CVE-2017-3204 is a high-severity security vulnerability in golang.org/x/crypto (go), affecting versions < 0.0.0-20170330155735-e4e2799dd7aa. It is fixed in 0.0.0-20170330155735-e4e2799dd7aa.
The Go SSH library (golang.org/x/crypto/ssh) by default does not verify host keys, facilitating man-in-the-middle attacks if ClientConfig.HostKeyCallback is not set. Default behavior changed in commit e4e2799 to require explicitly registering a hostkey verification mechanism.
CVE-2017-3204 has a CVSS score of 8.1 (High). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment.
A fixed version is available (0.0.0-20170330155735-e4e2799dd7aa). Upgrading removes the vulnerable code path.
go
golang.org/x/crypto (< 0.0.0-20170330155735-e4e2799dd7aa)golang.org/x/crypto → 0.0.0-20170330155735-e4e2799dd7aa (go)Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter instead of chasing every advisory.
Kodem's runtime-powered SCA identifies whether CVE-2017-3204 is reachable in your applications. Explore open-source security for your team.
See if CVE-2017-3204 is reachable in your applications. Get a demo
Already deployed Kodem? See CVE-2017-3204 in your environment →Upgrade golang.org/x/crypto to 0.0.0-20170330155735-e4e2799dd7aa or later to resolve this vulnerability.
Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.
CVE-2017-3204 is a high-severity security vulnerability in golang.org/x/crypto (go), affecting versions < 0.0.0-20170330155735-e4e2799dd7aa. It is fixed in 0.0.0-20170330155735-e4e2799dd7aa.
CVE-2017-3204 has a CVSS score of 8.1 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
golang.org/x/crypto (go) versions < 0.0.0-20170330155735-e4e2799dd7aa is affected.
Yes. CVE-2017-3204 is fixed in 0.0.0-20170330155735-e4e2799dd7aa. Upgrade to this version or later.
Whether CVE-2017-3204 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
Upgrade golang.org/x/crypto to 0.0.0-20170330155735-e4e2799dd7aa or later.