CVE-2017-12164

MEDIUM

4.1

CVSS v3

Description

A flaw was discovered in gdm 3.24.1 where gdm greeter was no longer setting the ran_once boolean during autologin. If autologin was enabled for a victim, an attacker could simply select 'login as another user' to unlock their screen.

CWE-592 CWE-665

How to fix

Remediation Available

gdm3Debian

Fixed in:3.26.0-1CVE-2017-12164

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Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorPhysical

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityLow

CVSS:3.0/AV:P/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

Exploit Intelligence

0.39%probability of exploitation in 30 days

32ndpercentile

Low risk: more likely to be exploited than 32% of all known CVEs.

References

Patch2

Related Vulnerabilities

Other CWE-592 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2018-10933	Critical	9.1	92%	-	Fix
CVE-2016-8371	High	7.3	11%	-	-
CVE-2018-14643	Critical	9.8	6.1%	-	-
CVE-2016-8616	Low	3.7	3.5%	-	Fix
CVE-2014-5432	Critical	9.8	2.6%	-	-
CVE-2018-1085	Critical	9.0	2.2%	-	Fix

Common questions

How do I fix CVE-2017-12164?

Upgrade gdm3 on debian 12 to 3.26.0-1 or later.

Is CVE-2017-12164 being actively exploited?

Not that we know of. CVE-2017-12164 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.39% is the estimated probability that it will be exploited in the next 30 days. That is higher than 32% of all scored CVEs.

How severe is CVE-2017-12164?

CVE-2017-12164 has a CVSS v3 base score of 4.1, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2017-12164 affect?

Published advisories record a fix for gdm3 (Debian). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-17.