CVE-2025-8283: Netavark: podman: netavark may resolve hostnames to unexpected hosts
A vulnerability was found in the netavark package, a network stack for containers used with Podman. Due to dns.podman search domain being removed, netavark may return external servers if a valid A/AAAA record is sent as a response. When creating a container with a given name, this name will be used as the hostname for the container itself, as the podman's search domain is not added anymore the container is using the host's resolv.conf, and the DNS resolver will try to look into the search domains contained on it. If one of the domains contain a name with the same hostname as the running container, the connection will forward to unexpected external servers.
Security readout for executives and security teams
Plain-English summary
Podman containers using affected Netavark packages may resolve their own hostname to an unintended external server. This requires a hostname collision within a DNS search domain inherited from the host. The likely impact is limited disclosure of traffic or data sent to the wrong destination.
Executive priority
Treat this as routine remediation rather than an emergency. Prioritize environments handling sensitive outbound traffic or using broad, externally controlled DNS search domains. Confirm exposure and schedule vendor-approved updates through normal patching processes.
Technical view
Removal of the dns.podman search domain causes containers to use search domains from the host's resolv.conf. If a search domain provides an A or AAAA record matching the container hostname, resolution can select that external address. CVSS 3.1 is 3.7, reflecting network reachability, high attack complexity, and limited confidentiality impact.
Likely exposure
Exposure is limited to listed affected Netavark or container-tools packages on RHEL 8, 9, 10, and OpenShift 4. A practical risk requires inherited DNS search domains and a record matching a container hostname. Exact affected and fixed package versions are not supplied.
Exploitation context
The bundle provides no evidence of active exploitation, and the CVE is not listed in KEV. Exploitation requires specific DNS search-domain and hostname conditions, consistent with the high-complexity CVSS assessment. No privileges or user interaction are indicated.
Researcher notes
The issue is a DNS resolution and configuration interaction classified as CWE-15. The supplied data lists several Red Hat packages as affected but does not identify exact vulnerable or fixed versions. A generic netavark version 0 entry is marked unaffected, so package-specific vendor guidance should control conclusions.
Mitigation direction
Check Red Hat and Netavark guidance for confirmed fixed packages; exact fixed versions are not provided.
Apply vendor-approved updates when available through supported RHEL or OpenShift channels.
Review host resolv.conf search domains and remove unnecessary or untrusted entries.
Avoid container hostnames that collide with records in configured DNS search domains.
Validation and detection
Inventory Netavark and container-tools packages across RHEL and OpenShift systems.
Identify hosts whose resolv.conf contains DNS search domains inherited by containers.
Check whether container hostnames exist as A or AAAA records within those domains.
In a controlled environment, verify that container hostname resolution does not return an unexpected external address.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Potential ATT&CK relevance
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
cwe · low confidence lookup
CWE-15: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
The affected technology mentions containers, so container-specific ATT&CK technique review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
CWE-15 · source CWE mapping
External Control of System or Configuration Setting
External Control of System or Configuration Setting represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.