CVE-2016-9942
published 2016-12-31CVE-2016-9942: Heap-based buffer overflow in ultra.c in LibVNCClient in LibVNCServer before 0.9.11 allows remote servers to cause a denial of service (application crash) or…
PriorityP347critical9.8CVSS 3.0
AVNACLPRNUINSUCHIHAH
EPSS
3.75%
88.5th percentile
Heap-based buffer overflow in ultra.c in LibVNCClient in LibVNCServer before 0.9.11 allows remote servers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted FramebufferUpdate message with the Ultra type tile, such that the LZO payload decompressed length exceeds what is specified by the tile dimensions.
Affected
9 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | libvncserver | < libvncserver 0.9.11+dfsg-1 (bookworm) | libvncserver 0.9.11+dfsg-1 (bookworm) |
| debian | veyon | < libvncserver 0.9.11+dfsg-1 (bookworm) | libvncserver 0.9.11+dfsg-1 (bookworm) |
| libvncserver_project | libvncserver | — | — |
| libvncserver_project | libvncserver | >= 0 < 0.9.11+dfsg-1 | 0.9.11+dfsg-1 |
| libvncserver_project | libvncserver | >= 0 < 0.9.11+dfsg-1 | 0.9.11+dfsg-1 |
| libvncserver_project | libvncserver | >= 0 < 0.9.11+dfsg-1 | 0.9.11+dfsg-1 |
| libvncserver_project | libvncserver | >= 0 < 0.9.11+dfsg-1 | 0.9.11+dfsg-1 |
| libvncserver_project | libvncserver | >= 0 < 0.9.9+dfsg-1ubuntu1.2 | 0.9.9+dfsg-1ubuntu1.2 |
| libvncserver_project | libvncserver | >= 0 < 0.9.10+dfsg-3ubuntu0.16.04.1 | 0.9.10+dfsg-3ubuntu0.16.04.1 |
CVSS provenance
nvdv3.09.8CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv2.07.5HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
osv9.8CRITICAL
vendor_debian9.8CRITICAL
vendor_redhat9.8CRITICAL
vendor_ubuntu9.8CRITICAL
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GHSA
GHSA-wx7p-737c-9wqw: Heap-based buffer overflow in ultra
ghsa_unreviewed·2022-05-13
CVE-2016-9942 [CRITICAL] CWE-119 GHSA-wx7p-737c-9wqw: Heap-based buffer overflow in ultra
Heap-based buffer overflow in ultra.c in LibVNCClient in LibVNCServer before 0.9.11 allows remote servers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted FramebufferUpdate message with the Ultra type tile, such that the LZO payload decompressed length exceeds what is specified by the tile dimensions.
OSV
italc vulnerabilities
osv·2020-10-20·CVSS 7.5
CVE-2014-6051 [HIGH] italc vulnerabilities
italc vulnerabilities
Nicolas Ruff discovered that iTALC had buffer overflows, divide-by-zero errors
and didn't check malloc return values. A remote attacker could use these issues
to cause a denial of service or possibly execute arbitrary code.
(CVE-2014-6051, CVE-2014-6052, CVE-2014-6053, CVE-2014-6054, CVE-2014-6055)
Josef Gajdusek discovered that iTALC had heap-based buffer overflow
vulnerabilities. A remote attacker could used these issues to cause a denial of
service or possibly execute arbitrary code. (CVE-2016-9941, CVE-2016-9942)
It was discovered that iTALC had an out-of-bounds write, multiple heap
out-of-bounds writes, an infinite loop, improper initializations, and null
pointer vulnerabilities. A remote attacker could used these issues to cause a
denial of service or possibl
OSV
libvncserver vulnerabilities
osv·2017-01-11·CVSS 9.8
CVE-2016-9941 [CRITICAL] libvncserver vulnerabilities
libvncserver vulnerabilities
Josef Gajdusek discovered that the LibVNCServer client library incorrectly
handled certain FrameBufferUpdate messages. If a user were tricked into
connecting to a malicious server, an attacker could use this issue to cause
a denial of service, or possibly execute arbitrary code. (CVE-2016-9941,
CVE-2016-9942)
OSV
CVE-2016-9942: Heap-based buffer overflow in ultra
osv·2016-12-31·CVSS 9.8
CVE-2016-9942 [CRITICAL] CVE-2016-9942: Heap-based buffer overflow in ultra
Heap-based buffer overflow in ultra.c in LibVNCClient in LibVNCServer before 0.9.11 allows remote servers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted FramebufferUpdate message with the Ultra type tile, such that the LZO payload decompressed length exceeds what is specified by the tile dimensions.
Ubuntu
iTALC vulnerabilities
vendor_ubuntu·2020-10-20·CVSS 7.5
CVE-2018-20749 [HIGH] iTALC vulnerabilities
Title: iTALC vulnerabilities
Summary: Several security issues were fixed in iTALC.
Nicolas Ruff discovered that iTALC had buffer overflows, divide-by-zero errors
and didn't check malloc return values. A remote attacker could use these issues
to cause a denial of service or possibly execute arbitrary code.
(CVE-2014-6051, CVE-2014-6052, CVE-2014-6053, CVE-2014-6054, CVE-2014-6055)
Josef Gajdusek discovered that iTALC had heap-based buffer overflow
vulnerabilities. A remote attacker could used these issues to cause a denial of
service or possibly execute arbitrary code. (CVE-2016-9941, CVE-2016-9942)
It was discovered that iTALC had an out-of-bounds write, multiple heap
out-of-bounds writes, an infinite loop, improper initializations, and null
pointer vulnerabilities. A remote attacker c
Ubuntu
LibVNCServer vulnerabilities
vendor_ubuntu·2017-01-11·CVSS 9.8
CVE-2016-9941 [CRITICAL] LibVNCServer vulnerabilities
Title: LibVNCServer vulnerabilities
Summary: Several security issues were fixed in LibVNCServer.
