The FPC (Flexible PIC Concentrator) of Juniper Networks Junos OS and Junos OS Evolved may restart after processing a specific IPv4 packet. Only packets destined to the device itself, successfully reaching the RE through existing edge and control plane filtering, will be able to cause the FPC restart. When this issue occurs, all traffic via the FPC will be dropped. By continuously sending this specific IPv4 packet, an attacker can repeatedly crash the FPC, causing an extended Denial of Service (DoS) condition. This issue can only occur when processing a specific IPv4 packet. IPv6 packets cannot trigger this issue. This issue affects: Juniper Networks Junos OS on MX Series with MPC10E or MPC11E and PTX10001: 19.2 versions prior to 19.2R1-S4, 19.2R2; 19.3 versions prior to 19.3R2-S2, 19.3R3; 19.4 versions prior to 19.4R1-S1, 19.4R2. Juniper Networks Junos OS Evolved on on QFX5220, and PTX10003 series: 19.2-EVO versions; 19.3-EVO versions; 19.4-EVO versions prior to 19.4R2-EVO. This issue does not affect Junos OS versions prior to 19.2R1. This issue does not affect Junos OS Evolved versions prior to 19.2R1-EVO.
総合評価: CVE-2020-1638 は中リスク(54.1/100)。CVSS 深刻度は高。悪用される可能性が高い(EPSS 1.29%、66 パーセンタイル) 推奨対応: 影響資産を整理し、修補計画に組み込んでください。
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 | 2026-06-15 | 0.39% | 1.29% | +0.90% |
| 2 | 2025-03-30 | 0.61% | 0.39% | -0.22% |
| 3 | 2025-03-29 | — | 0.61% | — |
EPSS の全履歴 (全 9 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 | 3.1 | HIGH |
|
3.9 | 3.6 | [email protected] |
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | [email protected] |
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| juniper | junos | 19.2 | cpe:2.3:o:juniper:junos:19.2:-:*:*:*:*:*:* |
| juniper | junos | 19.2 | cpe:2.3:o:juniper:junos:19.2:r1:*:*:*:*:*:* |
| juniper | junos | 19.2 | cpe:2.3:o:juniper:junos:19.2:r1-s1:*:*:*:*:*:* |
| juniper | junos | 19.2 | cpe:2.3:o:juniper:junos:19.2:r1-s2:*:*:*:*:*:* |
| juniper | junos | 19.2 | cpe:2.3:o:juniper:junos:19.2:r1-s3:*:*:*:*:*:* |
| juniper | junos | 19.3 | cpe:2.3:o:juniper:junos:19.3:r1:*:*:*:*:*:* |
| juniper | junos | 19.3 | cpe:2.3:o:juniper:junos:19.3:r1-s1:*:*:*:*:*:* |
| juniper | junos | 19.3 | cpe:2.3:o:juniper:junos:19.3:r2:*:*:*:*:*:* |
| juniper | junos | 19.3 | cpe:2.3:o:juniper:junos:19.3:r2-s1:*:*:*:*:*:* |
| juniper | junos | 19.4 | cpe:2.3:o:juniper:junos:19.4:r1:*:*:*:*:*:* |
| juniper | junos_os_evolved | 19.2 | cpe:2.3:o:juniper:junos_os_evolved:19.2:r1:*:*:*:*:*:* |
| juniper | junos_os_evolved | 19.3 | cpe:2.3:o:juniper:junos_os_evolved:19.3:r2:*:*:*:*:*:* |
| juniper | junos_os_evolved | 19.4 | cpe:2.3:o:juniper:junos_os_evolved:19.4:r1:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| https://kb.juniper.net/JSA11019 | Vendor Advisory |