CVE-2021-3520

moderate-risk
Published 2021-06-02

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.

Do I need to act?

-
0.14% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
+
Fix available
Upgrade to: 5ff839680134437dbf4678f3d0c7b371d84f4964
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (8)

Lz4

Affected Vendors

Oracle Netapp Splunk Lz4 Project

References (10)

Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1954559
Third Party Advisory https://security.netapp.com/advisory/ntap-20211104-0005/
Patch https://www.oracle.com//security-alerts/cpujul2021.html
Patch https://www.oracle.com/security-alerts/cpuapr2022.html
Patch https://www.oracle.com/security-alerts/cpuoct2021.html
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1954559
Third Party Advisory https://security.netapp.com/advisory/ntap-20211104-0005/
Patch https://www.oracle.com//security-alerts/cpujul2021.html
Patch https://www.oracle.com/security-alerts/cpuapr2022.html
Patch https://www.oracle.com/security-alerts/cpuoct2021.html
47
/ 100
moderate-risk
Severity 32/34 · Critical
Exploitability 1/34 · Minimal
Exposure 14/34 · Moderate