CVE-2020-2253

描述

Email Extension Plugin 2.75 and earlier does not perform hostname validation when connecting to the configured SMTP server. This lack of validation could be abused using a man-in-the-middle attack to intercept these connections. Email Extension Plugin 2.76 validates the SMTP hostname when connecting via TLS by default. In Email Extension Plugin 2.75 and earlier, administrators can set the Java system property `mail.smtp.ssl.checkserveridentity` to `true` on startup to enable this protection. Alternatively, this protection can be enabled (or disabled in the new version) via the 'Advanced Email Properties' field in the plugin’s configuration in Configure System. In case of problems, this protection can be disabled again by setting `mail.smtp.ssl.checkserveridentity` to `false` using either method.

如何修補 CVE-2020-2253

要修補 CVE-2020-2253,請將受影響套件升級到下列已修補版本。

• —升級至 2.76 或更新版本

CVE-2020-2253 正在被利用嗎?

低 — EPSS 為 0.7%,目前沒有觀察到大規模利用活動。

受影響套件(1)

• from 0, < 2.76

CVSS 分數

參考連結(5)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2020-2253
• PATCHgithub.com/jenkinsci/email-ext-plugin
• WEBwww.openwall.com/lists/oss-security/2020/09/16/3
• WEBgithub.com/jenkinsci/email-ext-plugin/commit/ac039ba581f5946975a327709ff201b459900caa