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Vulnerability Details : CVE-2017-1000100

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.
Publish Date : 2017-10-05 Last Update Date : 2018-11-13
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- CVSS Scores & Vulnerability Types

CVSS Score
4.3
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact None (There is no impact to the availability of the system.)
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) Obtain Information
CWE ID 200

- Products Affected By CVE-2017-1000100

# Product Type Vendor Product Version Update Edition Language
1 Application Haxx Libcurl 7.15.0 * * * Version Details Vulnerabilities
2 Application Haxx Libcurl 7.15.1 * * * Version Details Vulnerabilities
3 Application Haxx Libcurl 7.15.2 * * * Version Details Vulnerabilities
4 Application Haxx Libcurl 7.15.3 * * * Version Details Vulnerabilities
5 Application Haxx Libcurl 7.15.4 * * * Version Details Vulnerabilities
6 Application Haxx Libcurl 7.15.5 * * * Version Details Vulnerabilities
7 Application Haxx Libcurl 7.16.0 * * * Version Details Vulnerabilities
8 Application Haxx Libcurl 7.16.1 * * * Version Details Vulnerabilities
9 Application Haxx Libcurl 7.16.2 * * * Version Details Vulnerabilities
10 Application Haxx Libcurl 7.16.3 * * * Version Details Vulnerabilities
11 Application Haxx Libcurl 7.16.4 * * * Version Details Vulnerabilities
12 Application Haxx Libcurl 7.17.0 * * * Version Details Vulnerabilities
13 Application Haxx Libcurl 7.17.1 * * * Version Details Vulnerabilities
14 Application Haxx Libcurl 7.18.0 * * * Version Details Vulnerabilities
15 Application Haxx Libcurl 7.18.1 * * * Version Details Vulnerabilities
16 Application Haxx Libcurl 7.18.2 * * * Version Details Vulnerabilities
17 Application Haxx Libcurl 7.19.0 * * * Version Details Vulnerabilities
18 Application Haxx Libcurl 7.19.1 * * * Version Details Vulnerabilities
19 Application Haxx Libcurl 7.19.2 * * * Version Details Vulnerabilities
20 Application Haxx Libcurl 7.19.3 * * * Version Details Vulnerabilities
21 Application Haxx Libcurl 7.19.4 * * * Version Details Vulnerabilities
22 Application Haxx Libcurl 7.19.5 * * * Version Details Vulnerabilities
23 Application Haxx Libcurl 7.19.6 * * * Version Details Vulnerabilities
24 Application Haxx Libcurl 7.19.7 * * * Version Details Vulnerabilities
25 Application Haxx Libcurl 7.20.0 * * * Version Details Vulnerabilities
26 Application Haxx Libcurl 7.20.1 * * * Version Details Vulnerabilities
27 Application Haxx Libcurl 7.21.0 * * * Version Details Vulnerabilities
28 Application Haxx Libcurl 7.21.1 * * * Version Details Vulnerabilities
29 Application Haxx Libcurl 7.21.2 * * * Version Details Vulnerabilities
30 Application Haxx Libcurl 7.21.3 * * * Version Details Vulnerabilities
31 Application Haxx Libcurl 7.21.4 * * * Version Details Vulnerabilities
32 Application Haxx Libcurl 7.21.5 * * * Version Details Vulnerabilities
33 Application Haxx Libcurl 7.21.6 * * * Version Details Vulnerabilities
34 Application Haxx Libcurl 7.21.7 * * * Version Details Vulnerabilities
35 Application Haxx Libcurl 7.22.0 * * * Version Details Vulnerabilities
36 Application Haxx Libcurl 7.23.0 * * * Version Details Vulnerabilities
37 Application Haxx Libcurl 7.23.1 * * * Version Details Vulnerabilities
38 Application Haxx Libcurl 7.24.0 * * * Version Details Vulnerabilities
39 Application Haxx Libcurl 7.25.0 * * * Version Details Vulnerabilities
40 Application Haxx Libcurl 7.26.0 * * * Version Details Vulnerabilities
