Bug 2405974 (CVE-2025-62820)
| Summary: | CVE-2025-62820 nebula: incorrect handling of CIDR in some configurations allows arbitrary source IP addresses within the network | ||
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| Product: | [Other] Security Response | Reporter: | OSIDB Bzimport <bzimport> |
| Component: | vulnerability | Assignee: | Product Security DevOps Team <prodsec-dev> |
| Status: | NEW --- | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | unspecified | CC: | abuckta, aprice, bdettelb, caswilli, cmah, crizzo, dkuc, doconnor, gtanzill, jbuscemi, jdobes, jmitchel, jsamir, jsherril, jvasik, kaycoth, kgaikwad, kshier, mpierce, oezr, orabin, rblanco, rochandr, stcannon, sthirugn, teagle, vkrizan, vmugicag, yguenane |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | --- | |
| Doc Text: |
A flaw was found in Slack Nebula. An improper CIDR construction in the hostmap logic makes the inbound firewall overly permissive for nodes with certificates allowing subnets or multiple IPs. An attacker controlling such a node can send packets with arbitrary source IP addresses within the network. This allows the attacker to impersonate other nodes, disrupt traffic via TCP RST packets, or send arbitrary UDP packets.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | Type: | --- | |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
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Description
OSIDB Bzimport
2025-10-23 04:01:38 UTC
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