2.1 Low
CVSS2
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
4.6 Medium
CVSS3
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
0.001 Low
EPSS
Percentile
44.0%
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.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 18.04 | noarch | xscreensaver | < any | UNKNOWN |
ubuntu | 20.04 | noarch | xscreensaver | < any | UNKNOWN |
ubuntu | 22.04 | noarch | xscreensaver | < any | UNKNOWN |
ubuntu | 16.04 | noarch | xscreensaver | < any | UNKNOWN |
github.com/QubesOS/qubes-issues/issues/6595
github.com/QubesOS/qubes-secpack/blob/master/QSBs/qsb-068-2021.txt
github.com/QubesOS/qubes-xscreensaver/blob/master/0001-Fix-updating-outputs-info.patch
launchpad.net/bugs/cve/CVE-2021-34557
nvd.nist.gov/vuln/detail/CVE-2021-34557
security-tracker.debian.org/tracker/CVE-2021-34557
www.cve.org/CVERecord?id=CVE-2021-34557
www.openwall.com/lists/oss-security/2021/06/05/1
www.openwall.com/lists/oss-security/2021/06/05/2
2.1 Low
CVSS2
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
4.6 Medium
CVSS3
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
0.001 Low
EPSS
Percentile
44.0%