National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2017-13090 Detail

Current 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.

Source:  MITRE      Last Modified:  10/27/2017      View Analysis Description

Quick Info

CVE Dictionary Entry:
CVE-2017-13090
Original release date:
10/27/2017
Last revised:
12/29/2017
Source:
US-CERT/NIST

Impact

CVSS Severity (version 3.0):
CVSS v3 Base Score:
8.8 High
Vector:
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H (legend)
Impact Score:
5.9
Exploitability Score:
2.8
CVSS Version 3 Metrics:
Attack Vector (AV):
Network
Attack Complexity (AC):
Low
Privileges Required (PR):
None
User Interaction (UI):
Required
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
High
CVSS Severity (version 2.0):
CVSS v2 Base Score:
9.3 HIGH
Vector:
(AV:N/AC:M/Au:N/C:C/I:C/A:C) (legend)
Impact Subscore:
10.0
Exploitability Subscore:
8.6
CVSS Version 2 Metrics:
Access Vector:
Network exploitable - Victim must voluntarily interact with attack mechanism
Access Complexity:
Medium
Authentication:
Not required to exploit
Impact Type:
Allows unauthorized disclosure of information; Allows unauthorized modification; Allows disruption of service

References to Advisories, Solutions, and Tools

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

Technical Details

Vulnerability Type (View All)

Change History 6 change records found - show changes