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CVE-2023-6816— Xorg-x11-server: heap buffer overflow in devicefocusevent and procxiquerypointer

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

X.org Server是X.org基金会的一个开放源代码的自由软件。 X.org Server 21.1.11之前版本存在安全漏洞，该漏洞源于仅为设备特定数量的按钮分配空间，如果使用更大的值，则会导致堆溢出。

CVSS 9.8 · Critical EPSS 2.11% · P81
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I. Basic Information for CVE-2023-6816

Vulnerability Information
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Vulnerability Title
Xorg-x11-server: heap buffer overflow in devicefocusevent and procxiquerypointer
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in X.Org server. Both DeviceFocusEvent and the XIQueryPointer reply contain a bit for each logical button currently down. Buttons can be arbitrarily mapped to any value up to 255, but the X.Org Server was only allocating space for the device's particular number of buttons, leading to a heap overflow if a bigger value was used.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
X.org Server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
X.org Server是X.org基金会的一个开放源代码的自由软件。 X.org Server 21.1.11之前版本存在安全漏洞，该漏洞源于仅为设备特定数量的按钮分配空间，如果使用更大的值，则会导致堆溢出。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION 0:1.1.0-25.el6_10.13 ~ * cpe:/o:redhat:rhel_els:6
Red Hat Red Hat Enterprise Linux 7 0:1.20.4-27.el7_9 ~ * cpe:/o:redhat:enterprise_linux:7::workstation
Red Hat Red Hat Enterprise Linux 7 0:1.8.0-31.el7_9 ~ * cpe:/o:redhat:enterprise_linux:7::workstation
Red Hat Red Hat Enterprise Linux 8 0:1.13.1-2.el8_9.7 ~ * cpe:/a:redhat:enterprise_linux:8::appstream
Red Hat Red Hat Enterprise Linux 8 0:1.20.11-22.el8 ~ * cpe:/a:redhat:enterprise_linux:8::crb
Red Hat Red Hat Enterprise Linux 8 0:21.1.3-15.el8 ~ * cpe:/a:redhat:enterprise_linux:8::appstream
Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support 0:1.9.0-15.el8_2.9 ~ * cpe:/a:redhat:rhel_e4s:8.2::appstream
Red Hat Red Hat Enterprise Linux 8.2 Telecommunications Update Service 0:1.9.0-15.el8_2.9 ~ * cpe:/a:redhat:rhel_e4s:8.2::appstream
Red Hat Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions 0:1.9.0-15.el8_2.9 ~ * cpe:/a:redhat:rhel_e4s:8.2::appstream
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:1.11.0-8.el8_4.8 ~ * cpe:/a:redhat:rhel_e4s:8.4::appstream
Red Hat Red Hat Enterprise Linux 8.4 Telecommunications Update Service 0:1.11.0-8.el8_4.8 ~ * cpe:/a:redhat:rhel_e4s:8.4::appstream
Red Hat Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions 0:1.11.0-8.el8_4.8 ~ * cpe:/a:redhat:rhel_e4s:8.4::appstream
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support 0:1.12.0-6.el8_6.9 ~ * cpe:/a:redhat:rhel_eus:8.6::appstream
Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support 0:1.12.0-15.el8_8.7 ~ * cpe:/a:redhat:rhel_eus:8.8::appstream
Red Hat Red Hat Enterprise Linux 9 0:1.13.1-3.el9_3.6 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat Red Hat Enterprise Linux 9 0:1.20.11-24.el9 ~ * cpe:/a:redhat:enterprise_linux:9::crb
Red Hat Red Hat Enterprise Linux 9 0:22.1.9-5.el9 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support 0:1.11.0-22.el9_0.8 ~ * cpe:/a:redhat:rhel_eus:9.0::appstream
Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support 0:1.12.0-14.el9_2.5 ~ * cpe:/a:redhat:rhel_eus:9.2::appstream
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6

II. Public POCs for CVE-2023-6816

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III. Intelligence Information for CVE-2023-6816

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Vendor Advisories for CVE-2023-6816 (17)

Mailing List Discussions for CVE-2023-6816 (5)

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION
Same vendor: Red Hat
Same weakness: CWE-787

V. Comments for CVE-2023-6816

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