CVE-2016-4414 [High] | Denial of Service in Leap

CVE-2016-4414 is rated Moderate Risk (58.7/100): CVSS High severity, with medium exploitation likelihood (EPSS 2.90%). Review affected assets and schedule remediation.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2025-03-30	3.98%	2.90%	-1.08%
2	2025-03-29	2.90%	3.98%	+1.08%
3	2025-03-17	—	2.90%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2025-03-30

3.98%

2.90%

-1.08%

2025-03-29

2.90%

3.98%

+1.08%

2025-03-17

—

2.90%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
7.5	3.0	HIGH	`CVSS:3.0/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

3.0

HIGH

CVSS:3.0/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-2016-4414

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2016-4414 not yet assigned priority: Debian including 1 source packages (quassel), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5.	https://security-tracker.debian.org/tracker/CVE-2016-4414
`suse`	low	CVE-2016-4414 severity low: SUSE including 5 source package names (quassel-base-0.12.4-3.3, quassel-client-0.12.4-3.3, quassel-client-qt5-0.12.4-3.3, quassel-core-0.12.4-3.3, quassel-mono-0.12.4-3.3), 5 product×package rows across 1 product lines (openSUSE Tumbleweed): Fixed 5.	https://www.suse.com/security/cve/CVE-2016-4414/
`ubuntu`	low	CVE-2016-4414 low priority: Ubuntu including 1 source packages (quassel), 24 status rows across 24 suites (artful, bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, precise, questing, trusty, upstream, wily, xenial, yakkety, zesty): not-affected 18, ignored 3, DNE 1, needed 1, released 1.	https://ubuntu.com/security/CVE-2016-4414

Affected software / configurations for CVE-2016-4414

Vendor	Product	Version	Raw CPE
opensuse	leap	42.1	cpe:2.3:o:opensuse:leap:42.1:::::::*
opensuse	opensuse	13.2	cpe:2.3:o:opensuse:opensuse:13.2:::::::*
quassel-irc	quassel	<= 0.12.3	cpe:2.3:a:quassel-irc:quassel::::::::
fedoraproject	fedora	22	cpe:2.3:o:fedoraproject:fedora:22:::::::*
fedoraproject	fedora	23	cpe:2.3:o:fedoraproject:fedora:23:::::::*
fedoraproject	fedora	24	cpe:2.3:o:fedoraproject:fedora:24:::::::*

References for CVE-2016-4414

URL	Tags
http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183571.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183585.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183746.html
http://lists.opensuse.org/opensuse-updates/2016-05/msg00063.html
http://quassel-irc.org/node/129
http://www.openwall.com/lists/oss-security/2016/04/30/2
http://www.openwall.com/lists/oss-security/2016/04/30/4
https://github.com/quassel/quassel/commit/e678873	Vendor Advisory

URL

CVE-2016-4414

Exploit prediction scoring system (EPSS) score for CVE-2016-4414

Common vulnerability scoring system (CVSS) metrics for CVE-2016-4414

Weakness enumeration for CVE-2016-4414

OS Trackers for CVE-2016-4414

NVD evaluator notes for CVE-2016-4414

Affected software / configurations for CVE-2016-4414

References for CVE-2016-4414