Summary
Apache Solr Operator liveness and readiness probes may leak basic auth credentials
Insertion of Sensitive Information into Log File vulnerability in the Apache Solr Operator.
This issue affects all versions of the Apache Solr Operator from 0.3.0 through 0.8.0.
When asked to bootstrap Solr security, the operator will enable basic authentication and create several accounts for accessing Solr: including the "solr" and "admin" accounts for use by end-users, and a "k8s-oper" account which the operator uses for its own requests to Solr.
One common source of these operator requests is healthchecks: liveness, readiness, and startup probes are all used to determine Solr's health and ability to receive traffic.
By default, the operator configures the Solr APIs used for these probes to be exempt from authentication, but users may specifically request that authentication be required on probe endpoints as well.
Whenever one of these probes would fail, if authentication was in use, the Solr Operator would create a Kubernetes "event" containing the username and password of the "k8s-oper" account.
Within the affected version range, this vulnerability affects any solrcloud resource which (1) bootstrapped security through use of the .solrOptions.security.authenticationType=basic option, and (2) required authentication be used on probes by setting .solrOptions.security.probesRequireAuth=true.
Users are recommended to upgrade to Solr Operator version 0.8.1, which fixes this issue by ensuring that probes no longer print the credentials used for Solr requests. Users may also mitigate the vulnerability by disabling authentication on their healthcheck probes using the setting .solrOptions.security.probesRequireAuth=false.
Impact
CVE-2024-31391 has a CVSS score of 4.7 (Medium). The vector is requires local access, low 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 (0.8.1); upgrading removes the vulnerable code path.
Affected versions
Security releases
Kodem intelligence
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. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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Frequently Asked Questions
- What is CVE-2024-31391? CVE-2024-31391 is a medium-severity security vulnerability in github.com/apache/solr-operator (go), affecting versions >= 0.3.0, < 0.8.1. It is fixed in 0.8.1.
- How severe is CVE-2024-31391? CVE-2024-31391 has a CVSS score of 4.7 (Medium). 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.
- Which versions of github.com/apache/solr-operator are affected by CVE-2024-31391? github.com/apache/solr-operator (go) versions >= 0.3.0, < 0.8.1 is affected.
- Is there a fix for CVE-2024-31391? Yes. CVE-2024-31391 is fixed in 0.8.1. Upgrade to this version or later.
- Is CVE-2024-31391 exploitable, and should I be worried? Whether CVE-2024-31391 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
- What actually determines whether CVE-2024-31391 is exploitable, and how bad it is? 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.
- How do I fix CVE-2024-31391? Upgrade
github.com/apache/solr-operatorto 0.8.1 or later.