CVE-2021-3520
Last modified
CVE-2021-3520 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. There's a flaw in lz4. An attacker who submits a crafted file to an application linked with lz4 may be able to trigger an integer overflow, leading to calling of memmove() on a negative size argument, causing an out-of-bounds write and/or a crash. EPSS estimates a 3.22% chance of exploitation in the next 30 days.
Description
There's a flaw in lz4. An attacker who submits a crafted file to an application linked with lz4 may be able to trigger an integer overflow, leading to calling of memmove() on a negative size argument, causing an out-of-bounds write and/or a crash. The greatest impact of this flaw is to availability, with some potential impact to confidentiality and integrity as well.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Lz4 Project | Lz4 | >= 1.8.3, < 1.9.4 |
| Netapp | Active Iq Unified Manager | All versions |
| Netapp | Cloud Backup | All versions |
| Netapp | Ontap Select Deploy Administration Utility | All versions |
| Oracle | Communications Cloud Native Core Policy | 1.14.0 |
| Oracle | Zfs Storage Appliance Kit | 8.8 |
| Splunk | Universal Forwarder | >= 8.2.0, < 8.2.12 |
| Splunk | Universal Forwarder | >= 9.0.0, < 9.0.6 |
| Splunk | Universal Forwarder | 9.1.0 |
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1954559Issue Tracking, Patch, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20211104-0005/Third Party Advisory
- https://www.oracle.com//security-alerts/cpujul2021.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1954559Issue Tracking, Patch, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20211104-0005/Third Party Advisory
- https://www.oracle.com//security-alerts/cpujul2021.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-3520?
How severe is CVE-2021-3520?
How do I fix CVE-2021-3520?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2021
- CVE-2021-3519A vulnerability was reported in some Lenovo Desktop models t…6.8
- CVE-2021-35193Patterson Application Service in Patterson Eaglesoft 18 thro…7.5
- CVE-2021-35196Manuskript through 0.12.0 allows remote attackers to execute…7.8
- CVE-2021-35197In MediaWiki before 1.31.15, 1.32.x through 1.35.x before 1.…7.5
- CVE-2021-35198NETSCOUT nGeniusONE 6.3.0 build 1004 and earlier allows Stor…5.4
- CVE-2021-35199NETSCOUT nGeniusONE 6.3.0 build 1196 and earlier allows Stor…5.4
- CVE-2021-35200NETSCOUT nGeniusONE 6.3.0 build 1196 allows high-privileged …4.8
- CVE-2021-35201NEI in NETSCOUT nGeniusONE 6.3.0 build 1196 allows XML Exter…6.5
- CVE-2021-35202NETSCOUT Systems nGeniusONE 6.3.0 build 1196 allows Authoriz…4.3
- CVE-2021-35203NETSCOUT Systems nGeniusONE 6.3.0 build 1196 allows Arbitrar…5.7
- CVE-2021-35204NETSCOUT Systems nGeniusONE 6.3.0 build 1196 allows Reflecte…5.4
- CVE-2021-35205NETSCOUT Systems nGeniusONE version 6.3.0 build 1196 allows …5.4
Are you affected by CVE-2021-3520?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST