CVE-2017-17847 Security feature bypass in n/a

What is CVE-2017-17847?

CVE-2017-17847 is a high-severity vulnerability in Debian Debian Linux, published on 22 Dec 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue was discovered in Enigmail before 1.9.9. Signature spoofing is possible because the UI does not properly distinguish between an attachment signature, and a signature that applies to the entire containing message, aka TBE-01-021. This is demonstrated by an e-mail message with an attachment that is a signed e-mail message in message/rfc822 format.

Weakness: CWE-347

Which versions are affected by CVE-2017-17847?

It affects 2 products.

Products include Debian Debian Linux, Enigmail Enigmail.

How do I fix CVE-2017-17847?

Upgrade to a fixed version.

Is CVE-2017-17847 being exploited?

There is no known exploitation of CVE-2017-17847 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2017-17847, GHSA-c53x-x7fc-9vrp, UBUNTU-CVE-2017-17847.