CVE-2013-4207

描述

Buffer overflow in sshbn.c in PuTTY before 0.63 allows remote SSH servers to cause a denial of service (crash) via an invalid DSA signature that is not properly handled during computation of a modular inverse and triggers the overflow during a division by zero by the bignum functionality, a different vulnerability than CVE-2013-4206.

如何修補 CVE-2013-4207

要修補 CVE-2013-4207,請將受影響套件升級到下列已修補版本。

• Debian/filezilla—升級至 3.7.3-1 或更新版本
• Debian/putty—升級至 0.63-1 或更新版本

CVE-2013-4207 正在被利用嗎?

低 — EPSS 為 1.8%,目前沒有觀察到大規模利用活動。

受影響套件(2)

• from 0, < 3.7.3-1
• from 0, < 0.63-1

參考連結(1)

• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2013-4207