Security readout for executives and security teams
Plain-English summary
This CVE concerns a Red Hat Enterprise Linux 7 build of Unbound where a prior fix was incomplete. A vulnerable resolver could turn one incoming DNS query into many outbound queries toward a target, creating amplification risk. The sources do not provide CVSS, confirmed exploitation, or a named fixed package.
Executive priority
Treat this as a targeted infrastructure hygiene issue, not a broad emergency. Confirm whether RHEL 7 Unbound is present and exposed, then follow Red Hat guidance. Business urgency rises if affected resolvers are internet-facing or support critical services.
Technical view
CVE-2020-10772 is specific to Red Hat’s RHEL 7 Unbound package unbound-1.6.6-5.el7_8 after erratum RHSA-2020:2414. The incomplete CVE-2020-12662 fix still allowed DNS query amplification, though at a lower ratio than pre-erratum versions. Upstream Unbound is explicitly stated as unaffected.
Likely exposure
Exposure appears limited to Red Hat Enterprise Linux 7 systems running the listed Unbound package version. The bundle does not identify upstream Unbound or other distributions as affected.
Exploitation context
The source bundle marks KEV as false and provides no cited evidence of active exploitation. The vulnerability class is useful for DNS amplification or denial-of-service scenarios, but no exploit status is established here.
Researcher notes
The evidence is narrow: affected package, incomplete Red Hat fix, amplification behavior, and upstream non-impact. No CVSS vector, fixed build, exploit evidence, or operational workaround is included in the supplied bundle.
Mitigation direction
- Check Red Hat Bugzilla and errata for vendor remediation guidance.
- Prioritize vendor-supported package updates for affected RHEL 7 Unbound systems.
- Do not treat upstream Unbound as affected based on this CVE alone.
- Review whether affected resolvers are reachable from untrusted networks.
Validation and detection
- Inventory RHEL 7 hosts running Unbound.
- Confirm whether unbound-1.6.6-5.el7_8 is installed.
- Check whether RHSA-2020:2414 was applied on those hosts.
- Verify resolver exposure to external or untrusted clients.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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
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CWE-406: Exact CWE lookup
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Open ATT&CK lookupCVE-2020-10772 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
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.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://bugzilla.redhat.com/show_bug.cgi?id=1846026CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Insufficient Control of Network Message Volume (Network Amplification)
Insufficient Control of Network Message Volume (Network Amplification) represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.