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Out-of-Bounds Affecting wget package, versions <1.16-1+deb8u4

0.0
high

Snyk CVSS

    Attack Complexity Low
    User Interaction Required
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 64.47% (98th percentile)
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NVD
8.8 high
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Red Hat
7.8 high

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  • Snyk ID SNYK-DEBIAN8-WGET-300457
  • published 27 Oct 2017
  • disclosed 27 Oct 2017
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Introduced: 27 Oct 2017

CVE-2017-13089 Open this link in a new tab
CWE-119 Open this link in a new tab
CWE-121 Open this link in a new tab

How to fix?

Upgrade Debian:8 wget to version 1.16-1+deb8u4 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream wget package and not the wget package as distributed by Debian. See How to fix? for Debian:8 relevant fixed versions and status.

The http.c:skip_short_body() function is called in some circumstances, such as when processing redirects. 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 skip the chunk in pieces of 512 bytes by using the MIN() macro, but ends up passing the negative chunk length to connect.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.