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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.021 (80.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 81st percentile — 80.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.021 · newest: 0.021 · change: 0.000
Affected products
- Libarchive — versions 3.4.1
Weakness classification (CWE)
References
- github.com/libarchive/libarchive/issues/1298 (Third Party Advisory)
- github.com/libarchive/libarchive/commit/4f085eea879e2be745f4d9bf57e8513ae48157f4 (Patch, Third Party Advisory)
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.