CVE-2017-18265 Denial of service in n/a

What is CVE-2017-18265?

CVE-2017-18265 is a high-severity denial of service vulnerability in Debian Debian Linux, published on 9 May 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Prosody before 0.10.0 allows remote attackers to cause a denial of service (application crash), related to an incompatibility with certain versions of the LuaSocket library, such as the lua-socket package from Debian stretch. The attacker needs to trigger a stream error. A crash can be observed in, for example, the c2s module.

Which versions are affected by CVE-2017-18265?

It affects 2 products.

Products include Debian Debian Linux, Prosody Prosody.

How do I fix CVE-2017-18265?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2017-18265 being exploited?

There is no known exploitation of CVE-2017-18265 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-2017-18265, DSA-4198-1, GHSA-3xch-grx2-hhmh, UBUNTU-CVE-2017-18265.