CVE-2017-18922
published 2020-06-30CVE-2017-18922: It was discovered that websockets.c in LibVNCServer prior to 0.9.12 did not properly decode certain WebSocket frames. A malicious attacker could exploit this…
PriorityP353critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
2.26%
81.0th percentile
It was discovered that websockets.c in LibVNCServer prior to 0.9.12 did not properly decode certain WebSocket frames. A malicious attacker could exploit this by sending specially crafted WebSocket frames to a server, causing a heap-based buffer overflow.
Affected
23 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| debian | libvncserver | < libvncserver 0.9.12+dfsg-3 (bookworm) | libvncserver 0.9.12+dfsg-3 (bookworm) |
| fedoraproject | fedora | — | — |
| fedoraproject | fedora | — | — |
| libvncserver_project | libvncserver | < 0.9.12 | 0.9.12 |
| libvncserver_project | libvncserver | >= 0 < 0.9.12+dfsg-3 | 0.9.12+dfsg-3 |
| libvncserver_project | libvncserver | >= 0 < 0.9.12+dfsg-3 | 0.9.12+dfsg-3 |
| libvncserver_project | libvncserver | >= 0 < 0.9.12+dfsg-3 | 0.9.12+dfsg-3 |
| libvncserver_project | libvncserver | >= 0 < 0.9.12+dfsg-3 | 0.9.12+dfsg-3 |
| libvncserver_project | libvncserver | >= 0 < 0.9.10+dfsg-3ubuntu0.16.04.4 | 0.9.10+dfsg-3ubuntu0.16.04.4 |
| libvncserver_project | libvncserver | >= 0 < 0.9.11+dfsg-1ubuntu1.2 | 0.9.11+dfsg-1ubuntu1.2 |
| libvncserver_project | libvncserver | >= 0 < 0.9.12+dfsg-9ubuntu0.1 | 0.9.12+dfsg-9ubuntu0.1 |
| opensuse | leap | — | — |
| opensuse | leap | — | — |
| siemens | simatic_itc1500_firmware | >= 3.0.0.0 < 3.2.1.0 | 3.2.1.0 |
| siemens | simatic_itc1500_pro_firmware | >= 3.0.0.0 < 3.2.1.0 | 3.2.1.0 |
| siemens | simatic_itc1900_firmware | >= 3.0.0.0 < 3.2.1.0 | 3.2.1.0 |
| siemens | simatic_itc1900_pro_firmware | >= 3.0.0.0 < 3.2.1.0 | 3.2.1.0 |
| siemens | simatic_itc2200_firmware | >= 3.0.0.0 < 3.2.1.0 | 3.2.1.0 |
| siemens | simatic_itc2200_pro_firmware | >= 3.0.0.0 < 3.2.1.0 | 3.2.1.0 |
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/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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CISA ICS
Siemens SIMATIC ITC
cisa_ics·2021-12-16·CVSS 9.8
[CRITICAL] Siemens SIMATIC ITC
## Archived Content In an effort to keep CISA.gov current, the archive contains outdated information that may not reflect current policy or programs.
ICS Advisory
##
Siemens SIMATIC ITC
Last RevisedDecember 16, 2021
Alert CodeICSA-21-350-12
## 1. EXECUTIVE SUMMARY
- CVSS v3 9.8
- ATTENTION: Exploitable remotely/low attack complexity
- Vendor: Siemens
- Equipment: SIMATIC ITC Products
- Vulnerabilities: Using Components with Known Vulnerabilities
## 2. RISK EVALUATION
Successful exploitation of these LibVNC vulnerabilities could allow remote code execution, information disclosure, and denial-of-service attacks.
## 3. TECHNICAL DETAILS
## 3.1 AFFECTED PRODUCTS
Siemens reports these vulnerabilities affect the following SIMATIC Industri
Ubuntu
LibVNCServer vulnerabilities
vendor_ubuntu·2020-07-01·CVSS 9.8
CVE-2017-18922 [CRITICAL] LibVNCServer vulnerabilities
Title: LibVNCServer vulnerabilities
Summary: Several security issues were fixed in LibVNCServer.
It was discovered that LibVNCServer incorrectly handled decompressing data. An
attacker could possibly use this issue to cause LibVNCServer to crash,
resulting in a denial of service. (CVE-2019-15680)
It was discovered that an information disclosure vulnerability existed in
LibVNCServer when sending a ServerCutText message. An attacker could possibly
use this issue to expose sensitive information. This issue only affected
Ubuntu 19.10, Ubuntu 18.04 LTS, and Ubuntu 16.04 LTS. (CVE-2019-15681)
It was discovered that LibVNCServer incorrectly handled cursor shape updates.
If a user were tricked in to connecting to a malicious server, an attacker
could possibly use this issue to cause LibVNCServ
Red Hat
libvncserver: websocket decoding buffer overflow
vendor_redhat·2017-02-15·CVSS 9.8
CVE-2017-18922 [CRITICAL] CWE-122 libvncserver: websocket decoding buffer overflow
libvncserver: websocket decoding buffer overflow
It was discovered that websockets.c in LibVNCServer prior to 0.9.12 did not properly decode certain WebSocket frames. A malicious attacker could exploit this by sending specially crafted WebSocket frames to a server, causing a heap-based buffer overflow.
A flaw was found in libvncserver. A heap-based buffer overflow within the websocket decoding functionality is possible, which can lead to exploitation by a malicious attacker to overwrite a function pointer. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Package: libvncserver (Red Hat Enterprise Linux 6) - Not affected
Debian
CVE-2017-18922: libvncserver - It was discovered that websockets.c in LibVNCServer prior to 0.9.12 did not prop...
vendor_debian·2017·CVSS 9.8
CVE-2017-18922 [CRITICAL] CVE-2017-18922: libvncserver - It was discovered that websockets.c in LibVNCServer prior to 0.9.12 did not prop...
It was discovered that websockets.c in LibVNCServer prior to 0.9.12 did not properly decode certain WebSocket frames. A malicious attacker could exploit this by sending specially crafted WebSocket frames to a server, causing a heap-based buffer overflow.
Scope: local
bookworm: resolved (fixed in 0.9.12+dfsg-3)
bullseye: resolved (fixed in 0.9.12+dfsg-3)
forky: resolved (fixed in 0.9.12+dfsg-3)
sid: resolved (fixed in 0.9.12+dfsg-3)
trixie: resolved (fixed in 0.9.12+dfsg-3)
GHSA
GHSA-hq8f-cpqj-qph2: It was discovered that websockets
ghsa_unreviewed·2022-05-24
CVE-2017-18922 [HIGH] CWE-787 GHSA-hq8f-cpqj-qph2: It was discovered that websockets
It was discovered that websockets.c in LibVNCServer prior to 0.9.12 did not properly decode certain WebSocket frames. A malicious attacker could exploit this by sending specially crafted WebSocket frames to a server, causing a heap-based buffer overflow.
OSV
libvncserver vulnerabilities
osv·2020-07-01·CVSS 9.8
CVE-2019-15680 [CRITICAL] libvncserver vulnerabilities
libvncserver vulnerabilities
It was discovered that LibVNCServer incorrectly handled decompressing data. An
attacker could possibly use this issue to cause LibVNCServer to crash,
resulting in a denial of service. (CVE-2019-15680)
It was discovered that an information disclosure vulnerability existed in
LibVNCServer when sending a ServerCutText message. An attacker could possibly
use this issue to expose sensitive information. This issue only affected
Ubuntu 19.10, Ubuntu 18.04 LTS, and Ubuntu 16.04 LTS. (CVE-2019-15681)
It was discovered that LibVNCServer incorrectly handled cursor shape updates.
If a user were tricked in to connecting to a malicious server, an attacker
could possibly use this issue to cause LibVNCServer to crash, resulting in a
denial of service, or possibly execute ar
OSV
CVE-2017-18922: It was discovered that websockets
osv·2020-06-30·CVSS 9.8
CVE-2017-18922 [CRITICAL] CVE-2017-18922: It was discovered that websockets
It was discovered that websockets.c in LibVNCServer prior to 0.9.12 did not properly decode certain WebSocket frames. A malicious attacker could exploit this by sending specially crafted WebSocket frames to a server, causing a heap-based buffer overflow.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2017-18922 libvncserver: websocket decoding buffer overflow
bugzilla·2020-06-30·CVSS 9.8
CVE-2017-18922 [CRITICAL] CVE-2017-18922 libvncserver: websocket decoding buffer overflow
CVE-2017-18922 libvncserver: websocket decoding buffer overflow
libvncserver container a heap-based buffer overflow within the websocket decoding functionality, which can be exploited by a malicious attacker to overwrite a function pointer.
Patch:
https://github.com/LibVNC/libvncserver/commit/aac95a9dcf4bbba87b76c72706c3221a842ca433
Discussion:
Created libvncserver tracking bugs for this issue:
Affects: fedora-all [bug 1852511]
---
This issue has been addressed in the following products:
Red Hat Enterprise Linux 7
Via RHSA-2020:3281 https://access.redhat.com/errata/RHSA-2020:3281
---
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):
https://access.redhat.com/security/cve/cve-2017-18922
---
This issue has been addressed in th
Bugzilla
CVE-2017-18922 libvncserver: websocket decoding buffer overflow [fedora-all]
bugzilla·2020-06-30·CVSS 9.8
CVE-2017-18922 [CRITICAL] CVE-2017-18922 libvncserver: websocket decoding buffer overflow [fedora-all]
CVE-2017-18922 libvncserver: websocket decoding buffer overflow [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: this issue affects multiple supported versions
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00020.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-07/msg00028.htmlhttp://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.htmlhttp://www.openwall.com/lists/oss-security/2020/06/30/3https://bugzilla.redhat.com/show_bug.cgi?id=1852356https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdfhttps://github.com/LibVNC/libvncserver/commit/aac95a9dcf4bbba87b76c72706c3221a842ca433https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4F6FUH4EFK4NAP6GT4TQRTBKWIRCZLIY/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NVP7TJVYJDXDFRHVQ3ENEN3H354QPXEZ/https://usn.ubuntu.com/4407-1/https://www.openwall.com/lists/oss-security/2020/06/30/2http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00020.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-07/msg00028.htmlhttp://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.htmlhttp://www.openwall.com/lists/oss-security/2020/06/30/3https://bugzilla.redhat.com/show_bug.cgi?id=1852356https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdfhttps://github.com/LibVNC/libvncserver/commit/aac95a9dcf4bbba87b76c72706c3221a842ca433https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4F6FUH4EFK4NAP6GT4TQRTBKWIRCZLIY/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NVP7TJVYJDXDFRHVQ3ENEN3H354QPXEZ/https://usn.ubuntu.com/4407-1/https://www.openwall.com/lists/oss-security/2020/06/30/2
2020-06-30
Published