CVE-2023-38545
curl - security update
描述
This flaw makes curl overflow a heap based buffer in the SOCKS5 proxy handshake. When curl is asked to pass along the host name to the SOCKS5 proxy to allow that to resolve the address instead of it getting done by curl itself, the maximum length that host name can be is 255 bytes. If the host name is detected to be longer, curl switches to local name resolving and instead passes on the resolved address only. Due to this bug, the local variable that means "let the host resolve the name" could get the wrong value during a slow SOCKS5 handshake, and contrary to the intention, copy the too long host name to the target buffer instead of copying just the resolved address there. The target buffer being a heap based buffer, and the host name coming from the URL that curl has been told to operate with.
如何修補 CVE-2023-38545
要修補 CVE-2023-38545,請將受影響套件升級到下列已修補版本。
- —升級至 8.4.0-r0 或更新版本
- —升級至 7.74.0-1.3+deb11u10 或更新版本
- —升級至 7.74.0-1.3+deb11u10 或更新版本
CVE-2023-38545 正在被利用嗎?
可能 — EPSS 為 78.5%,屬於高被利用機率區間,建議優先修補。
受影響套件(3)
- from 0, < 8.4.0-r0
- from 0, < 7.74.0-1.3+deb11u10
- from 0, < 7.74.0-1.3+deb11u10
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |