openEuler 20.03 LTS SP3 update for xorg-x11-server



Risk Low
Patch available YES
Number of vulnerabilities 4
CVE-ID CVE-2021-4008
CVE-2021-4009
CVE-2021-4010
CVE-2021-4011
CWE-ID CWE-787
Exploitation vector Local
Public exploit N/A
Vulnerable software
 openEuler
Operating systems & Components / Operating system

xorg-x11-server-help
Operating systems & Components / Operating system package or component

xorg-x11-server-debugsource
Operating systems & Components / Operating system package or component

xorg-x11-server-devel
Operating systems & Components / Operating system package or component

xorg-x11-server-Xephyr
Operating systems & Components / Operating system package or component

xorg-x11-server-debuginfo
Operating systems & Components / Operating system package or component

xorg-x11-server
Operating systems & Components / Operating system package or component

Vendor openEuler

Security Bulletin

This security bulletin contains information about 4 vulnerabilities.

1) Out-of-bounds write

EUVDB-ID: #VU59045

Risk: Low

CVSSv4.0: 7.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/U:Clear]

CVE-ID: CVE-2021-4008

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error in the SProcRenderCompositeGlyphs() function in the Render extension. A local user can send a specially crafted CompositeGlyphs request, trigger an out-of-bounds write and execute arbitrary code with elevated privileges.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP3

xorg-x11-server-help: before 1.20.8-12

xorg-x11-server-debugsource: before 1.20.8-12

xorg-x11-server-devel: before 1.20.8-12

xorg-x11-server-Xephyr: before 1.20.8-12

xorg-x11-server-debuginfo: before 1.20.8-12

xorg-x11-server: before 1.20.8-12

CPE2.3 External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2022-1949


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Out-of-bounds write

EUVDB-ID: #VU59046

Risk: Low

CVSSv4.0: 7.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/U:Clear]

CVE-ID: CVE-2021-4009

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error in the ProcXFixesCreatePointerBarrier() function in the XFixes extension. A local user can send a specially crafted CreatePointerBarrier request, trigger an out-of-bounds write and execute arbitrary code with elevated privileges.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP3

xorg-x11-server-help: before 1.20.8-12

xorg-x11-server-debugsource: before 1.20.8-12

xorg-x11-server-devel: before 1.20.8-12

xorg-x11-server-Xephyr: before 1.20.8-12

xorg-x11-server-debuginfo: before 1.20.8-12

xorg-x11-server: before 1.20.8-12

CPE2.3 External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2022-1949


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Out-of-bounds write

EUVDB-ID: #VU59047

Risk: Low

CVSSv4.0: 7.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/U:Clear]

CVE-ID: CVE-2021-4010

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error in the SProcScreenSaverSuspend() function in the Screen Saver extension. A local user can send a specially crafted Suspend request, trigger an out-of-bounds write and execute arbitrary code with elevated privileges.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP3

xorg-x11-server-help: before 1.20.8-12

xorg-x11-server-debugsource: before 1.20.8-12

xorg-x11-server-devel: before 1.20.8-12

xorg-x11-server-Xephyr: before 1.20.8-12

xorg-x11-server-debuginfo: before 1.20.8-12

xorg-x11-server: before 1.20.8-12

CPE2.3 External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2022-1949


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Out-of-bounds write

EUVDB-ID: #VU59048

Risk: Low

CVSSv4.0: 7.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/U:Clear]

CVE-ID: CVE-2021-4011

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error in the SwapCreateRegister() function in the Record extension. A local user can send a specially crafted RecordCreateContext and RecordRegisterClients requests, trigger an out-of-bounds write and execute arbitrary code with elevated privileges.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP3

xorg-x11-server-help: before 1.20.8-12

xorg-x11-server-debugsource: before 1.20.8-12

xorg-x11-server-devel: before 1.20.8-12

xorg-x11-server-Xephyr: before 1.20.8-12

xorg-x11-server-debuginfo: before 1.20.8-12

xorg-x11-server: before 1.20.8-12

CPE2.3 External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2022-1949


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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