Heap-based Buffer Overflow in libarchive Affects Development Code Users
CVE-2020-21674

6.5MEDIUM

Key Information:

Vendor

Libarchive

Status
Libarchive
Vendor
CVE Published:
15 October 2020

What is CVE-2020-21674?

A heap-based buffer overflow vulnerability exists in the archive_string_append_from_wcs function within libarchive when utilizing the development code version 3.4.1dev. This flaw enables remote attackers to exploit crafted archive files, resulting in out-of-bounds writes in heap memory, which may lead to application crashes. It is important to note that this vulnerability targets users who have downloaded the development version from GitHub, while users running the official releases remain unaffected.

References

https://github.com/libarchive/libarchive/issues/1298
x_refsource_MISC
https://github.com/libarchive/libarchive/commit/4f085eea8...
x_refsource_MISC

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.