CVE-2020-14396
published 2020-06-17CVE-2020-14396: An issue was discovered in LibVNCServer before 0.9.13. libvncclient/tls_openssl.c has a NULL pointer dereference.
PriorityP336high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
2.57%
83.3th percentile
An issue was discovered in LibVNCServer before 0.9.13. libvncclient/tls_openssl.c has a NULL pointer dereference.
Affected
22 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| 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) |
| libvnc_project | libvncserver | <= 0.9.12 | — |
| 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 |
| 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: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
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
GHSA
GHSA-f7mr-g388-r763: An issue was discovered in LibVNCServer before 0
ghsa_unreviewed·2022-05-24
CVE-2020-14396 [MEDIUM] CWE-476 GHSA-f7mr-g388-r763: An issue was discovered in LibVNCServer before 0
An issue was discovered in LibVNCServer before 0.9.13. libvncclient/tls_openssl.c has a NULL pointer dereference.
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-2020-14396: An issue was discovered in LibVNCServer before 0
osv·2020-06-17·CVSS 7.5
CVE-2020-14396 [HIGH] CVE-2020-14396: An issue was discovered in LibVNCServer before 0
An issue was discovered in LibVNCServer before 0.9.13. libvncclient/tls_openssl.c has a NULL pointer dereference.
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·2020-07-23·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: libvncclient/tls_openssl.c has a NULL pointer dereference
vendor_redhat·2020-06-17·CVSS 7.5
CVE-2020-14396 [HIGH] CWE-476 libvncserver: libvncclient/tls_openssl.c has a NULL pointer dereference
libvncserver: libvncclient/tls_openssl.c has a NULL pointer dereference
An issue was discovered in LibVNCServer before 0.9.13. libvncclient/tls_openssl.c has a NULL pointer dereference.
Statement: versions of libvncserver and vino that ship with Red Hat Enterprise Linux 6 through 8 (inclusive) are not affected because the vulnerable code was introduced in a later version.
Package: libvncserver (Red Hat Enterprise Linux 6) - Not affected
Package: vino (Red Hat Enterprise Linux 6) - Not affected
Package: libvncserver (Red Hat Enterprise Linux 7) - Not affected
Package: vino (Red Hat Enterprise Linux 7) - Not affected
Package: libvncserver (Red Hat Enterprise Linux 8) - Not affected
Package: vino (Red Hat Enterprise Linux 8) - Not affected
Debian
CVE-2020-14396: libvncserver - An issue was discovered in LibVNCServer before 0.9.13. libvncclient/tls_openssl....
vendor_debian·2020·CVSS 7.5
CVE-2020-14396 [HIGH] CVE-2020-14396: libvncserver - An issue was discovered in LibVNCServer before 0.9.13. libvncclient/tls_openssl....
An issue was discovered in LibVNCServer before 0.9.13. libvncclient/tls_openssl.c has a NULL pointer dereference.
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-2020-14396 libvncserver: libvncclient/tls_openssl.c has a NULL pointer dereference
bugzilla·2020-07-24·CVSS 7.5
CVE-2020-14396 [HIGH] CVE-2020-14396 libvncserver: libvncclient/tls_openssl.c has a NULL pointer dereference
CVE-2020-14396 libvncserver: libvncclient/tls_openssl.c has a NULL pointer dereference
An issue was discovered in LibVNCServer before 0.9.13. libvncclient/tls_openssl.c has a NULL pointer dereference.
Upstream commit:
https://github.com/LibVNC/libvncserver/commit/33441d90a506d5f3ae9388f2752901227e430553
Discussion:
Created libvncserver tracking bugs for this issue:
Affects: epel-7 [bug 1860341]
Affects: fedora-all [bug 1860342]
---
Statement:
versions of libvncserver and vino that ship with Red Hat Enterprise Linux 6 through 8 (inclusive) are not affected because the vulnerable code was introduced in a later version.
---
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-2020-14396
--
Bugzilla
CVE-2020-14396 libvncserver: libvncclient/tls_openssl.c has a NULL pointer dereference [fedora-all]
bugzilla·2020-07-24·CVSS 7.5
CVE-2020-14396 [HIGH] CVE-2020-14396 libvncserver: libvncclient/tls_openssl.c has a NULL pointer dereference [fedora-all]
CVE-2020-14396 libvncserver: libvncclient/tls_openssl.c has a NULL pointer dereference [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 multi
Bugzilla
CVE-2020-14396 libvncserver: libvncclient/tls_openssl.c has a NULL pointer dereference [epel-7]
bugzilla·2020-07-24·CVSS 7.5
CVE-2020-14396 [HIGH] CVE-2020-14396 libvncserver: libvncclient/tls_openssl.c has a NULL pointer dereference [epel-7]
CVE-2020-14396 libvncserver: libvncclient/tls_openssl.c has a NULL pointer dereference [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 templat
https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdfhttps://github.com/LibVNC/libvncserver/commit/33441d90a506d5f3ae9388f2752901227e430553https://github.com/LibVNC/libvncserver/compare/LibVNCServer-0.9.12...LibVNCServer-0.9.13https://usn.ubuntu.com/4434-1/https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdfhttps://github.com/LibVNC/libvncserver/commit/33441d90a506d5f3ae9388f2752901227e430553https://github.com/LibVNC/libvncserver/compare/LibVNCServer-0.9.12...LibVNCServer-0.9.13https://usn.ubuntu.com/4434-1/
2020-06-17
Published