Critical severity · published Jun 30, 2020
CVE-2017-18922
It was discovered that websockets.c in LibVNCServer prior to 0.9.12 did not properly decode certain WebSocket frames
9.8
CVSS
2.3%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.3% · higher than 83% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FE
Fedora · Fedoraproject
31; 32 · source: NVD
LE
Leap · Opensuse
15.1; 15.2 · source: NVD
LI
Libvncserver · Libvncserver Project
before 0.9.12 · source: NVD
SI
Simatic Itc1500 Firmware · Siemens
3.0.0.0 before 3.2.1.0 · source: NVD
SI
Simatic Itc1500 Pro Firmware · Siemens
3.0.0.0 before 3.2.1.0 · source: NVD
SI
Simatic Itc1900 Firmware · Siemens
3.0.0.0 before 3.2.1.0 · source: NVD
SI
Simatic Itc1900 Pro Firmware · Siemens
3.0.0.0 before 3.2.1.0 · source: NVD
SI
Simatic Itc2200 Firmware · Siemens
3.0.0.0 before 3.2.1.0 · source: NVD
SI
Simatic Itc2200 Pro Firmware · Siemens
3.0.0.0 before 3.2.1.0 · source: NVD
UL
Ubuntu Linux · Canonical
16.04; 18.04; 19.10; 20.04 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-18922
CVE.org
https://www.cve.org/CVERecord?id=CVE-2017-18922
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00020.html
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00028.html
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00033.html
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00055.html
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00066.html
Mailing List
http://www.openwall.com/lists/oss-security/2020/06/30/3
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