What is CVE-2020-21674?

CVE-2020-21674 is a medium-severity vulnerability in Libarchive, classified under Out-of-bounds Write. CVSS score: 6.5/10. Published 2020-10-15.

How severe is CVE-2020-21674?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Buffer overflow in Libarchive

CVE-2020-21674

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.

Vulnerability class: Buffer Overflow

EPSS: 0.021 (79.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

Libarchive — versions 3.4.1
N/a — versions n/a

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

cve@mitre.org (Third Party Advisory, x_refsource_MISC)
cve@mitre.org (Patch, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2020-21674?: CVE-2020-21674 is a medium-severity vulnerability in Libarchive, classified under Out-of-bounds Write. CVSS score: 6.5/10. Published 2020-10-15.
How severe is CVE-2020-21674?: Medium severity. CVSS v3 base score is 6.5 out of 10.