record state

PUBLISHED

Severity

High (CVSS 7.4)

CNA CVSS vector

CVSS:3.0/AV:A/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Weaknesses

CWE-300Channel Accessible by Non-EndpointClass

Data version

5.1

Document digest

4e3544c687ab0b2b1d901fdd9b242810958338a8b14b8b72cbc6cfc519613f49

05 Affected products

VendorProductVersionsPlatforms

Red HatVPNNot specified—

06 References

bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14899x_refsource_CONFIRM
openvpn.nethttps://openvpn.net/security-advisory/no-flaws-found-in-openvpn-software/x_refsource_MISC
support.apple.comhttps://support.apple.com/kb/HT211288x_refsource_CONFIRM
support.apple.comhttps://support.apple.com/kb/HT211290x_refsource_CONFIRM
support.apple.comhttps://support.apple.com/kb/HT211289x_refsource_CONFIRM
seclists.org20200717 APPLE-SA-2020-07-15-3 tvOS 13.4.8http://seclists.org/fulldisclosure/2020/Jul/25mailing-listx_refsource_FULLDISC
seclists.org20200717 APPLE-SA-2020-07-15-2 macOS Catalina 10.15.6, Security Update 2020-004 Mojave, Security Update 2020-004 High Sierrahttp://seclists.org/fulldisclosure/2020/Jul/24mailing-listx_refsource_FULLDISC
seclists.org20200717 APPLE-SA-2020-07-15-1 iOS 13.6 and iPadOS 13.6http://seclists.org/fulldisclosure/2020/Jul/23mailing-listx_refsource_FULLDISC
www.openwall.com[oss-security] 20200813 Blind in/on-path attacks against VPN-tunneled connections (CVE-2019-14899 follow-up)http://www.openwall.com/lists/oss-security/2020/08/13/2mailing-listx_refsource_MLIST
support.apple.comhttps://support.apple.com/kb/HT211850x_refsource_CONFIRM
www.openwall.com[oss-security] 20201007 Re: [CVE-2019-14899] Inferring and hijacking VPN-tunneled TCP connections.http://www.openwall.com/lists/oss-security/2020/10/07/3mailing-listx_refsource_MLIST
support.apple.comhttps://support.apple.com/kb/HT211931x_refsource_CONFIRM
seclists.org20201115 APPLE-SA-2020-11-13-3 Additional information for APPLE-SA-2020-09-16-1 iOS 14.0 and iPadOS 14.0http://seclists.org/fulldisclosure/2020/Nov/20mailing-listx_refsource_FULLDISC
seclists.org20201215 APPLE-SA-2020-12-14-4 Additional information for APPLE-SA-2020-11-13-1 macOS Big Sur 11.0.1http://seclists.org/fulldisclosure/2020/Dec/32mailing-listx_refsource_FULLDISC
www.openwall.com[oss-security] 20210704 Re: Blind in/on-path attacks against VPN-tunneled connections (CVE-2019-14899 follow-up)http://www.openwall.com/lists/oss-security/2021/07/05/1mailing-listx_refsource_MLIST