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

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 6.5 MEDIUM
Vector: AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N (V3 legend)
Impact Score: 3.6
Exploitability Score: 2.8


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 v2.0 Severity and Metrics:

Base Score: 4.3 MEDIUM
Vector: (AV:N/AC:M/Au:N/C:P/I:N/A:N) (V2 legend)
Impact Subscore: 2.9
Exploitability Subscore: 8.6


Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (AU): None
Confidentiality (C): Partial
Integrity (I): None
Availability (A): None
Additional Information:
Victim must voluntarily interact with attack mechanism
Allows unauthorized disclosure of information

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to nvd@nist.gov.

Hyperlink Resource
http://www.debian.org/security/2017/dsa-3992
http://www.securityfocus.com/bid/100286 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1039118 Third Party Advisory VDB Entry
https://access.redhat.com/errata/RHSA-2018:3558
https://curl.haxx.se/docs/adv_20170809B.html Patch Vendor Advisory
https://security.gentoo.org/glsa/201709-14 Patch Third Party Advisory VDB Entry
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
Are we missing a CPE here? Please let us know.

Change History

4 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2017-1000100
NVD Published Date:
10/04/2017
NVD Last Modified:
11/13/2018