Is CVE-2019-11842 in the CISA KEV catalog?

No. CVE-2019-11842 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2019-11842?

CVE-2019-11842 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2019-11842?

CVE-2019-11842 has an EPSS score of 1.78% (76th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2019-11842?

Upgrade matrix-synapse on debian unstable to 0.99.2-5 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2019-11842

HIGHEPSS 76th pctl

7.5

CVSS v3

NVD

Description

An issue was discovered in Matrix Sydent before 1.0.3 and Synapse before 0.99.3.1. Random number generation is mishandled, which makes it easier for attackers to predict a Sydent authentication token or a Synapse random ID.

CWE-338

How to fix

Remediation Available

matrix-synapseDebian

Fixed in:0.99.2-5CVE-2019-11842

matrix-synapseUbuntu

Fixed in:0.24.0+dfsg-1ubuntu0.1~esm1USN-6076-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

1.78%probability of exploitation in 30 days

76thpercentile

Elevated risk: more likely to be exploited than 76% of all known CVEs.

References

Vendor Advisory1

matrix.org

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.