CVE-2020-21674 — MEDIUM (6.5)

Vulnerability Description

Heap-based buffer overflow in archive_string_append_from_wcs() (archive_string.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.

CVSS Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Libarchive	Libarchive	3.4.1

Related Weaknesses (CWE)

CWE-787

References

https://github.com/libarchive/libarchive/commit/4f085eea879e2be745f4d9bf57e8513aPatchThird Party Advisory
https://github.com/libarchive/libarchive/issues/1298Third Party Advisory
https://github.com/libarchive/libarchive/commit/4f085eea879e2be745f4d9bf57e8513aPatchThird Party Advisory
https://github.com/libarchive/libarchive/issues/1298Third Party Advisory

FAQ

What is CVE-2020-21674?

CVE-2020-21674 is a vulnerability with a CVSS score of 6.5 (MEDIUM). Heap-based buffer overflow in archive_string_append_from_wcs() (archive_string.c) in libarchive-3.4.1dev allows remote attackers to cause a denial of service (out-of-bounds write in heap memory result...

How severe is CVE-2020-21674?

CVE-2020-21674 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2020-21674?

Check the references section above for vendor advisories and patch information. Affected products include: Libarchive Libarchive.