Bug 1933602 (CVE-2020-29074) - CVE-2020-29074 x11vnc: insecure permissions on shm
Summary: CVE-2020-29074 x11vnc: insecure permissions on shm
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2020-29074
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1933603 1933604
Blocks:
TreeView+ depends on / blocked
 
Reported: 2021-03-01 08:51 UTC by msiddiqu
Modified: 2021-03-01 13:02 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2021-03-01 13:02:08 UTC
Embargoed:

Attachments (Terms of Use)

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.
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