Integer Overflow Vulnerability in lz4 Affecting Various Applications
CVE-2021-3520

9.8CRITICAL

Key Information:

Vendor

Lz4 Project

Status
Lz4
Vendor
CVE Published:
2 June 2021

What is CVE-2021-3520?

A vulnerability in the lz4 library allows attackers to exploit an integer overflow by submitting a specially crafted file to an application that utilizes lz4. This may result in an attempt to execute a 'memmove()' operation with a negative size argument, potentially triggering an out-of-bounds write and leading to application crashes. The primary impact is on the application's availability, with some risks extending to confidentiality and integrity of data as well.

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Affected Version(s)

lz4 lz4-1.8.3

References

https://bugzilla.redhat.com/show_bug.cgi?id=1954559
x_refsource_MISC
https://www.oracle.com//security-alerts/cpujul2021.html
x_refsource_MISC
https://www.oracle.com/security-alerts/cpuoct2021.html
x_refsource_MISC

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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