CVE-2017-9108 [High] | Memory Corruption in Adns

An issue was discovered in adns before 1.5.2. adnshost mishandles a missing final newline on a stdin read. It is wrong to increment used as well as setting r, since used is incremented according to r, later. Rather one should be doing what read() would have done. Without this fix, adnshost may read and process one byte beyond the buffer, perhaps crashing or perhaps somehow leaking the value of that byte.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.56%	2.19%	+1.62%
2	2026-04-22	0.53%	0.56%	+0.04%
3	2025-11-21	—	0.53%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.56%

2.19%

+1.62%

2026-04-22

0.53%

0.56%

+0.04%

2025-11-21

—

0.53%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
7.5	3.1	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	3.9	3.6	[email protected]
5.0	2.0	MEDIUM	`AV:N/AC:L/Au:N/C:N/I:N/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:N) No confidentiality impact. Integrity impact (I:N) No integrity impact. Availability impact (A:P) Partial availability impact.	10.0	2.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

7.5

3.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

3.9

3.6

[email protected]

5.0

2.0

MEDIUM

AV:N/AC:L/Au:N/C:N/I:N/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:N): No confidentiality impact.
Integrity impact (I:N): No integrity impact.
Availability impact (A:P): Partial availability impact.

10.0

2.9

[email protected]

OS Trackers for CVE-2017-9108

vendor	priority	summary	link
`debian`	unimportant	CVE-2017-9108 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-2017-9108
`suse`	high	CVE-2017-9108 severity important: SUSE including 23 source package names (24.164:libadns1-1.4-103.3.1, 26.196:libadns1-1.4-103.3.1, …), 65 product×package rows across 53 product lines (Container caasp/v4/nginx-ingress-controller, Container suse/ltss/sle12.5/sles12sp5, … (53 product lines)): Fixed 65.	https://www.suse.com/security/cve/CVE-2017-9108/
`ubuntu`	medium	CVE-2017-9108 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-2017-9108

Affected software / configurations for CVE-2017-9108

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-2017-9108

URL	Tags
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-2017-9108

Exploit prediction scoring system (EPSS) score for CVE-2017-9108

Common vulnerability scoring system (CVSS) metrics for CVE-2017-9108

Weakness enumeration for CVE-2017-9108

OS Trackers for CVE-2017-9108

Affected software / configurations for CVE-2017-9108

References for CVE-2017-9108