CVE-2019-12521
5.9
MEDIUM
CVSS 3.1
EPSS 0.56%
描述
An issue was discovered in Squid through 4.7. When Squid is parsing ESI, it keeps the ESI elements in ESIContext. ESIContext contains a buffer for holding a stack of ESIElements. When a new ESIElement is parsed, it is added via addStackElement. addStackElement has a check for the number of elements in this buffer, but it's off by 1, leading to a Heap Overflow of 1 element. The overflow is within the same structure so it can't affect adjacent memory blocks, and thus just leads to a crash while processing.
如何修補 CVE-2019-12521
要修補 CVE-2019-12521,請將受影響套件升級到下列已修補版本。
- —升級至 4.11-r0 或更新版本
- —升級至 4.11-1 或更新版本
CVE-2019-12521 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(2)
- from 0, < 4.11-r0
- from 0, < 4.11-1
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |