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Vulnerability Details :

CVE-2021-34557

Summary
Assigner-mitre
Assigner Org ID-8254265b-2729-46b6-b9e3-3dfca2d5bfca
Published At-10 Jun, 2021 | 15:54
Updated At-04 Aug, 2024 | 00:12
Rejected At-
Credits

XScreenSaver 5.45 can be bypassed if the machine has more than ten disconnectable video outputs. A buffer overflow in update_screen_layout() allows an attacker to bypass the standard screen lock authentication mechanism by crashing XScreenSaver. The attacker must physically disconnect many video outputs.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:mitre
Assigner Org ID:8254265b-2729-46b6-b9e3-3dfca2d5bfca
Published At:10 Jun, 2021 | 15:54
Updated At:04 Aug, 2024 | 00:12
Rejected At:
▼CVE Numbering Authority (CNA)

XScreenSaver 5.45 can be bypassed if the machine has more than ten disconnectable video outputs. A buffer overflow in update_screen_layout() allows an attacker to bypass the standard screen lock authentication mechanism by crashing XScreenSaver. The attacker must physically disconnect many video outputs.

Affected Products
Vendor
n/a
Product
n/a
Versions
Affected
  • n/a
Problem Types
TypeCWE IDDescription
textN/An/a
Type: text
CWE ID: N/A
Description: n/a
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/QubesOS/qubes-issues/issues/6595
x_refsource_MISC
https://www.openwall.com/lists/oss-security/2021/06/05/1
x_refsource_MISC
https://github.com/QubesOS/qubes-secpack/blob/master/QSBs/qsb-068-2021.txt
x_refsource_MISC
https://github.com/QubesOS/qubes-xscreensaver/blob/master/0001-Fix-updating-outputs-info.patch
x_refsource_MISC
http://www.openwall.com/lists/oss-security/2021/06/11/1
mailing-list
x_refsource_MLIST
http://www.openwall.com/lists/oss-security/2021/07/06/2
mailing-list
x_refsource_MLIST
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TC4QB7TRS4GS7LDXQQ4PC6J3LVFJYISV/
vendor-advisory
x_refsource_FEDORA
Hyperlink: https://github.com/QubesOS/qubes-issues/issues/6595
Resource:
x_refsource_MISC
Hyperlink: https://www.openwall.com/lists/oss-security/2021/06/05/1
Resource:
x_refsource_MISC
Hyperlink: https://github.com/QubesOS/qubes-secpack/blob/master/QSBs/qsb-068-2021.txt
Resource:
x_refsource_MISC
Hyperlink: https://github.com/QubesOS/qubes-xscreensaver/blob/master/0001-Fix-updating-outputs-info.patch
Resource:
x_refsource_MISC
Hyperlink: http://www.openwall.com/lists/oss-security/2021/06/11/1
Resource:
mailing-list
x_refsource_MLIST
Hyperlink: http://www.openwall.com/lists/oss-security/2021/07/06/2
Resource:
mailing-list
x_refsource_MLIST
Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TC4QB7TRS4GS7LDXQQ4PC6J3LVFJYISV/
Resource:
vendor-advisory
x_refsource_FEDORA
▼Authorized Data Publishers (ADP)
CVE Program Container
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/QubesOS/qubes-issues/issues/6595
x_refsource_MISC
x_transferred
https://www.openwall.com/lists/oss-security/2021/06/05/1
x_refsource_MISC
x_transferred
https://github.com/QubesOS/qubes-secpack/blob/master/QSBs/qsb-068-2021.txt
x_refsource_MISC
x_transferred
https://github.com/QubesOS/qubes-xscreensaver/blob/master/0001-Fix-updating-outputs-info.patch
x_refsource_MISC
x_transferred
http://www.openwall.com/lists/oss-security/2021/06/11/1
mailing-list
x_refsource_MLIST
x_transferred
http://www.openwall.com/lists/oss-security/2021/07/06/2
mailing-list
x_refsource_MLIST
x_transferred
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TC4QB7TRS4GS7LDXQQ4PC6J3LVFJYISV/
vendor-advisory
x_refsource_FEDORA
x_transferred
Hyperlink: https://github.com/QubesOS/qubes-issues/issues/6595
Resource:
x_refsource_MISC
x_transferred
Hyperlink: https://www.openwall.com/lists/oss-security/2021/06/05/1
Resource:
x_refsource_MISC
x_transferred
Hyperlink: https://github.com/QubesOS/qubes-secpack/blob/master/QSBs/qsb-068-2021.txt
Resource:
x_refsource_MISC
x_transferred
Hyperlink: https://github.com/QubesOS/qubes-xscreensaver/blob/master/0001-Fix-updating-outputs-info.patch
Resource:
x_refsource_MISC
x_transferred
Hyperlink: http://www.openwall.com/lists/oss-security/2021/06/11/1
Resource:
mailing-list
x_refsource_MLIST
x_transferred
Hyperlink: http://www.openwall.com/lists/oss-security/2021/07/06/2
Resource:
mailing-list
x_refsource_MLIST
x_transferred
Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TC4QB7TRS4GS7LDXQQ4PC6J3LVFJYISV/
Resource:
vendor-advisory
x_refsource_FEDORA
x_transferred
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:cve@mitre.org
Published At:10 Jun, 2021 | 16:15
Updated At:07 Nov, 2023 | 03:36

