CVE-2017-9109: n/a vulnerability

CVE-2017-9109: An issue was discovered in adns before 1.5.2.

An issue was discovered in adns before 1.5.2. It fails to ignore apparent answers before the first RR that was found the first time. when this is fixed, the second answer scan finds the same RRs at the first. Otherwise, adns can be confused by interleaving answers for the CNAME target, with the CNAME itself. In that case the answer data structure (on the heap) can be overrun. With this fixed, it prefers to look only at the answer RRs which come after the CNAME, which is at least arguably correct.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 5, 2024, 16:55 UTC (UTC+00:00)

Security readout for executives and security teams

adns versions before 1.5.2 can mishandle certain DNS answers involving CNAME records. The bug can overrun heap data, creating a memory-corruption risk. The provided sources do not give a CVSS score, impact rating, or evidence of active exploitation. Exposure is limited to systems or applications using adns before 1.5.2. Fedora and openSUSE advisories indicate distribution packages were affected, but the bundle does not identify broader product integrations. Treat as a targeted dependency remediation item, not an emergency, unless vulnerable adns is present in critical exposed services. Lack of severity and exploit evidence lowers urgency, but heap overrun bugs should not be ignored. Mitigation focus: Inventory systems and applications using adns packages or linked adns libraries.; Upgrade adns to 1.5.2 or a vendor-fixed distribution package.; Prioritize internet-facing services that perform DNS lookups through vulnerable adns..

Prepared: Jun 3, 2026, 11:19 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Jun 18, 2020, 13:02 UTC (UTC+00:00)

Official CVE source material

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.

0CVSS vectors

0Timeline events

0ADP providers

4Source links

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://www.chiark.greenend.org.uk/pipermail/adns-announce/2020/000004.htmlCVE reference · x_refsource_CONFIRM
FEDORA-2020-530188bf36CVE reference · vendor-advisory, x_refsource_FEDORA
FEDORA-2020-e59bcaf702CVE reference · vendor-advisory, x_refsource_FEDORA

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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