Ubuntu.comUB:CVE-2021-31523CVE-2021-31523
7.2 High
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
0.0004 Low
EPSS
Percentile
5.1%
The Debian xscreensaver 5.42+dfsg1-1 package for XScreenSaver has
cap_net_raw enabled for the /usr/libexec/xscreensaver/sonar file, which
allows local users to gain privileges because this is arguably incompatible
with the design of the Mesa 3D Graphics library dependency.
Bugs
| 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 | 23.10 | noarch | xscreensaver | < any | UNKNOWN |
| ubuntu | 24.04 | noarch | xscreensaver | < any | UNKNOWN |
| ubuntu | 16.04 | noarch | xscreensaver | < any | UNKNOWN |
References
www.openwall.com/lists/oss-security/2021/04/21/3
bugs.chromium.org/p/project-zero/issues/detail?id=2174
launchpad.net/bugs/cve/CVE-2021-31523
nvd.nist.gov/vuln/detail/CVE-2021-31523
security-tracker.debian.org/tracker/CVE-2021-31523
www.cve.org/CVERecord?id=CVE-2021-31523
www.openwall.com/lists/oss-security/2021/04/17/1
Related
7.2 High
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
0.0004 Low
EPSS
Percentile
5.1%