Bug 1933602 (CVE-2020-29074)

Summary: CVE-2020-29074 x11vnc: insecure permissions on shm
Product: [Other] Security Response Reporter: msiddiqu
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED UPSTREAM QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: pahan, ppisar
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Last Closed: 2021-03-01 13:02:08 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 1933603, 1933604    
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Description msiddiqu 2021-03-01 08:51:17 UTC
scan.c in x11vnc 0.9.16 uses IPC_CREAT|0777 in shmget calls, which allows access by actors other than the current user.

References:


https://github.com/LibVNC/x11vnc/commit/69eeb9f7baa14ca03b16c9de821f9876def7a36a
https://lists.debian.org/debian-lts-announce/2020/12/msg00018.html
https://www.debian.org/security/2020/dsa-4799

Comment 1 msiddiqu 2021-03-01 08:52:45 UTC
Created x11vnc tracking bugs for this issue:

Affects: epel-all [bug 1933604]
Affects: fedora-all [bug 1933603]

Comment 2 Product Security DevOps Team 2021-03-01 13:02:08 UTC
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.