41 Application Haxx Libcurl 7.27.0 * * * Version Details Vulnerabilities
42 Application Haxx Libcurl 7.28.0 * * * Version Details Vulnerabilities
43 Application Haxx Libcurl 7.28.1 * * * Version Details Vulnerabilities
44 Application Haxx Libcurl 7.29.0 * * * Version Details Vulnerabilities
45 Application Haxx Libcurl 7.30.0 * * * Version Details Vulnerabilities
46 Application Haxx Libcurl 7.31.0 * * * Version Details Vulnerabilities
47 Application Haxx Libcurl 7.32.0 * * * Version Details Vulnerabilities
48 Application Haxx Libcurl 7.33.0 * * * Version Details Vulnerabilities
49 Application Haxx Libcurl 7.34.0 * * * Version Details Vulnerabilities
50 Application Haxx Libcurl 7.35.0 * * * Version Details Vulnerabilities
51 Application Haxx Libcurl 7.36.0 * * * Version Details Vulnerabilities
52 Application Haxx Libcurl 7.37.0 * * * Version Details Vulnerabilities
53 Application Haxx Libcurl 7.37.1 * * * Version Details Vulnerabilities
54 Application Haxx Libcurl 7.38.0 * * * Version Details Vulnerabilities
55 Application Haxx Libcurl 7.39 * * * Version Details Vulnerabilities
56 Application Haxx Libcurl 7.40.0 * * * Version Details Vulnerabilities
57 Application Haxx Libcurl 7.41.0 * * * Version Details Vulnerabilities
58 Application Haxx Libcurl 7.42.0 * * * Version Details Vulnerabilities
59 Application Haxx Libcurl 7.42.1 * * * Version Details Vulnerabilities
60 Application Haxx Libcurl 7.43.0 * * * Version Details Vulnerabilities
61 Application Haxx Libcurl 7.44.0 * * * Version Details Vulnerabilities
62 Application Haxx Libcurl 7.45.0 * * * Version Details Vulnerabilities
63 Application Haxx Libcurl 7.46.0 * * * Version Details Vulnerabilities
64 Application Haxx Libcurl 7.47.0 * * * Version Details Vulnerabilities
65 Application Haxx Libcurl 7.47.1 * * * Version Details Vulnerabilities
66 Application Haxx Libcurl 7.48.0 * * * Version Details Vulnerabilities
67 Application Haxx Libcurl 7.49.0 * * * Version Details Vulnerabilities
68 Application Haxx Libcurl 7.49.1 * * * Version Details Vulnerabilities
69 Application Haxx Libcurl 7.50.0 * * * Version Details Vulnerabilities
70 Application Haxx Libcurl 7.50.1 * * * Version Details Vulnerabilities
71 Application Haxx Libcurl 7.50.2 * * * Version Details Vulnerabilities
72 Application Haxx Libcurl 7.50.3 * * * Version Details Vulnerabilities
73 Application Haxx Libcurl 7.51.0 * * * Version Details Vulnerabilities
74 Application Haxx Libcurl 7.52.0 * * * Version Details Vulnerabilities
75 Application Haxx Libcurl 7.52.1 * * * Version Details Vulnerabilities
76 Application Haxx Libcurl 7.53.0 * * * Version Details Vulnerabilities
77 Application Haxx Libcurl 7.53.1 * * * Version Details Vulnerabilities
78 Application Haxx Libcurl 7.54.0 * * * Version Details Vulnerabilities
79 Application Haxx Libcurl 7.54.1 * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Haxx Libcurl 79

- References For CVE-2017-1000100

https://access.redhat.com/errata/RHSA-2018:3558
REDHAT RHSA-2018:3558
http://www.debian.org/security/2017/dsa-3992
DEBIAN DSA-3992
https://curl.haxx.se/docs/adv_20170809B.html CONFIRM
http://www.securityfocus.com/bid/100286
BID 100286 cURL/libcURL CVE-2017-1000100 Heap Based Buffer Overflow Vulnerability Release Date:2017-10-09
http://www.securitytracker.com/id/1039118
SECTRACK 1039118
https://security.gentoo.org/glsa/201709-14
GENTOO GLSA-201709-14
https://support.apple.com/HT208221 CONFIRM

- Metasploit Modules Related To CVE-2017-1000100

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


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