CVE-2016-6866 : slock allows attackers to bypass the screen lock via vectors involving an invali

slock allows attackers to bypass the screen lock via vectors involving an invalid password hash, which triggers a NULL pointer dereference and crash.

Published 2017-02-15 19:59:00

Updated 2017-02-17 17:43:38

Source MITRE

View at NVD, CVE.org

Vulnerability category: Memory Corruption

Products affected by CVE-2016-6866

Fedoraproject » Fedora » Version: 24
cpe:2.3:o:fedoraproject:fedora:24:*:*:*:*:*:*:*
Matching versions
Fedoraproject » Fedora » Version: 25
cpe:2.3:o:fedoraproject:fedora:25:*:*:*:*:*:*:*
Matching versions
Suckless » Slock
Versions up to, including, (<=) 1.3
cpe:2.3:a:suckless:slock:*:*:*:*:*:*:*:*
Matching versions

EPSS FAQ

0.81%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 79 %

Percentile, the proportion of vulnerabilities that are scored at or less

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:N/I:N/A:P	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
7.5	HIGH	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	3.9	3.6	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

Assigned by: nvd@nist.gov (Primary)

http://www.openwall.com/lists/oss-security/2016/08/18/24

oss-security - Re: CVE request - slock, all versions NULL pointer dereference
Mailing List;Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RZPEJQNVODYSI4WQXM5GQKXRO7TPK2VG/

[SECURITY] Fedora 24 Update: slock-1.3-2.fc24 - package-announce - Fedora Mailing-Lists
Third Party Advisory
http://www.securityfocus.com/bid/92546

slock CVE-2016-6866 NULL Pointer Dereference Denial of Service Vulnerability
Third Party Advisory;VDB Entry
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2FYPV6QQPPYBL3Z2BYNYEJB67FSC55OR/

[SECURITY] Fedora 25 Update: slock-1.3-2.fc25 - package-announce - Fedora Mailing-Lists
Third Party Advisory
http://s1m0n.dft-labs.eu/files/slock/slock.txt

Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/08/18/22

oss-security - CVE request - slock, all versions NULL pointer dereference
Mailing List;Third Party Advisory
http://git.suckless.org/slock/commit/?id=d8bec0f6fdc8a246d78cb488a0068954b46fcb29

fix CVE-2016-6866 - slock - simple X display locker utility
Patch;Vendor Advisory

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