CVE-2017-9233 XML external entity in n/a

What is CVE-2017-9233?

CVE-2017-9233 is a high-severity vulnerability in Debian Debian Linux, published on 25 Jul 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

XML External Entity vulnerability in libexpat 2.2.0 and earlier (Expat XML Parser Library) allows attackers to put the parser in an infinite loop using a malformed external entity definition from an external DTD.

Weakness: CWE-835, CWE-611

Which versions are affected by CVE-2017-9233?

It affects 3 products.

Products include Debian Debian Linux, Libexpat Project Libexpat, Python Python.

How do I fix CVE-2017-9233?

Upgrade to a fixed version.

Is CVE-2017-9233 being exploited?

There is no known exploitation of CVE-2017-9233 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

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• 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 ALPINE-CVE-2017-9233, CLEANSTART-2026-WS52182, DEBIAN-CVE-2017-9233, DLA-990-1, DSA-3898-1, GHSA-6j8w-m4cc-r7hm and 4 more.