Ubuntu.comUB:CVE-2023-5574CVE-2023-5574
7 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
7 High
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
16.1%
A use-after-free flaw was found in xorg-x11-server-Xvfb. This issue occurs
in Xvfb with a very specific and legacy configuration (a multi-screen setup
with multiple protocol screens, also known as Zaphod mode). If the pointer
is warped from a screen 1 to a screen 0, a use-after-free issue may be
triggered during shutdown or reset of the Xvfb server, allowing for
possible escalation of privileges or denial of service.
Notes
| Author | Note |
|---|---|
| Priority reason: Only affects legacy multiscreen setups with Zaphod | |
| mdeslaur | xorg server is actually the xorg-server package the xorg package only contains docs xwayland package contains parts of xorg-server issue does not affected xwayland This is ZDI-CAN-21213 Due to last minute regressions, the final patches have not yet been released for this issue. This issue only affects Xvfb and requires a legacy multi-screen setup with multiple protocol screens (“Zaphod”). |
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 18.04 | noarch | xorg | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | xorg | < any | UNKNOWN |
| ubuntu | 22.04 | noarch | xorg | < any | UNKNOWN |
| ubuntu | 23.10 | noarch | xorg | < any | UNKNOWN |
| ubuntu | 24.04 | noarch | xorg | < any | UNKNOWN |
| ubuntu | 16.04 | noarch | xorg | < any | UNKNOWN |
| ubuntu | 18.04 | noarch | xorg-server | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | xorg-server | < any | UNKNOWN |
| ubuntu | 22.04 | noarch | xorg-server | < any | UNKNOWN |
| ubuntu | 23.10 | noarch | xorg-server | < any | UNKNOWN |
Related
7 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
7 High
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
16.1%