According to the versions of the libX11 packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - LookupCol.c in X.Org X through X11R7.7 and libX11 before 1.7.1 might allow remote attackers to execute     arbitrary code. The libX11 XLookupColor request (intended for server-side color lookup) contains a flaw     allowing a client to send color-name requests with a name longer than the maximum size allowed by the     protocol (and also longer than the maximum packet size for normal-sized packets). The user-controlled data     exceeding the maximum size is then interpreted by the server as additional X protocol requests and     executed, e.g., to disable X server authorization completely. For example, if the victim encounters     malicious terminal control sequences for color codes, then the attacker may be able to take full control     of the running graphical session. (CVE-2021-31535)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

EulerOS Virtualization 3.0.2.6 : libX11 (EulerOS-SA-2021-2905)

critical Nessus Plugin ID 156528

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