How severe is CVE-2017-9105?

CVE-2017-9105 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2017-9105 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-9105?

CVE-2017-9105 primarily affects Gnu Adns. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-9105?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2017-9105 published?

CVE-2017-9105 was published on 2020-06-18 and last updated on 2026-06-17.

CVE-2017-9105

CVE-2017-9105 is a high-severity vulnerability in Gnu Adns with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-476.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 7.5
EPSS exploit prediction: 4% (88th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Gnu Adns
Published: 2020-06-18
Last modified: 2026-06-17

Description

An issue was discovered in adns before 1.5.2. It corrupts a pointer when a nameserver speaks first because of a wrong number of pointer dereferences. This bug may well be exploitable as a remote code execution.

Frequently asked questions

What is CVE-2017-9105?: An issue was discovered in adns before 1.5.2. It corrupts a pointer when a nameserver speaks first because of a wrong number of pointer dereferences. This bug may well be exploitable as a remote code execution.
How severe is CVE-2017-9105?: CVE-2017-9105 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2017-9105 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-9105?: CVE-2017-9105 primarily affects Gnu Adns. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-9105?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2017-9105 published?: CVE-2017-9105 was published on 2020-06-18 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:gnu:adns:*:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*

More vulnerabilities in Gnu Adns

CVE-2017-9104 — Critical (CVSS 9.8): An issue was discovered in adns before 1.5.2. It hangs, eating CPU, if a compression pointer loop is encountered.
CVE-2017-9103 — Critical (CVSS 9.8): An issue was discovered in adns before 1.5.2. pap_mailbox822 does not properly check st from adns__findlabel_next.…
CVE-2017-9109 — Critical (CVSS 9.8): An issue was discovered in adns before 1.5.2. It fails to ignore apparent answers before the first RR that was found…
CVE-2017-9108 — High (CVSS 7.5): An issue was discovered in adns before 1.5.2. adnshost mishandles a missing final newline on a stdin read. It is wrong…
CVE-2017-9107 — High (CVSS 7.5): An issue was discovered in adns before 1.5.2. It overruns reading a buffer if a domain ends with backslash. If the…
CVE-2017-9106 — High (CVSS 7.5): An issue was discovered in adns before 1.5.2. adns_rr_info mishandles a bogus *datap. The general pattern for…

All CVEs affecting Gnu Adns →

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Browse all CWE-476 (NULL Pointer Dereference) vulnerabilities →