CVE-2017-13090

描述

The retr.c:fd_read_body() function is called when processing OK responses. When the response is sent chunked in wget before 1.19.2, the chunk parser uses strtol() to read each chunk's length, but doesn't check that the chunk length is a non-negative number. The code then tries to read the chunk in pieces of 8192 bytes by using the MIN() macro, but ends up passing the negative chunk length to retr.c:fd_read(). As fd_read() takes an int argument, the high 32 bits of the chunk length are discarded, leaving fd_read() with a completely attacker controlled length argument. The attacker can corrupt malloc metadata after the allocated buffer.

如何修補 CVE-2017-13090

要修補 CVE-2017-13090,請將受影響套件升級到下列已修補版本。

• —升級至 1.19.2-r0 或更新版本
• —升級至 1.19.2-1 或更新版本

CVE-2017-13090 正在被利用嗎?

中等 — EPSS 為 36.6%,可持續追蹤但非最高優先。

受影響套件(2)

• from 0, < 1.19.2-r0
• from 0, < 1.19.2-1

CVSS 分數

參考連結(2)

• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2017-13090
• ADVISORYsecurity.alpinelinux.org/vuln/CVE-2017-13090