CVE-2017-15923 Denial of service in n/a

What is CVE-2017-15923?

CVE-2017-15923 is a high-severity denial of service vulnerability in Debian Debian Linux, published on 15 Nov 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Konversation 1.4.x, 1.5.x, 1.6.x, and 1.7.x before 1.7.3 allow remote attackers to cause a denial of service (crash) via vectors related to parsing of IRC color formatting codes.

Which versions are affected by CVE-2017-15923?

It affects 2 products.

Products include Debian Debian Linux, Konversation Konversation.

How do I fix CVE-2017-15923?

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-2017-15923 being exploited?

There is no known exploitation of CVE-2017-15923 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-2017-15923, DLA-1174-1, DSA-4033-1, GHSA-gmxc-2h86-8gwf, MGASA-2017-0419, UBUNTU-CVE-2017-15923 and 1 more.