CVE-2021-451055.9MediumCWE-674

CVE-2021-45105: Apache Log4j2 does not always protect from infinite recursion in lookup evaluation

Apache Software Foundation · Apache Log4j2

Vendor fix available · Affected: Apache Software Foundation Apache Log4j2 · Exploitation: likely to be exploited (10% or more)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

99.9%probability of exploitation in the next 30 days

99th percentile

050100

Higher than 99% of scored CVEs

5.9MediumCVSS 3.1

LowMediumHighCrit.

DescriptionCVE.org

Apache Log4j2 versions 2.0-alpha1 through 2.16.0 (excluding 2.12.3 and 2.3.1) did not protect from uncontrolled recursion from self-referential lookups. This allows an attacker with control over Thread Context Map data to cause a denial of service when a crafted string is interpreted. This issue was fixed in Log4j 2.17.0, 2.12.3, and 2.3.1.

Affected products1

From the CVE record. A product or version that is not listed is unknown, not unaffected.

Apache Software Foundation · Apache Log4j2from log4j-core before 2.17.0

On the Atlas

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Open the Atlas

Exploitation: Likely to be exploited (10% or more). EPSS gives it a 10% or higher chance of exploitation in the next 30 days.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Uncontrolled Recursion · Denial of Service
Vendor: Apache Software Foundation
Published: December 2021
Band: Likely to be exploited (10% or more), December 2021

CoverageNo articles yet

No CyberSIXT article names CVE-2021-45105 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.

References

1 more reference is in the CVE record.