Bug 2116725 (CVE-2022-30698)
| Summary: | CVE-2022-30698 unbound: novel ghost domain attack that allows attackers to trigger continued resolvability of malicious domain names | ||
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| Product: | [Other] Security Response | Reporter: | Sandipan Roy <saroy> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED ERRATA | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | unspecified | CC: | aegorenkov.91, akhaitovich, paul.wouters, pemensik, pj.pandit |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | unbound 1.16.2 | Doc Type: | If docs needed, set a value |
| Doc Text: |
A flaw was found in Unbound, which is vulnerable to a novel type of "ghost domain names" attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a subdomain of a rogue domain name. The rogue nameserver returns delegation information for the subdomain that updates Unbound's delegation cache. This action can be repeated before the expiry of the delegation information by querying Unbound for a second-level subdomain in which the rogue nameserver provides new delegation information. Since Unbound is a child-centric resolver, the ever-updating child delegation information can keep a rogue domain name resolvable long after revocation.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2022-12-06 12:20:28 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 2116730, 2116731, 2116732, 2116733 | ||
| Bug Blocks: | 2113806 | ||
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Description
Sandipan Roy
2022-08-09 09:19:53 UTC
Upstream Patch: https://github.com/NLnetLabs/unbound/commit/f6753a0f1018133df552347a199e0362fc1dac68 Created unbound tracking bugs for this issue: Affects: fedora-35 [bug 2116731] Affects: fedora-36 [bug 2116732] This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2022:7622 https://access.redhat.com/errata/RHSA-2022:7622 This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2022:8062 https://access.redhat.com/errata/RHSA-2022:8062 This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2022-30698 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.6 Extended Update Support Via RHSA-2024:2045 https://access.redhat.com/errata/RHSA-2024:2045 |