Gentoo Websites Logo
Go to: Gentoo Home Documentation Forums Lists Bugs Planet Store Wiki Get Gentoo!
Bug 756841 (CVE-2020-29074) - <x11-misc/x11vnc-0.9.16-r4: Insecure permissions on shm (CVE-2020-29074)
Summary: <x11-misc/x11vnc-0.9.16-r4: Insecure permissions on shm (CVE-2020-29074)
Status: RESOLVED FIXED
Alias: CVE-2020-29074
Product: Gentoo Security
Classification: Unclassified
Component: Vulnerabilities (show other bugs)
Hardware: All Linux
: Normal minor (vote)
Assignee: Gentoo Security
URL: https://github.com/LibVNC/x11vnc/comm...
Whiteboard: B3 [noglsa cve]
Keywords:
Depends on:
Blocks:
 
Reported: 2020-11-26 16:39 UTC by Sam James
Modified: 2021-05-24 13:59 UTC (History)
2 users (show)

See Also:
Package list:
x11-misc/x11vnc-0.9.16-r4
Runtime testing required: ---
nattka: sanity-check+

Attachments
Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.
Description Sam James archtester Gentoo Infrastructure gentoo-dev Security 2020-11-26 16:39:45 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."

Patch linked.
Comment 1 Sam James archtester Gentoo Infrastructure gentoo-dev Security 2020-11-26 16:40:19 UTC 
Please apply the linked patch. Thanks!
Comment 2 Larry the Git Cow gentoo-dev 2020-12-07 07:36:34 UTC 
The bug has been referenced in the following commit(s):

https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=10d026e0af2445f2a4b6f922486795ede8ef4907

commit 10d026e0af2445f2a4b6f922486795ede8ef4907
Author:     Alexander Tsoy <alexander@tsoy.me>
AuthorDate: 2020-11-27 16:50:50 +0000
Commit:     Joonas Niilola <juippis@gentoo.org>
CommitDate: 2020-12-07 07:34:45 +0000

    x11-misc/x11vnc: security bump for CVE-2020-29074
    
    Bug: https://bugs.gentoo.org/756841
    Signed-off-by: Alexander Tsoy <alexander@tsoy.me>
    Closes: https://github.com/gentoo/gentoo/pull/18432
    Signed-off-by: Joonas Niilola <juippis@gentoo.org>

 .../files/x11vnc-0.9.16-CVE-2020-29074.patch       | 25 +++++++
 x11-misc/x11vnc/x11vnc-0.9.16-r4.ebuild            | 81 ++++++++++++++++++++++
 2 files changed, 106 insertions(+)
Comment 3 John Helmert III archtester Gentoo Infrastructure gentoo-dev Security 2020-12-07 07:43:00 UTC 
Please let us know when ready to stable.
Comment 4 Alexander Tsoy 2020-12-07 16:13:48 UTC 
Please go ahead.
Comment 5 Rolf Eike Beer archtester 2020-12-10 19:26:29 UTC 
sparc stable
Comment 6 Thomas Deutschmann (RETIRED) gentoo-dev 2020-12-10 21:42:36 UTC 
x86 stable
Comment 7 Sam James archtester Gentoo Infrastructure gentoo-dev Security 2020-12-11 22:10:09 UTC 
arm done
Comment 8 Sergei Trofimovich (RETIRED) gentoo-dev 2020-12-11 23:24:07 UTC 
ppc/ppc64 stable
Comment 9 Sam James archtester Gentoo Infrastructure gentoo-dev Security 2020-12-15 10:35:29 UTC 
amd64 done
Comment 10 Sergei Trofimovich (RETIRED) gentoo-dev 2020-12-23 22:48:26 UTC 
hppa stable

Last arch. Closing.
Comment 11 Sam James archtester Gentoo Infrastructure gentoo-dev Security 2020-12-23 22:49:24 UTC 
Please cleanup, thanks!
Comment 12 Larry the Git Cow gentoo-dev 2020-12-26 20:54:44 UTC 
The bug has been referenced in the following commit(s):

https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=247076038706da75eea7ecc2ba423b87cd0eead0

commit 247076038706da75eea7ecc2ba423b87cd0eead0
Author:     Alexander Tsoy <alexander@tsoy.me>
AuthorDate: 2020-12-23 22:53:30 +0000
Commit:     Andreas Sturmlechner <asturm@gentoo.org>
CommitDate: 2020-12-26 20:54:19 +0000

    x11-misc/x11vnc: security cleanup
    
    Bug: https://bugs.gentoo.org/756841
    Signed-off-by: Alexander Tsoy <alexander@tsoy.me>
    Closes: https://github.com/gentoo/gentoo/pull/18797
    Signed-off-by: Andreas Sturmlechner <asturm@gentoo.org>

 x11-misc/x11vnc/x11vnc-0.9.16-r2.ebuild | 75 -------------------------------
 x11-misc/x11vnc/x11vnc-0.9.16-r3.ebuild | 80 ---------------------------------
 2 files changed, 155 deletions(-)
Comment 13 Sam James archtester Gentoo Infrastructure gentoo-dev Security 2020-12-26 21:00:27 UTC 
Thanks!
Comment 14 Thomas Deutschmann (RETIRED) gentoo-dev 2021-05-24 13:59:43 UTC 
GLSA Vote: No

Repository is clean, all done!