CVE-2011-4415
EPSS 3.1%
描述
The ap_pregsub function in server/util.c in the Apache HTTP Server 2.0.x through 2.0.64 and 2.2.x through 2.2.21, when the mod_setenvif module is enabled, does not restrict the size of values of environment variables, which allows local users to cause a denial of service (memory consumption or NULL pointer dereference) via a .htaccess file with a crafted SetEnvIf directive, in conjunction with a crafted HTTP request header, related to (1) the "len +=" statement and (2) the apr_pcalloc function call, a different vulnerability than CVE-2011-3607.
如何修補 CVE-2011-4415
要修補 CVE-2011-4415,請將受影響套件升級到下列已修補版本。
- Debian/apache2—升級至 2.4.1-1 或更新版本
CVE-2011-4415 正在被利用嗎?
低 — EPSS 為 3.1%,目前沒有觀察到大規模利用活動。
受影響套件(1)
- from 0, < 2.4.1-1