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alpinelinuxAlpine Linux Development TeamALPINE:CVE-2021-34557
HistoryJun 10, 2021 - 4:15 p.m.

CVE-2021-34557

2021-06-1016:15:08
Alpine Linux Development Team
security.alpinelinux.org
23
xscreensaver
bypass
buffer overflow
update_screen_layout
authentication
video outputs
security vulnerability

CVSS2

2.1

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:L/AC:L/Au:N/C:N/I:N/A:P

CVSS3

4.6

Attack Vector

PHYSICAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

AI Score

5

Confidence

High

EPSS

0.001

Percentile

44.0%

JSON

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.

Related

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cvelist 1
openvas
openvas
openSUSE: Security Advisory for xscreensaver (SUSE-SU-2022:2641-1)
2022-08-04 00:00:00
SUSE: Security Advisory (SUSE-SU-2022:2641-1)
2022-08-04 00:00:00
SUSE: Security Advisory (SUSE-SU-2022:2642-1)
2022-08-04 00:00:00
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2021-06-10 00:00:00
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2021-06-10 16:15:08
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SUSE SLES12 Security Update : xscreensaver (SUSE-SU-2022:2642-1)
2022-08-04 00:00:00
SUSE SLED15 / SLES15 Security Update : xscreensaver (SUSE-SU-2022:2641-1)
2022-08-04 00:00:00
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2021-06-12 00:00:00
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fedora
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[SECURITY] Fedora 33 Update: xscreensaver-5.45-2.fc33
2021-08-19 01:11:08
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Updated xscreensaver packages fix security vulnerability
2021-06-23 20:11:28
suse
suse
Security update for xscreensaver (moderate)
2022-08-03 00:00:00
cvelist
cvelist
CVE-2021-34557
2021-06-10 15:54:35

CVSS2

2.1

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:L/AC:L/Au:N/C:N/I:N/A:P

CVSS3

4.6

Attack Vector

PHYSICAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

AI Score

5

Confidence

High

EPSS

0.001

Percentile

44.0%

JSON
Related for ALPINE:CVE-2021-34557
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