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Vulnerability Details : CVE-2017-13090

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.
Publish Date : 2017-10-27 Last Update Date : 2017-12-30
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- CVSS Scores & Vulnerability Types

CVSS Score
9.3
Confidentiality Impact Complete (There is total information disclosure, resulting in all system files being revealed.)
Integrity Impact Complete (There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the entire system being compromised.)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Overflow
CWE ID 119

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2017:3075: wget security update (Important) oval:com.redhat.rhsa:def:20173075 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2017-13090

# Product Type Vendor Product Version Update Edition Language
1 OS Debian Debian Linux 8.0 * * * Version Details Vulnerabilities
2 OS Debian Debian Linux 9.0 * * * Version Details Vulnerabilities
3 Application GNU Wget * * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Debian Debian Linux 2
GNU Wget 1

- References For CVE-2017-13090

https://security.gentoo.org/glsa/201711-06
GENTOO GLSA-201711-06
http://www.debian.org/security/2017/dsa-4008
DEBIAN DSA-4008
https://www.viestintavirasto.fi/en/cybersecurity/vulnerabilities/2017/haavoittuvuus-2017-037.html
http://git.savannah.gnu.org/cgit/wget.git/commit/?id=ba6b44f6745b14dce414761a8e4b35d31b176bba CONFIRM
https://www.synology.com/support/security/Synology_SA_17_62_Wget CONFIRM
https://access.redhat.com/errata/RHSA-2017:3075
REDHAT RHSA-2017:3075
http://www.securitytracker.com/id/1039661
SECTRACK 1039661
http://www.securityfocus.com/bid/101590
BID 101590 GNU wget CVE-2017-13090 Heap Buffer Overflow Vulnerability Release Date:2017-11-14

- Metasploit Modules Related To CVE-2017-13090

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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