CVE-2018-21247
published 2020-06-17CVE-2018-21247: An issue was discovered in LibVNCServer before 0.9.13. There is an information leak (of uninitialized memory contents) in the libvncclient/rfbproto.c…
PriorityP337high7.5CVSS 3.1
AVNACLPRNUINSUCHINAN
EPSS
2.36%
81.8th percentile
An issue was discovered in LibVNCServer before 0.9.13. There is an information leak (of uninitialized memory contents) in the libvncclient/rfbproto.c ConnectToRFBRepeater function.
Affected
19 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| debian | debian_linux | — | — |
| debian | debian_linux | — | — |
| debian | libvncserver | < libvncserver 0.9.11+dfsg-1.2 (bookworm) | libvncserver 0.9.11+dfsg-1.2 (bookworm) |
| libvnc_project | libvncserver | <= 0.9.12 | — |
| libvncserver_project | libvncserver | >= 0 < 0.9.11+dfsg-1.2 | 0.9.11+dfsg-1.2 |
| libvncserver_project | libvncserver | >= 0 < 0.9.11+dfsg-1.2 | 0.9.11+dfsg-1.2 |
| libvncserver_project | libvncserver | >= 0 < 0.9.11+dfsg-1.2 | 0.9.11+dfsg-1.2 |
| libvncserver_project | libvncserver | >= 0 < 0.9.11+dfsg-1.2 | 0.9.11+dfsg-1.2 |
| 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
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:P/I:N/A:N
osv7.5HIGH
vendor_debian7.5HIGH
vendor_redhat7.5HIGH
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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## Archived Content In an effort to keep CISA.gov current, the archive contains outdated information that may not reflect current policy or programs.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
Red Hat
libvncserver: uninitialized memory contents are vulnerable to Information Leak
vendor_redhat·2020-06-17·CVSS 7.5
CVE-2018-21247 [HIGH] CWE-200 libvncserver: uninitialized memory contents are vulnerable to Information Leak
libvncserver: uninitialized memory contents are vulnerable to Information Leak
An issue was discovered in LibVNCServer before 0.9.13. There is an information leak (of uninitialized memory contents) in the libvncclient/rfbproto.c ConnectToRFBRepeater function.
Package: libvncserver (Red Hat Enterprise Linux 6) - Not affected
Package: libvncserver (Red Hat Enterprise Linux 7) - Will not fix
Debian
CVE-2018-21247: libvncserver - An issue was discovered in LibVNCServer before 0.9.13. There is an information l...
vendor_debian·2018·CVSS 7.5
CVE-2018-21247 [HIGH] CVE-2018-21247: libvncserver - An issue was discovered in LibVNCServer before 0.9.13. There is an information l...
An issue was discovered in LibVNCServer before 0.9.13. There is an information leak (of uninitialized memory contents) in the libvncclient/rfbproto.c ConnectToRFBRepeater function.
Scope: local
bookworm: resolved (fixed in 0.9.11+dfsg-1.2)
bullseye: resolved (fixed in 0.9.11+dfsg-1.2)
forky: resolved (fixed in 0.9.11+dfsg-1.2)
sid: resolved (fixed in 0.9.11+dfsg-1.2)
trixie: resolved (fixed in 0.9.11+dfsg-1.2)
GHSA
GHSA-355f-mpqr-3mwv: An issue was discovered in LibVNCServer before 0
ghsa_unreviewed·2022-05-24
CVE-2018-21247 [MEDIUM] CWE-200 GHSA-355f-mpqr-3mwv: An issue was discovered in LibVNCServer before 0
An issue was discovered in LibVNCServer before 0.9.13. There is a memory leak in the libvncclient/rfbproto.c ConnectToRFBRepeater function.
OSV
CVE-2018-21247: An issue was discovered in LibVNCServer before 0
osv·2020-06-17·CVSS 7.5
CVE-2018-21247 [HIGH] CVE-2018-21247: An issue was discovered in LibVNCServer before 0
An issue was discovered in LibVNCServer before 0.9.13. There is an information leak (of uninitialized memory contents) in the libvncclient/rfbproto.c ConnectToRFBRepeater function.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2018-21247 libvncserver: uninitialized memory contents are vulnerable to Information Leak [fedora-all]
bugzilla·2020-06-23·CVSS 7.5
CVE-2018-21247 [HIGH] CVE-2018-21247 libvncserver: uninitialized memory contents are vulnerable to Information Leak [fedora-all]
CVE-2018-21247 libvncserver: uninitialized memory contents are vulnerable to Information Leak [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 affect
Bugzilla
CVE-2018-21247 libvncserver: uninitialized memory contents are vulnerable to Information Leak
bugzilla·2020-06-23·CVSS 7.5
CVE-2018-21247 [HIGH] CVE-2018-21247 libvncserver: uninitialized memory contents are vulnerable to Information Leak
CVE-2018-21247 libvncserver: uninitialized memory contents are vulnerable to Information Leak
An issue was discovered in LibVNCServer before 0.9.13. There is an information leak (of uninitialized memory contents) in the libvncclient/rfbproto.c ConnectToRFBRepeater function.
Upstream Issue:
https://github.com/LibVNC/libvncserver/issues/253
Discussion:
Created libvncserver tracking bugs for this issue:
Affects: epel-7 [bug 1849888]
Affects: fedora-all [bug 1849887]
---
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-2018-21247
---
This issue has been addressed in the following products:
Red Hat Enterprise Linux 8
Via RHSA-2021:1811 https://access.redhat.com/errata/RHSA-2021:1811
Bugzilla
CVE-2018-21247 libvncserver: uninitialized memory contents are vulnerable to Information Leak [epel-7]
bugzilla·2020-06-23·CVSS 7.5
CVE-2018-21247 [HIGH] CVE-2018-21247 libvncserver: uninitialized memory contents are vulnerable to Information Leak [epel-7]
CVE-2018-21247 libvncserver: uninitialized memory contents are vulnerable to Information Leak [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:
Use the following
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://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdfhttps://github.com/LibVNC/libvncserver/compare/LibVNCServer-0.9.12...LibVNCServer-0.9.13https://github.com/LibVNC/libvncserver/issues/253https://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/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://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdfhttps://github.com/LibVNC/libvncserver/compare/LibVNCServer-0.9.12...LibVNCServer-0.9.13https://github.com/LibVNC/libvncserver/issues/253https://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/
2020-06-17
Published