Is CVE-2020-1918 in the CISA KEV catalog?

No. CVE-2020-1918 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-1918?

CVE-2020-1918 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2020-1918?

CVE-2020-1918 has an EPSS score of 1.22% (65th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-1918?

Upgrade hhvm to 4.93.2 or later.

CVE & CISA-KEV Catalog

CVE-2020-1918

HIGH

7.5

CVSS v3

NVD

Description

In-memory file operations (ie: using fopen on a data URI) did not properly restrict negative seeking, allowing for the reading of memory prior to the in-memory buffer. This issue affects HHVM versions prior to 4.56.3, all versions between 4.57.0 and 4.80.1, all versions between 4.81.0 and 4.93.1, and versions 4.94.0, 4.95.0, 4.96.0, 4.97.0, 4.98.0.

CWE-127 CWE-125Out-of-bounds Read

How to fix

Remediation Available

hhvmNVD

Affected:>= 4.81.0, < 4.93.2Fixed in:4.93.2CVE-2020-1918derived from NVD

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

Exploit Intelligence

1.22%probability of exploitation in 30 days

65thpercentile

Moderate risk: more likely to be exploited than 65% of all known CVEs.

References

Patch1

github.com

Vendor Advisory1

hhvm.com

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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.