CVE-2020-21674: Buffer Overflow

Published Oct 15, 2020

Updated

Heap-based buffer overflow in archivestringappendfromwcs() (archivestring.c) in libarchive-3.4.1dev allows remote attackers to cause a denial of service (out-of-bounds write in heap memory resulting into a crash) via a crafted archive file. NOTE: this only affects users who downloaded the development code from GitHub. Users of the product's official releases are unaffected.

Affected Software

1 affected component

Libarchive libarchive=3.4.1

Remediation

Patch Available

https://github.com/libarchive/libarchive/commit/4f085eea879e2be745f4d9bf57e8513ae48157f4

Event History

Oct 15, 2020

CVE Published

via MITRE·02:59 PM

Data Sourced

via MITRE·02:59 PM

Description

Frequently Asked Questions

What is the vulnerability ID for this heap-based buffer overflow?

The vulnerability ID is CVE-2020-21674.

What is the severity of CVE-2020-21674?

The severity of CVE-2020-21674 is medium with a CVSS score of 6.5.

Which software version is affected by this vulnerability?

The vulnerability affects libarchive version 3.4.1.

How can the vulnerability be exploited?

The vulnerability can be exploited by remote attackers through a crafted archive file, causing a denial of service and potentially crashing the system.

Is there a fix available for this vulnerability?

Yes, a fix for this vulnerability is available. Please refer to the provided references for more information.