Josef Gajdusek discovered that the LibVNCServer client library incorrectly
handled certain FrameBufferUpdate messages. If a user were tricked into
connecting to a malicious server, an attacker could use this issue to cause
a denial of service, or possibly execute arbitrary code. (CVE-2016-9941,
CVE-2016-9942)
Instructions: In general, a standard system update will make all the necessary changes.
Red Hat
libvncserver: Heap-based buffer overflow in ultra.c
vendor_redhat·2016-11-14·CVSS 9.8
CVE-2016-9942 [CRITICAL] CWE-122 libvncserver: Heap-based buffer overflow in ultra.c
libvncserver: Heap-based buffer overflow in ultra.c
Heap-based buffer overflow in ultra.c in LibVNCClient in LibVNCServer before 0.9.11 allows remote servers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted FramebufferUpdate message with the Ultra type tile, such that the LZO payload decompressed length exceeds what is specified by the tile dimensions.
Package: libvncserver (Red Hat Enterprise Linux 6) - Will not fix
Package: libvncserver (Red Hat Enterprise Linux 7) - Will not fix
Debian
CVE-2016-9942: libvncserver - Heap-based buffer overflow in ultra.c in LibVNCClient in LibVNCServer before 0.9...
vendor_debian·2016·CVSS 9.8
CVE-2016-9942 [CRITICAL] CVE-2016-9942: libvncserver - Heap-based buffer overflow in ultra.c in LibVNCClient in LibVNCServer before 0.9...
Heap-based buffer overflow in ultra.c in LibVNCClient in LibVNCServer before 0.9.11 allows remote servers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted FramebufferUpdate message with the Ultra type tile, such that the LZO payload decompressed length exceeds what is specified by the tile dimensions.
Scope: local
bookworm: resolved (fixed in 0.9.11+dfsg-1)
bullseye: resolved (fixed in 0.9.11+dfsg-1)
forky: resolved (fixed in 0.9.11+dfsg-1)
sid: resolved (fixed in 0.9.11+dfsg-1)
trixie: resolved (fixed in 0.9.11+dfsg-1)
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2016-9942 libvncserver: Heap-based buffer overflow in ultra.c
bugzilla·2017-01-04·CVSS 9.8
CVE-2016-9942 [CRITICAL] CVE-2016-9942 libvncserver: Heap-based buffer overflow in ultra.c
CVE-2016-9942 libvncserver: Heap-based buffer overflow in ultra.c
Heap-based buffer overflow was found in ultra.c in LibVNCClient in LibVNCServer before 0.9.11 that allows remote servers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted FramebufferUpdate message with the Ultra type tile, such that the LZO payload decompressed length exceeds what is specified by the tile dimensions.
Upstream patch:
https://github.com/LibVNC/libvncserver/commit/5fff4353f66427b467eb29e5fdc1da4f2be028bb
Upstream bug:
https://github.com/LibVNC/libvncserver/pull/137
Discussion:
Created libvncserver tracking bugs for this issue:
Affects: fedora-all [bug 1410178]
Affects: epel-5 [bug 1410179]
Affects: epel-7 [bug 1410180]
---
libvncserver-0.9.11-2.fc24.1 ha
Bugzilla
CVE-2016-9941 CVE-2016-9942 libvncserver: various flaws
bugzilla·2017-01-04·CVSS 9.8
CVE-2016-9941 [CRITICAL] CVE-2016-9941 CVE-2016-9942 libvncserver: various flaws
CVE-2016-9941 CVE-2016-9942 libvncserver: various flaws
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of Fedora EPEL.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
[bug automatically created by: add-tracking-bugs]
Discussion:
Use the f
Bugzilla
CVE-2016-9941 CVE-2016-9942 libvncserver: various flaws [fedora-all]
bugzilla·2017-01-04·CVSS 9.8
CVE-2016-9941 [CRITICAL] CVE-2016-9941 CVE-2016-9942 libvncserver: various flaws [fedora-all]
CVE-2016-9941 CVE-2016-9942 libvncserver: various flaws [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of Fedora.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple supported versions of Fedora. W
Bugzilla
CVE-2016-9941 CVE-2016-9942 libvncserver: various flaws [epel-5]
bugzilla·2017-01-04·CVSS 9.8
CVE-2016-9941 [CRITICAL] CVE-2016-9941 CVE-2016-9942 libvncserver: various flaws [epel-5]
CVE-2016-9941 CVE-2016-9942 libvncserver: various flaws [epel-5]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of Fedora EPEL.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
[bug automatically created by: add-tracking-bugs]
Discussion:
http://www.debian.org/security/2017/dsa-3753http://www.securityfocus.com/bid/95170https://github.com/LibVNC/libvncserver/pull/137https://github.com/LibVNC/libvncserver/releases/tag/LibVNCServer-0.9.11https://lists.debian.org/debian-lts-announce/2019/10/msg00042.htmlhttps://security.gentoo.org/glsa/201702-24https://usn.ubuntu.com/4587-1/http://www.debian.org/security/2017/dsa-3753http://www.securityfocus.com/bid/95170https://github.com/LibVNC/libvncserver/pull/137https://github.com/LibVNC/libvncserver/releases/tag/LibVNCServer-0.9.11https://lists.debian.org/debian-lts-announce/2019/10/msg00042.htmlhttps://security.gentoo.org/glsa/201702-24https://usn.ubuntu.com/4587-1/
2016-12-31
Published