CVE-2020-14399
published 2020-06-17CVE-2020-14399: An issue was discovered in LibVNCServer before 0.9.13. Byte-aligned data is accessed through uint32_t pointers in libvncclient/rfbproto.c. NOTE: there is…
PriorityP338high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
2.80%
84.7th percentile
An issue was discovered in LibVNCServer before 0.9.13. Byte-aligned data is accessed through uint32_t pointers in libvncclient/rfbproto.c. NOTE: there is reportedly "no trust boundary crossed.
Affected
16 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| debian | debian_linux | — | — |
| debian | debian_linux | — | — |
| debian | libvncserver | < libvncserver 0.9.13+dfsg-1 (bookworm) | libvncserver 0.9.13+dfsg-1 (bookworm) |
| libvncserver_project | libvncserver | < 0.9.13 | 0.9.13 |
| libvncserver_project | libvncserver | >= 0 < 0.9.13+dfsg-1 | 0.9.13+dfsg-1 |
| libvncserver_project | libvncserver | >= 0 < 0.9.13+dfsg-1 | 0.9.13+dfsg-1 |
| libvncserver_project | libvncserver | >= 0 < 0.9.13+dfsg-1 | 0.9.13+dfsg-1 |
| libvncserver_project | libvncserver | >= 0 < 0.9.13+dfsg-1 | 0.9.13+dfsg-1 |
| libvncserver_project | libvncserver | >= 0 < 0.9.10+dfsg-3ubuntu0.16.04.5 | 0.9.10+dfsg-3ubuntu0.16.04.5 |
| libvncserver_project | libvncserver | >= 0 < 0.9.11+dfsg-1ubuntu1.3 | 0.9.11+dfsg-1ubuntu1.3 |
| libvncserver_project | libvncserver | >= 0 < 0.9.12+dfsg-9ubuntu0.2 | 0.9.12+dfsg-9ubuntu0.2 |
| opensuse | leap | — | — |
| opensuse | leap | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
osv7.5HIGH
vendor_debian7.5HIGH
vendor_redhat7.5HIGH
vendor_ubuntu7.5HIGH
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GHSA
GHSA-qc2v-f6rf-7c3g: An issue was discovered in LibVNCServer before 0
ghsa_unreviewed·2022-05-24
CVE-2020-14399 [MEDIUM] GHSA-qc2v-f6rf-7c3g: An issue was discovered in LibVNCServer before 0
An issue was discovered in LibVNCServer before 0.9.13. Byte-aligned data is accessed through uint32_t pointers in libvncclient/rfbproto.c.
OSV
libvncserver vulnerabilities
osv·2020-07-23·CVSS 7.5
CVE-2019-20839 [HIGH] libvncserver vulnerabilities
libvncserver vulnerabilities
Ramin Farajpour Cami discovered that LibVNCServer incorrectly handled
certain malformed unix socket names. A remote attacker could exploit this
with a crafted socket name, leading to a denial of service, or possibly
execute arbitrary code. (CVE-2019-20839)
It was discovered that LibVNCServer did not properly access byte-aligned
data. A remote attacker could possibly use this issue to cause
LibVNCServer to crash, resulting in a denial of service. This issue only
affected Ubuntu 18.04 LTS and Ubuntu 16.04 LTS. (CVE-2019-20840)
Christian Beier discovered that LibVNCServer incorrectly handled anonymous
TLS connections. A remote attacker could possibly use this issue to cause
LibVNCServer to crash, resulting in a denial of service. This issue only
affected Ubuntu
OSV
CVE-2020-14399: An issue was discovered in LibVNCServer before 0
osv·2020-06-17·CVSS 7.5
CVE-2020-14399 [HIGH] CVE-2020-14399: An issue was discovered in LibVNCServer before 0
An issue was discovered in LibVNCServer before 0.9.13. Byte-aligned data is accessed through uint32_t pointers in libvncclient/rfbproto.c. NOTE: there is reportedly "no trust boundary crossed.
Ubuntu
LibVNCServer vulnerabilities
vendor_ubuntu·2020-07-23·CVSS 7.5
CVE-2019-20839 [HIGH] LibVNCServer vulnerabilities
Title: LibVNCServer vulnerabilities
Summary: Several security issues were fixed in LibVNCServer.
Ramin Farajpour Cami discovered that LibVNCServer incorrectly handled
certain malformed unix socket names. A remote attacker could exploit this
with a crafted socket name, leading to a denial of service, or possibly
execute arbitrary code. (CVE-2019-20839)
It was discovered that LibVNCServer did not properly access byte-aligned
data. A remote attacker could possibly use this issue to cause
LibVNCServer to crash, resulting in a denial of service. This issue only
affected Ubuntu 18.04 LTS and Ubuntu 16.04 LTS. (CVE-2019-20840)
Christian Beier discovered that LibVNCServer incorrectly handled anonymous
TLS connections. A remote attacker could possibly use this issue to cause
LibVNCServer to cra
Red Hat
libvncserver: byte-aligned data is accessed through uint32_t pointers in libvncclient/rfbproto.c
vendor_redhat·2020-06-17·CVSS 7.5
CVE-2020-14399 [HIGH] CWE-200 libvncserver: byte-aligned data is accessed through uint32_t pointers in libvncclient/rfbproto.c
libvncserver: byte-aligned data is accessed through uint32_t pointers in libvncclient/rfbproto.c
An issue was discovered in LibVNCServer before 0.9.13. Byte-aligned data is accessed through uint32_t pointers in libvncclient/rfbproto.c. NOTE: there is reportedly "no trust boundary crossed.
