CVE-2017-3140 [Low] | Denial of Service in Bind

CVE-2017-3140 is rated Moderate Risk (53.8/100): CVSS Low severity, with high exploitation likelihood (EPSS 34.36%, 97th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +14.84% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-04	19.52%	34.36%	+14.84%
2	2025-12-17	20.10%	19.52%	-0.58%
3	2025-11-01	—	20.10%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-04

19.52%

34.36%

+14.84%

2025-12-17

20.10%

19.52%

-0.58%

2025-11-01

—

20.10%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
3.7	3.0	LOW	`CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L` 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:H) Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work. 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:L) Might cause slowdowns, glitches, or partial disruption—not a full brick.	2.2	1.4	[email protected]
5.9	3.0	MEDIUM	`CVSS:3.0/AV:N/AC:H/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:H) Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work. 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.	2.2	3.6	[email protected]
4.3	2.0	MEDIUM	`AV:N/AC:M/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:M) Exploitation needs some favorable conditions, but not exceptional ones. 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.	8.6	2.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

3.7

3.0

LOW

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L 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:H): Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
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:L): Might cause slowdowns, glitches, or partial disruption—not a full brick.

2.2

1.4

[email protected]

5.9

3.0

MEDIUM

CVSS:3.0/AV:N/AC:H/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:H): Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
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.

2.2

3.6

[email protected]

4.3

2.0

MEDIUM

AV:N/AC:M/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:M): Exploitation needs some favorable conditions, but not exceptional ones.
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.

8.6

2.9

[email protected]

OS Trackers for CVE-2017-3140

vendor	priority	summary	link
`debian`	unimportant	CVE-2017-3140 unimportant priority: Debian including 1 source packages (bind9), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5.	https://security-tracker.debian.org/tracker/CVE-2017-3140
`gentoo`	normal	CVE-2017-3140: 1 GLSA(s) (201708-01), 1 atom(s) (net-dns/bind); latest impact normal.	https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2017-3140
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2017-3140
`suse`	medium	CVE-2017-3140 severity moderate: SUSE including 143 source package names (bind, bind-9.11.2-10.4, …), 506 product×package rows across 69 product lines (SLES for SAP Applications 11 SP2, SUSE CaaS Platform 4.0, … (69 product lines)): Known Not Affected 377, Fixed 129.	https://www.suse.com/security/cve/CVE-2017-3140/
`ubuntu`	medium	CVE-2017-3140 medium priority: Ubuntu including 1 source packages (bind9), 5 status rows across 5 suites (trusty, upstream, xenial, yakkety, zesty): not-affected 4, needs-triage 1.	https://ubuntu.com/security/CVE-2017-3140

Affected software / configurations for CVE-2017-3140

Vendor	Product	Version	Raw CPE
isc	bind	>= 9.11.0, <= 9.11.1	cpe:2.3:a:isc:bind::::::::
isc	bind	9.9.10	cpe:2.3:a:isc:bind:9.9.10:::::::*
isc	bind	9.9.10	cpe:2.3:a:isc:bind:9.9.10:s1::::::
isc	bind	9.10.5	cpe:2.3:a:isc:bind:9.10.5:::::::*
isc	bind	9.10.5	cpe:2.3:a:isc:bind:9.10.5:s1::::::
netapp	data_ontap_edge	—	cpe:2.3:a:netapp:data_ontap_edge:-:::::::*
netapp	element_software	—	cpe:2.3:a:netapp:element_software:-:::::::*
netapp	oncommand_balance	—	cpe:2.3:a:netapp:oncommand_balance:-:::::::*

References for CVE-2017-3140

URL	Tags
http://www.securityfocus.com/bid/99088	Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1038692	Third Party Advisory VDB Entry
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03772en_us	Third Party Advisory
https://kb.isc.org/docs/aa-01495	Vendor Advisory
https://security.gentoo.org/glsa/201708-01	Third Party Advisory
https://security.netapp.com/advisory/ntap-20180926-0001/	Third Party Advisory

URL

CVE-2017-3140 | An error processing RPZ rules can cause named to loop endlessly after handling a query

Exploit prediction scoring system (EPSS) score for CVE-2017-3140

Common vulnerability scoring system (CVSS) metrics for CVE-2017-3140

Weakness enumeration for CVE-2017-3140

OS Trackers for CVE-2017-3140

Affected software / configurations for CVE-2017-3140

References for CVE-2017-3140