| Summary | curl 7.63.0 to and including 7.75.0 includes vulnerability that allows a malicious HTTPS proxy to MITM a connection due to bad handling of TLS 1.3 session tickets. When using a HTTPS proxy and TLS 1.3, libcurl can confuse session tickets arriving from the HTTPS proxy but work as if they arrived from the remote server and then wrongly "short-cut" the host handshake. When confusing the tickets, a HTTPS proxy can trick libcurl to use the wrong session ticket resume for the host and thereby circumvent the server TLS certificate check and make a MITM attack to be possible to perform unnoticed. Note that such a malicious HTTPS proxy needs to provide a certificate that curl will accept for the MITMed server for an attack to work - unless curl has been told to ignore the server certificate check. |
|---|---|
| Publication Date | April 2, 2021, 3:15 a.m. |
| Registration Date | April 2, 2021, 10:02 a.m. |
| Last Update | Nov. 21, 2024, 2:50 p.m. |
| CVSS3.1 : LOW | |
| スコア | 3.7 |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N |
| 攻撃元区分(AV) | ネットワーク |
| 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) | 変更なし |
| 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) | なし |
| CVSS2.0 : MEDIUM | |
| Score | 4.3 |
|---|---|
| Vector | AV:N/AC:M/Au:N/C:N/I:P/A:N |
| 攻撃元区分(AV) | ネットワーク |
| 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) | 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:haxx:libcurl:*:*:*:*:*:*:*:* | 7.63.0 | 7.75.0 | |||
| Configuration2 | or higher | or less | more than | less than | |
| cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* | |||||
| cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | |||||
| cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* | |||||
| Configuration3 | or higher | or less | more than | less than | |
| cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:* | |||||
| cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:* | |||||
| cpe:2.3:h:netapp:hci_storage_node:-:*:*:*:*:*:*:* | |||||
| Configuration4 | or higher | or less | more than | less than | |
| cpe:2.3:o:broadcom:fabric_operating_system:-:*:*:*:*:*:*:* | |||||
| Configuration5 | or higher | or less | more than | less than | |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | |||||
| Configuration6 | or higher | or less | more than | less than | |
| cpe:2.3:a:siemens:sinec_infrastructure_network_services:*:*:*:*:*:*:*:* | 1.0.1.1 | ||||
| Configuration7 | or higher | or less | more than | less than | |
| cpe:2.3:a:oracle:communications_billing_and_revenue_management:12.0.0.3.0:*:*:*:*:*:*:* | |||||
| cpe:2.3:a:oracle:essbase:21.2:*:*:*:*:*:*:* | |||||
| Configuration8 | or higher | or less | more than | less than | |
| cpe:2.3:a:splunk:universal_forwarder:9.1.0:*:*:*:*:*:*:* | |||||
| cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:* | 9.0.0 | 9.0.6 | |||
| cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:* | 8.2.0 | 8.2.12 | |||
| Title | curl におけるスプーフィングによる認証回避に関する脆弱性 |
|---|---|
| Summary | curl には、スプーフィングによる認証回避に関する脆弱性が存在します。 |
| Possible impacts | 情報を改ざん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 | March 31, 2021, midnight |
| Registration Date | Oct. 5, 2021, 2:56 p.m. |
| Last Update | Oct. 5, 2021, 2:56 p.m. |
| Broadcom |
| Fabric Operating System |
| 日立 |
| JP1/Automatic Job Management System 3 - Agent |
| JP1/Automatic Job Management System 3 - Agent Minimal Edition |
| JP1/Automatic Job Management System 3 - Manager |
| Debian |
| Debian GNU/Linux |
| Fedora Project |
| Fedora |
| Haxx |
| libcurl 7.63.0 から 7.75.0 |
| NetApp |
| NetApp HCI Management Node |
| NetApp HCI Storage Node |
| NetApp SolidFire |
| No | Changed Details | Date of change |
|---|---|---|
| 1 | [2021年07月21日] 掲載 | July 21, 2021, 3:53 p.m. |