CVE-2020-24240
5.5
MEDIUM
CVSS 3.1
EPSS 1.3%
描述
GNU Bison before 3.7.1 has a use-after-free in _obstack_free in lib/obstack.c (called from gram_lex) when a '\0' byte is encountered. NOTE: there is a risk only if Bison is used with untrusted input, and the observed bug happens to cause unsafe behavior with a specific compiler/architecture. The bug report was intended to show that a crash may occur in Bison itself, not that a crash may occur in code that is generated by Bison.
如何修補 CVE-2020-24240
要修補 CVE-2020-24240,請將受影響套件升級到下列已修補版本。
- —升級至 3.7.2-r0 或更新版本
- —升級至 2:3.7.2+dfsg-1 或更新版本
CVE-2020-24240 正在被利用嗎?
低 — EPSS 為 1.3%,目前沒有觀察到大規模利用活動。
受影響套件(2)
- from 0, < 3.7.2-r0
- from 0, < 2:3.7.2+dfsg-1
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.5 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |