CVE-2023-22742
git2 does not verify SSH keys by default
描述
libgit2 is a cross-platform, linkable library implementation of Git. When using an SSH remote with the optional libssh2 backend, libgit2 does not perform certificate checking by default. Prior versions of libgit2 require the caller to set the `certificate_check` field of libgit2's `git_remote_callbacks` structure - if a certificate check callback is not set, libgit2 does not perform any certificate checking. This means that by default - without configuring a certificate check callback, clients will not perform validation on the server SSH keys and may be subject to a man-in-the-middle attack. Users are encouraged to upgrade to v1.4.5 or v1.5.1. Users unable to upgrade should ensure that all relevant certificates are manually checked.
如何修補 CVE-2023-22742
要修補 CVE-2023-22742,請將受影響套件升級到下列已修補版本。
- —升級至 1.1.0+dfsg.1-4+deb11u1 或更新版本
- —升級至 0.16.1 或更新版本
- —升級至 0.14.2 或更新版本
- —升級至 0.13.5 或更新版本
CVE-2023-22742 正在被利用嗎?
低 — EPSS 為 0.6%,目前沒有觀察到大規模利用活動。
受影響套件(4)
- from 0, < 1.1.0+dfsg.1-4+deb11u1
- from 0, < 0.16.1
- >= 0.14.0, < 0.14.2
- >= 0.0.0-0, < 0.13.5, >= 0.14.0, < 0.14.2
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.8 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N |