XScreenSaver 5.45 can be bypassed if the machine has more than ten disconnectable video outputs. A buffer overflow in update_screen_layout() allows an attacker to bypass the standard screen lock authentication mechanism by crashing XScreenSaver. The attacker must physically disconnect many video outputs.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Primary3.14.6MEDIUM
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Primary2.02.1LOW
AV:L/AC:L/Au:N/C:N/I:N/A:P
Type: Primary
Version: 3.1
Base score: 4.6
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Type: Primary
Version: 2.0
Base score: 2.1
Base severity: LOW
Vector:
AV:L/AC:L/Au:N/C:N/I:N/A:P
CPE Matches
xscreensaver_project
xscreensaver_project
>>xscreensaver>>5.45
cpe:2.3:a:xscreensaver_project:xscreensaver:5.45:*:*:*:*:*:*:*
Fedora Project
fedoraproject
>>fedora>>33
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-120Primarynvd@nist.gov
CWE ID: CWE-120
Type: Primary
Source: nvd@nist.gov
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
http://www.openwall.com/lists/oss-security/2021/06/11/1cve@mitre.org
Mailing List
Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/07/06/2cve@mitre.org
Exploit
Mailing List
Third Party Advisory
https://github.com/QubesOS/qubes-issues/issues/6595cve@mitre.org
Issue Tracking
Third Party Advisory
https://github.com/QubesOS/qubes-secpack/blob/master/QSBs/qsb-068-2021.txtcve@mitre.org
Exploit
Third Party Advisory
https://github.com/QubesOS/qubes-xscreensaver/blob/master/0001-Fix-updating-outputs-info.patchcve@mitre.org
Patch
Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TC4QB7TRS4GS7LDXQQ4PC6J3LVFJYISV/cve@mitre.org
N/A
https://www.openwall.com/lists/oss-security/2021/06/05/1cve@mitre.org
Exploit
Mailing List
Third Party Advisory
Hyperlink: http://www.openwall.com/lists/oss-security/2021/06/11/1
Source: cve@mitre.org
Resource:
Mailing List
Third Party Advisory
Hyperlink: http://www.openwall.com/lists/oss-security/2021/07/06/2
Source: cve@mitre.org
Resource:
Exploit
Mailing List
Third Party Advisory
Hyperlink: https://github.com/QubesOS/qubes-issues/issues/6595
Source: cve@mitre.org
Resource:
Issue Tracking
Third Party Advisory
Hyperlink: https://github.com/QubesOS/qubes-secpack/blob/master/QSBs/qsb-068-2021.txt
Source: cve@mitre.org
Resource:
Exploit
Third Party Advisory
Hyperlink: https://github.com/QubesOS/qubes-xscreensaver/blob/master/0001-Fix-updating-outputs-info.patch
Source: cve@mitre.org
Resource:
Patch
Third Party Advisory
Hyperlink: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TC4QB7TRS4GS7LDXQQ4PC6J3LVFJYISV/
Source: cve@mitre.org
Resource: N/A
Hyperlink: https://www.openwall.com/lists/oss-security/2021/06/05/1
Source: cve@mitre.org
Resource:
Exploit
Mailing List
Third Party Advisory

Change History

0
Information is not available yet

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