CVE-2018-17205
| Summary |
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.
|
| Publication Date |
Sept. 20, 2018, 1:29 a.m. |
| Registration Date |
March 1, 2021, 7:06 p.m. |
| Last Update |
Nov. 21, 2024, 12:54 p.m. |
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CVSS3.0 : HIGH
|
| スコア |
7.5
|
| Vector |
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 攻撃元区分(AV) |
ネットワーク |
| 攻撃条件の複雑さ(AC) |
低 |
| 攻撃に必要な特権レベル(PR) |
不要 |
| 利用者の関与(UI) |
不要 |
| 影響の想定範囲(S) |
変更なし |
| 機密性への影響(C) |
なし |
| 完全性への影響(I) |
なし |
| 可用性への影響(A) |
高 |
|
CVSS2.0 : MEDIUM
|
| Score |
5.0
|
| Vector |
AV:N/AC:L/Au:N/C:N/I:N/A:P |
| 攻撃元区分(AV) |
ネットワーク |
| 攻撃条件の複雑さ(AC) |
低 |
| 攻撃前の認証要否(Au) |
不要 |
| 機密性への影響(C) |
なし |
| 完全性への影響(I) |
なし |
| 可用性への影響(A) |
低 |
| Get all privileges. |
いいえ
|
| Get user privileges |
いいえ
|
| Get other privileges |
いいえ
|
| User operation required |
いいえ
|
Affected software configurations
| Configuration1 |
or higher |
or less |
more than |
less than |
| cpe:2.3:a:openvswitch:openvswitch:*:*:*:*:*:*:*:* |
2.7.0 |
2.7.6 |
|
|
| Configuration2 |
or higher |
or less |
more than |
less than |
| cpe:2.3:a:redhat:openstack:10:*:*:*:*:*:*:* |
|
|
|
|
| cpe:2.3:a:redhat:openstack:13:*:*:*:*:*:*:* |
|
|
|
|
| Configuration3 |
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:*:*:* |
|
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|
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Related information, measures and tools
Common Vulnerabilities List
JVN Vulnerability Information
Open vSwitch における入力確認に関する脆弱性
| Title |
Open vSwitch における入力確認に関する脆弱性
|
| Summary |
Open vSwitch (OvS) には、入力確認に関する脆弱性が存在します。
|
| Possible impacts |
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 |
June 16, 2018, midnight |
| Registration Date |
March 7, 2019, 5:15 p.m. |
| Last Update |
March 7, 2019, 5:15 p.m. |
Affected System
| レッドハット |
|
Red Hat OpenStack
|
|
Red Hat Virtualization
|
| Open vSwitch |
|
Open vSwitch 2.7.6 までの 2.7.x
|
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
Change Log
| No |
Changed Details |
Date of change |
| 1 |
[2019年03月07日]
掲載 |
March 7, 2019, 5:15 p.m. |