CVE-2017-9104 [Critical] | Denial of Service in Adns

CVE-2017-9104 is rated High Risk (65.9/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 0.89%). High exploitation likelihood—assess exposure and prioritize remediation.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-04-23	0.67%	0.89%	+0.22%
2	2025-11-21	0.89%	0.67%	-0.22%
3	2025-11-18	—	0.89%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-04-23

0.67%

0.89%

+0.22%

2025-11-21

0.89%

0.67%

-0.22%

2025-11-18

—

0.89%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
9.8	3.1	CRITICAL	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	3.9	5.9	[email protected]
7.5	2.0	HIGH	`AV:N/AC:L/Au:N/C:P/I:P/A:P` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:L) Exploitation conditions are straightforward and predictable. Authentication (AU:N) No authentication is required. Confidentiality impact (C:P) Partial confidentiality impact. Integrity impact (I:P) Partial integrity impact. Availability impact (A:P) Partial availability impact.	10.0	6.4	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

9.8

3.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

3.9

5.9

[email protected]

7.5

2.0

HIGH

AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand

Access vector (AV:N): Can be exploited remotely over network reachability.
Access complexity (AC:L): Exploitation conditions are straightforward and predictable.
Authentication (AU:N): No authentication is required.
Confidentiality impact (C:P): Partial confidentiality impact.
Integrity impact (I:P): Partial integrity impact.
Availability impact (A:P): Partial availability impact.

10.0

6.4

[email protected]

OS Trackers for CVE-2017-9104

vendor	priority	summary	link
`debian`	unimportant	CVE-2017-9104 unimportant priority: Debian including 1 source packages (adns), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5.	https://security-tracker.debian.org/tracker/CVE-2017-9104
`suse`	high	CVE-2017-9104 severity important: SUSE including 18 source package names (24.164:libadns1-1.4-103.3.1, 26.196:libadns1-1.4-103.3.1, …), 60 product×package rows across 52 product lines (Container caasp/v4/nginx-ingress-controller, Container suse/ltss/sle12.5/sles12sp5, … (52 product lines)): Fixed 60.	https://www.suse.com/security/cve/CVE-2017-9104/
`ubuntu`	medium	CVE-2017-9104 medium priority: Ubuntu including 1 source packages (adns), 17 status rows across 17 suites (bionic, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 11, needed 3, DNE 1, ignored 1, needs-triage 1.	https://ubuntu.com/security/CVE-2017-9104

Affected software / configurations for CVE-2017-9104

Vendor	Product	Version	Raw CPE
gnu	adns	< 1.5.2	cpe:2.3:a:gnu:adns::::::::
opensuse	leap	15.1	cpe:2.3:o:opensuse:leap:15.1:::::::*
fedoraproject	fedora	31	cpe:2.3:o:fedoraproject:fedora:31:::::::*
fedoraproject	fedora	32	cpe:2.3:o:fedoraproject:fedora:32:::::::*

References for CVE-2017-9104

URL	Tags
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00037.html	Mailing List Third Party Advisory
http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=adns.git	Third Party Advisory
http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=adns.git%3Ba=blob%3Bf=changelog
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TRVHN3GGVNQWAOL3PWC5FLAV7HUESLZR/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UGFZ4SPV6KFQK6ZNUZFB5Y32OYFOM5YJ/
https://www.chiark.greenend.org.uk/pipermail/adns-announce/2020/000004.html	Release Notes Third Party Advisory

URL

CVE-2017-9104

Exploit prediction scoring system (EPSS) score for CVE-2017-9104

Common vulnerability scoring system (CVSS) metrics for CVE-2017-9104

Weakness enumeration for CVE-2017-9104

OS Trackers for CVE-2017-9104

Affected software / configurations for CVE-2017-9104

References for CVE-2017-9104