LibVNC before 2f5b2ad1c6c99b1ac6482c95844a84d66bb52838 contains multiple weaknesses CWE-665: Improper Initialization vulnerability in VNC client code that allows attacker to read stack memory and can be abuse for information disclosure. Combined with another vulnerability, it can be used to leak stack memory layout and in bypassing ASLR
総合評価: CVE-2018-20022 は中リスク(62.6/100)。CVSS 深刻度は高。悪用される可能性が高い(EPSS 6.18%、91 パーセンタイル) 根拠: EPSS 上、短期間での悪用可能性は高い水準です。 推奨対応: 悪用可能性が高いため、影響範囲の確認と修補の優先付けを推奨します。
リスクは変動します。再評価に基づき、本ページの表示内容を更新しています。
EPSS は日次で悪用されやすさの相対度合いを推定します。パーセンタイルは採点済み CVE の中での相対位置(高いほど相対的に深刻)を示します。
| # | 日付 | 旧 EPSS スコア | 新 EPSS スコア | Δ(新 − 旧) |
|---|---|---|---|---|
| 1 | 2025-12-28 | 5.26% | 6.18% | +0.92% |
| 2 | 2025-12-27 | 6.18% | 5.26% | -0.92% |
| 3 | 2025-11-21 | — | 6.18% | — |
EPSS の全履歴 (全 19 件)
この CVE の CVSS 指標。
| ベーススコア | バージョン | 深刻度 | ベクトル | 悪用しやすさ | 影響 | スコアの出典 |
|---|---|---|---|---|---|---|
| 7.5 | 3.0 | HIGH |
|
3.9 | 3.6 | [email protected] |
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
high | CVE-2018-20022: 1 source package rows (libvncserver); 4 state rows across 2 repos (3.22-community, edge-community); fixed 0, open 4. | https://security.alpinelinux.org/vuln/CVE-2018-20022 |
debian
|
not yet assigned | CVE-2018-20022 not yet assigned priority: Debian including 4 source packages (libvncserver, ssvnc, tightvnc, veyon), 20 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 20. | https://security-tracker.debian.org/tracker/CVE-2018-20022 |
gentoo
|
normal | CVE-2018-20022: 2 GLSA(s) (201908-05, 202006-06), 2 atom(s) (net-libs/libvncserver, net-misc/ssvnc); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2018-20022 |
redhat
|
low | — | https://access.redhat.com/security/cve/CVE-2018-20022 |
suse
|
medium | CVE-2018-20022 severity moderate: SUSE including 22 source package names (LibVNCServer-0.9.1-160.6.1, LibVNCServer-devel-0.9.1-160.6.1, …), 86 product×package rows across 54 product lines (SUSE Enterprise Storage 4, SUSE Linux Enterprise High Performance Computing 12 SP5, … (54 product lines)): Fixed 86. | https://www.suse.com/security/cve/CVE-2018-20022/ |
ubuntu
|
medium | CVE-2018-20022 medium priority: Ubuntu including 5 source packages (italc, libvncserver, ssvnc, tightvnc, x11vnc), 84 status rows across 18 suites (bionic, cosmic, disco, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 41, DNE 14, released 12, ignored 9, needs-triage 7, needed 1. | https://ubuntu.com/security/CVE-2018-20022 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| libvnc_project | libvncserver | < 0.9.12 | cpe:2.3:a:libvnc_project:libvncserver:*:*:*:*:*:*:*:* |
| debian | debian_linux | 8.0 | cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* |
| debian | debian_linux | 9.0 | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* |
| canonical | ubuntu_linux | 14.04 | cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* |
| canonical | ubuntu_linux | 16.04 | cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* |
| canonical | ubuntu_linux | 18.04 | cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* |
| canonical | ubuntu_linux | 18.10 | cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:* |