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LibVNCServer におけるエントロピー不足に関する脆弱性
Title LibVNCServer におけるエントロピー不足に関する脆弱性
Summary

LibVNCServer には、エントロピー不足に関する脆弱性が存在します。

Possible impacts 情報を取得される、情報を改ざんされる、およびサービス運用妨害 (DoS) 状態にされる可能性があります。
Solution

ベンダより正式な対策が公開されています。ベンダ情報を参照して適切な対策を実施してください。
Publication Date May 15, 2017, midnight
Registration Date Aug. 7, 2020, 5:39 p.m.
Last Update Dec. 17, 2021, 11:26 a.m.
CVSS3.0 : 緊急
Score 9.8
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS2.0 : 危険
Score 7.5
Vector AV:N/AC:L/Au:N/C:P/I:P/A:P
Affected System
Fedora Project
Fedora 
Canonical
Ubuntu 
openSUSE project
openSUSE Leap 
LibVNC
LibVNCServer 0.9.12 未満
CVE (情報セキュリティ 共通脆弱性識別子)
CWE (共通脆弱性タイプ一覧)
ベンダー情報
その他
Change Log
No Changed Details Date of change
1 [2020年08月07日]
  掲載		 Aug. 7, 2020, 5:39 p.m.
2 [2021年12月17日]
  参考情報：JVN (JVNVU#96592426) を追加		 Dec. 17, 2021, 11:24 a.m.
NVD Vulnerability Information
CVE-2017-18922
Summary

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.

Publication Date June 30, 2020, 8:15 p.m.
Registration Date Jan. 26, 2021, 1:21 p.m.
Last Update Nov. 21, 2024, 12:21 p.m.
Affected software configurations
Configuration1 or higher or less more than less than
cpe:2.3:a:libvncserver_project:libvncserver:*:*:*:*:*:*:*:* 0.9.12
Configuration2 or higher or less more than less than
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
Configuration3 or higher or less more than less than
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*
Configuration4 or higher or less more than less than
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
Configuration5 or higher or less more than less than
cpe:2.3:o:siemens:simatic_itc1500_firmware:*:*:*:*:*:*:*:* 3.0.0.0 3.2.1.0
execution environment
1 cpe:2.3:h:siemens:simatic_itc1500:-:*:*:*:*:*:*:*
Configuration6 or higher or less more than less than
cpe:2.3:o:siemens:simatic_itc1500_pro_firmware:*:*:*:*:*:*:*:* 3.0.0.0 3.2.1.0
execution environment
1 cpe:2.3:h:siemens:simatic_itc1500_pro:-:*:*:*:*:*:*:*
Configuration7 or higher or less more than less than
cpe:2.3:o:siemens:simatic_itc1900_firmware:*:*:*:*:*:*:*:* 3.0.0.0 3.2.1.0
execution environment
1 cpe:2.3:h:siemens:simatic_itc1900:-:*:*:*:*:*:*:*
Configuration8 or higher or less more than less than
cpe:2.3:o:siemens:simatic_itc1900_pro_firmware:*:*:*:*:*:*:*:* 3.0.0.0 3.2.1.0
execution environment
1 cpe:2.3:h:siemens:simatic_itc1900_pro:-:*:*:*:*:*:*:*
Configuration9 or higher or less more than less than
cpe:2.3:o:siemens:simatic_itc2200_firmware:*:*:*:*:*:*:*:* 3.0.0.0 3.2.1.0
execution environment
1 cpe:2.3:h:siemens:simatic_itc2200:-:*:*:*:*:*:*:*
Configuration10 or higher or less more than less than
cpe:2.3:o:siemens:simatic_itc2200_pro_firmware:*:*:*:*:*:*:*:* 3.0.0.0 3.2.1.0
execution environment
1 cpe:2.3:h:siemens:simatic_itc2200_pro:-:*:*:*:*:*:*:*
Related information, measures and tools
Common Vulnerabilities List