Statement: This flaw does not affect versions of vino shipped with Red Hat Enterprise Linux 6, 7, or 8 because vino does not ship the libvncclient. Additionally, Red Hat Product Security does not consider this to be a security vulnerability because no trust boundary is crossed and there is no known path of exploitation. This is a standard software reliability bug.
Package: libvncserver (Red Hat Enterprise Linux 6) - Not affected
Package: vino (Red Hat Enterprise Linux 6) - Not affected
Package: libvn
Debian
CVE-2020-14399: libvncserver - An issue was discovered in LibVNCServer before 0.9.13. Byte-aligned data is acce...
vendor_debian·2020·CVSS 7.5
CVE-2020-14399 [HIGH] CVE-2020-14399: libvncserver - An issue was discovered in LibVNCServer before 0.9.13. Byte-aligned data is acce...
An issue was discovered in LibVNCServer before 0.9.13. Byte-aligned data is accessed through uint32_t pointers in libvncclient/rfbproto.c. NOTE: there is reportedly "no trust boundary crossed.
Scope: local
bookworm: resolved (fixed in 0.9.13+dfsg-1)
bullseye: resolved (fixed in 0.9.13+dfsg-1)
forky: resolved (fixed in 0.9.13+dfsg-1)
sid: resolved (fixed in 0.9.13+dfsg-1)
trixie: resolved (fixed in 0.9.13+dfsg-1)
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2020-14399 libvncserver: byte-aligned data is accessed through uint32_t pointers in libvncclient/rfbproto.c
bugzilla·2020-07-24·CVSS 7.5
CVE-2020-14399 [HIGH] CVE-2020-14399 libvncserver: byte-aligned data is accessed through uint32_t pointers in libvncclient/rfbproto.c
CVE-2020-14399 libvncserver: byte-aligned data is accessed through uint32_t pointers in libvncclient/rfbproto.c
An issue was discovered in LibVNCServer before 0.9.13. Byte-aligned data is accessed through uint32_t pointers in libvncclient/rfbproto.c.
Upstream commit:
https://github.com/LibVNC/libvncserver/commit/23e5cbe6b090d7f22982aee909a6a618174d3c2d
Discussion:
Created libvncserver tracking bugs for this issue:
Affects: epel-7 [bug 1860355]
Affects: fedora-all [bug 1860356]
---
This bug seems to be much more a reliability issue than a security one.
---
After speaking with upstream, I'm going to set this as not a security issue because there is no known path of exploitation or trust boundary crossing.
---
Statement:
This flaw does not affect versions of vino shipped with Red
Bugzilla
CVE-2020-14399 libvncserver: byte-aligned data is accessed through uint32_t pointers in libvncclient/rfbproto.c [epel-7]
bugzilla·2020-07-24·CVSS 7.5
CVE-2020-14399 [HIGH] CVE-2020-14399 libvncserver: byte-aligned data is accessed through uint32_t pointers in libvncclient/rfbproto.c [epel-7]
CVE-2020-14399 libvncserver: byte-aligned data is accessed through uint32_t pointers in libvncclient/rfbproto.c [epel-7]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of epel-7.
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.
Discussion:
Bugzilla
CVE-2020-14399 libvncserver: byte-aligned data is accessed through uint32_t pointers in libvncclient/rfbproto.c [fedora-all]
bugzilla·2020-07-24·CVSS 7.5
CVE-2020-14399 [HIGH] CVE-2020-14399 libvncserver: byte-aligned data is accessed through uint32_t pointers in libvncclient/rfbproto.c [fedora-all]
CVE-2020-14399 libvncserver: byte-aligned data is accessed through uint32_t pointers in libvncclient/rfbproto.c [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-all.
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:
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00033.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-07/msg00055.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-07/msg00066.htmlhttps://bugzilla.redhat.com/show_bug.cgi?id=1860354https://github.com/LibVNC/libvncserver/commit/23e5cbe6b090d7f22982aee909a6a618174d3c2dhttps://github.com/LibVNC/libvncserver/compare/LibVNCServer-0.9.12...LibVNCServer-0.9.13https://lists.debian.org/debian-lts-announce/2020/06/msg00035.htmlhttps://lists.debian.org/debian-lts-announce/2020/08/msg00045.htmlhttps://usn.ubuntu.com/4434-1/http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00033.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-07/msg00055.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-07/msg00066.htmlhttps://bugzilla.redhat.com/show_bug.cgi?id=1860354https://github.com/LibVNC/libvncserver/commit/23e5cbe6b090d7f22982aee909a6a618174d3c2dhttps://github.com/LibVNC/libvncserver/compare/LibVNCServer-0.9.12...LibVNCServer-0.9.13https://lists.debian.org/debian-lts-announce/2020/06/msg00035.htmlhttps://lists.debian.org/debian-lts-announce/2020/08/msg00045.htmlhttps://usn.ubuntu.com/4434-1/
2020-06-17
Published