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Out-of-Bounds Affecting wget-debuginfo package, versions <0:1.18-3.28.amzn1

Severity

 Recommended
0.0
high
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
36.56% (99th percentile)

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  • Snyk IDSNYK-AMZN201803-WGETDEBUGINFO-1709356
  • published27 Sept 2021
  • disclosed27 Oct 2017
Report a new vulnerability Found a mistake?

Introduced: 27 Oct 2017

CVE-2017-13090  (opens in a new tab)
CWE-119  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2018.03 wget-debuginfo to version 0:1.18-3.28.amzn1 or higher.
This issue was patched in ALAS-2017-916.

NVD Description

Note: Versions mentioned in the description apply only to the upstream wget-debuginfo package and not the wget-debuginfo package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2018.03 relevant fixed versions and status.

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.