| Summary | Open Shortest Path First (OSPF) protocol implementations may improperly determine Link State Advertisement (LSA) recency for LSAs with MaxSequenceNumber. According to RFC 2328 section 13.1, for two instances of the same LSA, recency is determined by first comparing sequence numbers, then checksums, and finally MaxAge. In a case where the sequence numbers are the same, the LSA with the larger checksum is considered more recent, and will not be flushed from the Link State Database (LSDB). Since the RFC does not explicitly state that the values of links carried by a LSA must be the same when prematurely aging a self-originating LSA with MaxSequenceNumber, it is possible in vulnerable OSPF implementations for an attacker to craft a LSA with MaxSequenceNumber and invalid links that will result in a larger checksum and thus a 'newer' LSA that will not be flushed from the LSDB. Propagation of the crafted LSA can result in the erasure or alteration of the routing tables of routers within the routing domain, creating a denial of service condition or the re-routing of traffic on the network. CVE-2017-3224 has been reserved for Quagga and downstream implementations (SUSE, openSUSE, and Red Hat packages). |
|---|---|
| Publication Date | July 25, 2018, 12:29 a.m. |
| Registration Date | Jan. 26, 2021, 1:23 p.m. |
| Last Update | Nov. 21, 2024, 12:25 p.m. |
| CVSS3.0 : HIGH | |
| スコア | 8.2 |
|---|---|
| Vector | CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:H |
| 攻撃元区分(AV) | 隣接 |
| 攻撃条件の複雑さ(AC) | 高 |
| 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) | 変更あり |
| 機密性への影響(C) | 低 |
| 完全性への影響(I) | 高 |
| 可用性への影響(A) | 高 |
| CVSS2.0 : MEDIUM | |
| Score | 4.3 |
|---|---|
| Vector | AV:A/AC:M/Au:N/C:N/I:P/A:P |
| 攻撃元区分(AV) | 隣接 |
| 攻撃条件の複雑さ(AC) | 中 |
| 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) | 低 |
| 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 |
| Configuration1 | or higher | or less | more than | less than | |
| cpe:2.3:a:quagga:quagga:-:*:*:*:*:*:*:* | |||||
| Configuration2 | or higher | or less | more than | less than | |
| cpe:2.3:o:suse:opensuse:-:*:*:*:*:*:*:* | |||||
| cpe:2.3:o:suse:suse_linux:-:*:*:*:*:*:*:* | |||||
| Configuration3 | or higher | or less | more than | less than | |
| cpe:2.3:a:redhat:package_manager:-:*:*:*:*:*:*:* | |||||
| Title | Quagga におけるデータの信頼性についての不十分な検証に関する脆弱性 |
|---|---|
| Summary | Quagga には、データの信頼性についての不十分な検証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 | ベンダ情報および参考情報を参照して適切な対策を実施してください。 |
| Publication Date | July 27, 2017, midnight |
| Registration Date | Oct. 31, 2018, 4:58 p.m. |
| Last Update | Oct. 31, 2018, 4:58 p.m. |
| レッドハット |
| Red Hat Package Manager |
| Quagga |
| Quagga |
| SUSE |
| opensuse |
| SUSE LINUX |
| No | Changed Details | Date of change |
|---|---|---|
| 1 | [2018年10月31日] 掲載 |
Oct. 31, 2018, 4:58 p.m. |