CVE-2017-1000100 (GCVE-0-2017-1000100)
Vulnerability from cvelistv5
Published
2017-10-04 01:00
Modified
2024-08-05 21:53
Severity ?
CWE
  • n/a
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
https://support.apple.com/HT208221 x_refsource_CONFIRM
http://www.securityfocus.com/bid/100286 vdb-entry, x_refsource_BID
https://access.redhat.com/errata/RHSA-2018:3558 vendor-advisory, x_refsource_REDHAT
https://security.gentoo.org/glsa/201709-14 vendor-advisory, x_refsource_GENTOO
http://www.securitytracker.com/id/1039118 vdb-entry, x_refsource_SECTRACK
https://curl.haxx.se/docs/adv_20170809B.html x_refsource_CONFIRM
http://www.debian.org/security/2017/dsa-3992 vendor-advisory, x_refsource_DEBIAN
Impacted products
Vendor Product Version
n/a n/a Version: n/a
Show details on NVD website

To clipboard 

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