An issue was discovered in Open vSwitch (OvS) 2.7.x through 2.7.6, affecting ofproto_rule_insert__ in ofproto/ofproto.c. During bundle commit, flows that are added in a bundle are applied to ofproto in order. If a flow cannot be added (e.g., the flow action is a go-to for a group id that does not exist), OvS tries to revert back all previous flows that were successfully applied from the same bundle. This is possible since OvS maintains list of old flows that were replaced by flows from the bundle. While reinserting old flows, OvS has an assertion failure due to a check on rule state != RULE_INITIALIZED. This would work for new flows, but for an old flow the rule state is RULE_REMOVED. The assertion failure causes an OvS crash.
総合評価: CVE-2018-17205 は悪用リスクが高い(69.4/100)。CVSS 深刻度は高。悪用される可能性が高い(EPSS 0.82%、72 パーセンタイル) 根拠: 公開エクスプロイトが 1 件参照されています(Exploit-DB)。 推奨対応: 公開エクスプロイトが確認されています。影響範囲の確認、緩和策の適用、パッチ適用を優先してください。
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。
| EDB-ID | ソース | 種別 | 公開 | リンク |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
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 | 2025-03-30 | 1.69% | 0.82% | -0.88% |
| 2 | 2025-03-29 | 0.82% | 1.69% | +0.88% |
| 3 | 2025-03-17 | — | 0.82% | — |
EPSS の全履歴 (全 11 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 |
|---|---|---|---|
debian
|
not yet assigned | CVE-2018-17205 not yet assigned priority: Debian including 1 source packages (openvswitch), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2018-17205 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2018-17205 |
suse
|
medium | — | https://www.suse.com/security/cve/CVE-2018-17205/ |
ubuntu
|
medium | CVE-2018-17205 medium priority: Ubuntu including 1 source packages (openvswitch), 5 status rows across 5 suites (bionic, cosmic, trusty, upstream, xenial): not-affected 2, DNE 1, needs-triage 1, released 1. | https://ubuntu.com/security/CVE-2018-17205 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| openvswitch | openvswitch | >= 2.7.0, <= 2.7.6 | cpe:2.3:a:openvswitch:openvswitch:*:*:*:*:*:*:*:* |
| redhat | openstack | 10 | cpe:2.3:a:redhat:openstack:10:*:*:*:*:*:*:* |
| redhat | openstack | 13 | cpe:2.3:a:redhat:openstack:13:*:*:*:*:*:*:* |
| 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:*:*:* |
| URL | タグ |
|---|---|
| https://access.redhat.com/errata/RHSA-2018:3500 | Third Party Advisory |
| https://access.redhat.com/errata/RHSA-2019:0053 | Third Party Advisory |
| https://access.redhat.com/errata/RHSA-2019:0081 | Third Party Advisory |
| https://github.com/openvswitch/ovs/commit/0befd1f3745055c32940f5faf9559be6a14395e6 | Exploit Patch Third Party Advisory |
| https://usn.ubuntu.com/3873-1/ | Third Party Advisory |