CVE-2021-31522
Apache Kylin unsafe class loading
No known exploitation. EPSS puts it in the 87th percentile. Fixed in 3.1.3.
What to do
Find your product and version, then upgrade to the build on the right.
- Apache Software Foundation Apache KylinAffected: ≥ Apache Kylin 2, ≤ 2.6.6Upgrade to: after 2.6.6Affected: ≥ Apache Kylin 3, ≤ 3.1.2Upgrade to: after 3.1.2Affected: ≥ Apache Kylin 4, ≤ 4.0.0Upgrade to: after 4.0.0Stated by: CVE record
- Maven org.apache.kylin:kylinAffected: < 3.1.3Upgrade to: 3.1.3Stated by: GitHub advisory
Versions as the sources state them. Full version matrix after sign-in
What it is
From the CVE record
Kylin can receive user input and load any class through Class.forName(...). This issue affects Apache Kylin 2 version 2.6.6 and prior versions; Apache Kylin 3 version 3.1.2 and prior versions; Apache Kylin 4 version 4.0.0 and prior versions.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
2.9% chance of exploitation activity in the next 30 days, which ranks it in the 87th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
7 events over 1631 days, from the signal feeds we watch.
- OpenVAS check added
- Patch availableworkaround available, record updated
- Publishedweakness classified, att&ck mapped
Affected products
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Scored 9.8 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required NoneNo authentication required — anyone can exploit this
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity HighTotal loss of integrity — attacker can modify any data in the component
- Availability HighTotal denial of service — the component is completely unavailable
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
Sources
References in the record
- openwall.com/lists/oss-security/2022/01/06/4
- lists.apache.org/thread/hh5crx3yr701zd8wtpqo1mww2rlkvznw
- nvd.nist.gov/vuln/detail/CVE-2021-31522
And 3 more references. See all after sign-in
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