CVE-2017-1000100
Vulnerability from cvelistv5
Published
2017-10-04 01:00
Modified
2024-08-05 21:53
Severity ?
Summary
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.
References
cve@mitre.orghttp://www.debian.org/security/2017/dsa-3992
cve@mitre.orghttp://www.securityfocus.com/bid/100286Third Party Advisory, VDB Entry
cve@mitre.orghttp://www.securitytracker.com/id/1039118Third Party Advisory, VDB Entry
cve@mitre.orghttps://access.redhat.com/errata/RHSA-2018:3558
cve@mitre.orghttps://curl.haxx.se/docs/adv_20170809B.htmlPatch, Vendor Advisory
cve@mitre.orghttps://security.gentoo.org/glsa/201709-14Patch, Third Party Advisory, VDB Entry
cve@mitre.orghttps://support.apple.com/HT208221
Impacted products
n/an/a
Show details on NVD website

To clipboard 

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Party Advisory\",\"VDB Entry\"]},{\"url\":\"http://www.securitytracker.com/id/1039118\",\"source\":\"cve@mitre.org\",\"tags\":[\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"https://access.redhat.com/errata/RHSA-2018:3558\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://curl.haxx.se/docs/adv_20170809B.html\",\"source\":\"cve@mitre.org\",\"tags\":[\"Patch\",\"Vendor Advisory\"]},{\"url\":\"https://security.gentoo.org/glsa/201709-14\",\"source\":\"cve@mitre.org\",\"tags\":[\"Patch\",\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"https://support.apple.com/HT208221\",\"source\":\"cve@mitre.org\"}]}}"
  }
}


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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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