CVE-2017-13089 Detail

Current Description

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.


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score matches with CNA score
CNA:  CERT/CC
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


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: The NVD and the CNA have provided the same score. When this occurs only the CNA information is displayed, but the Acceptance Level icon for the CNA is given a checkmark to signify NVD concurrence.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://git.savannah.gnu.org/cgit/wget.git/commit/?id=d892291fb8ace4c3b734ea5125770989c215df3f Issue Tracking  Patch  Third Party Advisory 
http://www.debian.org/security/2017/dsa-4008 Issue Tracking  Third Party Advisory 
http://www.securityfocus.com/bid/101592 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://github.com/r1b/CVE-2017-13089 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.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-121 Stack-based Buffer Overflow Reference acceptance level CERT/CC  

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Change History

7 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2017-13089
NVD Published Date:
10/27/2017
NVD Last Modified:
12/29/2017
Source:
MITRE