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DebianDEBIAN:DSA-4799-1:59912

HistoryNov 28, 2020 - 2:00 p.m.

[SECURITY] [DSA 4799-1] x11vnc security update

2020-11-2814:00:35

lists.debian.org

6.5 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:S/C:P/I:P/A:P

8.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

8.5 High

AI Score

Confidence

High

0.013 Low

EPSS

Percentile

85.9%

JSON

Debian Security Advisory DSA-4799-1 [email protected]
https://www.debian.org/security/ Salvatore Bonaccorso
November 28, 2020 https://www.debian.org/security/faq

Package : x11vnc
CVE ID : CVE-2020-29074
Debian Bug : 975875

Guenal Davalan reported a flaw in x11vnc, a VNC server to allow remote
access to an existing X session. x11vnc creates shared memory segments
with 0777 mode. A local attacker can take advantage of this flaw for
information disclosure, denial of service or interfering with the VNC
session of another user on the host.

For the stable distribution (buster), this problem has been fixed in
version 0.9.13-6+deb10u1.

We recommend that you upgrade your x11vnc packages.

For the detailed security status of x11vnc please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/x11vnc

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: [email protected]

OSVersionArchitecturePackageVersionFilename
Debian10mips64elx11vnc-dbgsym< 0.9.13-6+deb10u1x11vnc-dbgsym_0.9.13-6+deb10u1_mips64el.deb
Debian10mipselx11vnc-dbgsym< 0.9.13-6+deb10u1x11vnc-dbgsym_0.9.13-6+deb10u1_mipsel.deb
Debian10arm64x11vnc-dbgsym< 0.9.13-6+deb10u1x11vnc-dbgsym_0.9.13-6+deb10u1_arm64.deb
Debian9i386x11vnc< 0.9.13-2+deb9u2x11vnc_0.9.13-2+deb9u2_i386.deb
Debian9allx11vnc-data< 0.9.13-2+deb9u2x11vnc-data_0.9.13-2+deb9u2_all.deb
Debian10armelx11vnc-dbgsym< 0.9.13-6+deb10u1x11vnc-dbgsym_0.9.13-6+deb10u1_armel.deb
Debian10armhfx11vnc-dbgsym< 0.9.13-6+deb10u1x11vnc-dbgsym_0.9.13-6+deb10u1_armhf.deb
Debian10armelx11vnc< 0.9.13-6+deb10u1x11vnc_0.9.13-6+deb10u1_armel.deb
Debian9allx11vnc< 0.9.13-2+deb9u2x11vnc_0.9.13-2+deb9u2_all.deb
Debian10allx11vnc< 0.9.13-6+deb10u1x11vnc_0.9.13-6+deb10u1_all.deb

OS	Version	Architecture	Package	Version	Filename
Debian	10	mips64el	x11vnc-dbgsym	< 0.9.13-6+deb10u1	x11vnc-dbgsym_0.9.13-6+deb10u1_mips64el.deb
Debian	10	mipsel	x11vnc-dbgsym	< 0.9.13-6+deb10u1	x11vnc-dbgsym_0.9.13-6+deb10u1_mipsel.deb
Debian	10	arm64	x11vnc-dbgsym	< 0.9.13-6+deb10u1	x11vnc-dbgsym_0.9.13-6+deb10u1_arm64.deb
Debian	9	i386	x11vnc	< 0.9.13-2+deb9u2	x11vnc_0.9.13-2+deb9u2_i386.deb
Debian	9	all	x11vnc-data	< 0.9.13-2+deb9u2	x11vnc-data_0.9.13-2+deb9u2_all.deb
Debian	10	armel	x11vnc-dbgsym	< 0.9.13-6+deb10u1	x11vnc-dbgsym_0.9.13-6+deb10u1_armel.deb
Debian	10	armhf	x11vnc-dbgsym	< 0.9.13-6+deb10u1	x11vnc-dbgsym_0.9.13-6+deb10u1_armhf.deb
Debian	10	armel	x11vnc	< 0.9.13-6+deb10u1	x11vnc_0.9.13-6+deb10u1_armel.deb
Debian	9	all	x11vnc	< 0.9.13-2+deb9u2	x11vnc_0.9.13-2+deb9u2_all.deb
Debian	10	all	x11vnc	< 0.9.13-6+deb10u1	x11vnc_0.9.13-6+deb10u1_all.deb