National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2017-1000100 Detail

Current Description

When doing a TFTP transfer and curl/libcurl is given a URL that contains a very long file name (longer than about 515 bytes), the file name is truncated to fit within the buffer boundaries, but the buffer size is still wrongly updated to use the untruncated length. This too large value is then used in the sendto() call, making curl attempt to send more data than what is actually put into the buffer. The endto() function will then read beyond the end of the heap based buffer. A malicious HTTP(S) server could redirect a vulnerable libcurl-using client to a crafted TFTP URL (if the client hasn't restricted which protocols it allows redirects to) and trick it to send private memory contents to a remote server over UDP. Limit curl's redirect protocols with --proto-redir and libcurl's with CURLOPT_REDIR_PROTOCOLS.

Source:  MITRE      Last Modified:  10/04/2017      View Analysis Description

Quick Info

CVE Dictionary Entry:
CVE-2017-1000100
Original release date:
10/04/2017
Last revised:
11/13/2017
Source:
US-CERT/NIST

Impact

CVSS Severity (version 3.0):
CVSS v3 Base Score:
6.5 Medium
Vector:
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N (legend)
Impact Score:
3.6
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):
None
Availability (A):
None
CVSS Severity (version 2.0):
CVSS v2 Base Score:
4.3 MEDIUM
Vector:
(AV:N/AC:M/Au:N/C:P/I:N/A:N) (legend)
Impact Subscore:
2.9
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

References to Advisories, Solutions, and Tools

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Hyperlink Resource Type Source Name
http://www.debian.org/security/2017/dsa-3992 External Source DEBIAN DSA-3992
http://www.securityfocus.com/bid/100286 Third Party Advisory; VDB Entry External Source BID 100286
http://www.securitytracker.com/id/1039118 Third Party Advisory; VDB Entry External Source SECTRACK 1039118
https://curl.haxx.se/docs/adv_20170809B.html Patch; Vendor Advisory External Source CONFIRM https://curl.haxx.se/docs/adv_20170809B.html
https://security.gentoo.org/glsa/201709-14 Patch; Third Party Advisory; VDB Entry External Source GENTOO GLSA-201709-14
https://support.apple.com/HT208221 External Source CONFIRM https://support.apple.com/HT208221

Technical Details

Vulnerability Type (View All)

  • Information Leak / Disclosure (CWE-200)

Vulnerable software and versions Switch to CPE 2.2

Configuration 1
OR
cpe:2.3:a:haxx:libcurl:7.15.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.15.1:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.15.2:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.15.3:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.15.4:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.15.5:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.16.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.16.1:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.16.2:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.16.3:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.16.4:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.17.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.17.1:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.18.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.18.1:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.18.2:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.19.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.19.1:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.19.2:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.19.3:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.19.4:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.19.5:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.19.6:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.19.7:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.20.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.20.1:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.21.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.21.1:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.21.2:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.21.3:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.21.4:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.21.5:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.21.6:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.21.7:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.22.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.23.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.23.1:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.24.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.25.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.26.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.27.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.28.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.28.1:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.29.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.30.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.31.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.32.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.33.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.34.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.35.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.36.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.37.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.37.1:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.38.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.39:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.40.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.41.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.42.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.42.1:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.43.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.44.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.45.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.46.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.47.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.47.1:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.48.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.49.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.49.1:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.50.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.50.1:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.50.2:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.50.3:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.51.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.52.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.52.1:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.53.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.53.1:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.54.0:*:*:*:*:*:*:*
cpe:2.3:a:haxx:libcurl:7.54.1:*:*:*:*:*:*:*

Denotes Vulnerable Software
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Change History 3 change records found - show changes