OESA-2021-1468

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OESA-2021-1468

Summary: xorg-x11-server security update

Details: Xorg server common files. Security Fix(es): A security issue has been found in X.Org before version 21.1.2 and Xwayland before version 21.1.4. The handler for the CompositeGlyphs request of the Render extension does not properly validate the request length leading to out of bounds memory write. This can lead to local privileges elevation on systems where the X server is running privileged and remote code execution for SSH X forwarding sessions.(CVE-2021-4008) A security issue has been found in X.Org before version 21.1.2 and Xwayland before version 21.1.4. The handler for the CreatePointerBarrier request of the XFixes extension does not properly validate the request length leading to out of bounds memory write. This can lead to local privileges elevation on systems where the X server is running privileged and remote code execution for SSH X forwarding sessions.(CVE-2021-4009) A security issue has been found in X.Org before version 21.1.2 and Xwayland before version 21.1.4. The handler for the Suspend request of the Screen Saver extension does not properly validate the request length leading to an out of bounds memory write. This can lead to local privileges elevation on systems where the X server is running privileged and remote code execution for SSH X forwarding sessions.(CVE-2021-4010) A security issue has been found in X.Org before version 21.1.2 and Xwayland before version 21.1.4. The handlers for the RecordCreateContext and RecordRegisterClients requests of the Record extension do not properly validate the request length leading to an out of bounds memory write. This can lead to local privileges elevation on systems where the X server is running privileged and remote code execution for SSH X forwarding sessions.(CVE-2021-4011)

References: https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2021-1468, https://nvd.nist.gov/vuln/detail/CVE-2021-4008, https://nvd.nist.gov/vuln/detail/CVE-2021-4009, https://nvd.nist.gov/vuln/detail/CVE-2021-4010, https://nvd.nist.gov/vuln/detail/CVE-2021-4011