| Summary | There is a carry propagating bug in the x86_64 Montgomery squaring procedure in OpenSSL before 1.0.2m and 1.1.0 before 1.1.0g. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. |
|---|---|
| Publication Date | Nov. 3, 2017, 2:29 a.m. |
| Registration Date | Jan. 26, 2021, 1:23 p.m. |
| Last Update | Nov. 21, 2024, 12:26 p.m. |
| CVSS3.0 : MEDIUM | |
| スコア | 6.5 |
|---|---|
| Vector | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| 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) | 低 |
| 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) | 高 |
| 完全性への影響(I) | なし |
| 可用性への影響(A) | なし |
| CVSS2.0 : MEDIUM | |
| Score | 4.0 |
|---|---|
| Vector | AV:N/AC:L/Au:S/C:P/I:N/A:N |
| 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) | 単一 |
| 機密性への影響(C) | 低 |
| 完全性への影響(I) | なし |
| 可用性への影響(A) | なし |
| 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:openssl:openssl:*:*:*:*:*:*:*:* | 1.1.0 | 1.1.0g | |||
| cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* | 1.0.2 | 1.0.2m | |||
| Title | OpenSSL における脆弱性 |
|---|---|
| Summary | OpenSSL には、x86_64 Montgomery squaring プロシージャのキャリー伝播に関する問題があるため、不特定の影響を受ける脆弱性が存在します。 |
| Possible impacts | 不特定の影響を受け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 | Nov. 2, 2017, midnight |
| Registration Date | Dec. 7, 2017, 11:03 a.m. |
| Last Update | Aug. 1, 2019, 3:50 p.m. |
| OpenSSL Project |
| OpenSSL 1.0.2m 未満 |
| OpenSSL 1.1.0g 未満の 1.1.0 |
| 日立 |
| Cosminexus HTTP Server |
| Hitachi Automation Director (海外版) |
| Hitachi Automation Director (国内版) |
| Hitachi Compute Systems Manager |
| Hitachi Configuration Manager |
| Hitachi Device Manager |
| Hitachi Global Link Manager |
| Hitachi Infrastructure Analytics Advisor |
| Hitachi Replication Manager |
| Hitachi Tiered Storage Manager |
| Hitachi Tuning Manager |
| JP1/Automatic Job Management System 3 - Web Console (Windows, Linux) |
| JP1/Automatic Operation |
| JP1/IT Desktop Management 2 - Smart Device Manager |
| JP1/Operations Analytics |
| JP1/Performance Management - Web Console |
| JP1/SNMP System Observer |
| uCosminexus Application Server |
| uCosminexus Application Server -R |
| uCosminexus Developer |
| uCosminexus Primary Server Base |
| uCosminexus Service Architect |
| uCosminexus Service Platform |
| No | Changed Details | Date of change |
|---|---|---|
| 1 | [2019年02月05日] 影響を受けるシステム：ベンダ情報の追加に伴い内容を更新 ベンダ情報：日立 (hitachi-sec-2019-105) を追加 |
Feb. 5, 2019, 10:38 a.m. |
| 2 | [2019年07月29日] 影響を受けるシステム：内容を更新 |
July 29, 2019, 10:45 a.m. |
| 0 | [2017年12月07日] 掲載 [2018年02月13日] 影響を受けるシステム：ベンダ情報の追加に伴い内容を更新 ベンダ情報：日立 (hitachi-sec-2018-106) を追加 [2018年08月13日] 影響を受けるシステム：ベンダ情報の追加に伴い内容を更新 ベンダ情報：日立 (hitachi-sec-2018-124) を追加 |
Aug. 13, 2018, 4:48 p.m. |