CVE-2021-37706
asterisk - security update
描述
PJSIP is a free and open source multimedia communication library written in C language implementing standard based protocols such as SIP, SDP, RTP, STUN, TURN, and ICE. In affected versions if the incoming STUN message contains an ERROR-CODE attribute, the header length is not checked before performing a subtraction operation, potentially resulting in an integer underflow scenario. This issue affects all users that use STUN. A malicious actor located within the victim’s network may forge and send a specially crafted UDP (STUN) message that could remotely execute arbitrary code on the victim’s machine. Users are advised to upgrade as soon as possible. There are no known workarounds.
如何修補 CVE-2021-37706
要修補 CVE-2021-37706,請將受影響套件升級到下列已修補版本。
- —升級至 1:16.28.0~dfsg-0+deb11u1 或更新版本
- —升級至 20210112.2.b757bac~ds1-1+deb11u1 或更新版本
CVE-2021-37706 正在被利用嗎?
低 — EPSS 為 4.6%,目前沒有觀察到大規模利用活動。
受影響套件(2)
- from 0, < 1:16.28.0~dfsg-0+deb11u1
- from 0, < 20210112.2.b757bac~ds1-1+deb11u1
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 |