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CVE-2017-13090 Detail

Description

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.


Metrics

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CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://git.savannah.gnu.org/cgit/wget.git/commit/?id=ba6b44f6745b14dce414761a8e4b35d31b176bba Issue Tracking  Patch  Third Party Advisory 
http://git.savannah.gnu.org/cgit/wget.git/commit/?id=ba6b44f6745b14dce414761a8e4b35d31b176bba Issue Tracking  Patch  Third Party Advisory 
http://www.debian.org/security/2017/dsa-4008 Issue Tracking  Third Party Advisory 
http://www.debian.org/security/2017/dsa-4008 Issue Tracking  Third Party Advisory 
http://www.securityfocus.com/bid/101590 Issue Tracking  Third Party Advisory  VDB Entry 
http://www.securityfocus.com/bid/101590 Issue Tracking  Third Party Advisory  VDB Entry 
http://www.securitytracker.com/id/1039661 Issue Tracking  Third Party Advisory  VDB Entry 
http://www.securitytracker.com/id/1039661 Issue Tracking  Third Party Advisory  VDB Entry 
https://access.redhat.com/errata/RHSA-2017:3075
https://access.redhat.com/errata/RHSA-2017:3075
https://security.gentoo.org/glsa/201711-06 Issue Tracking  Third Party Advisory 
https://security.gentoo.org/glsa/201711-06 Issue Tracking  Third Party Advisory 
https://www.synology.com/support/security/Synology_SA_17_62_Wget
https://www.synology.com/support/security/Synology_SA_17_62_Wget
https://www.viestintavirasto.fi/en/cybersecurity/vulnerabilities/2017/haavoittuvuus-2017-037.html Issue Tracking  Patch  Third Party Advisory 
https://www.viestintavirasto.fi/en/cybersecurity/vulnerabilities/2017/haavoittuvuus-2017-037.html Issue Tracking  Patch  Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer cwe source acceptance level NIST  
CWE-122 Heap-based Buffer Overflow CERT/CC  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

9 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2017-13090
NVD Published Date:
10/27/2017
NVD Last Modified:
11/20/2024
Source:
CERT/CC