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VuXML IDDescription
f4d638b9-e6e5-4dbe-8c70-571dbc116174curl -- password overflow vulnerability

curl security problems:

CVE-2018-14618: NTLM password overflow via integer overflow

The internal function Curl_ntlm_core_mk_nt_hash multiplies the length of the password by two (SUM) to figure out how large temporary storage area to allocate from the heap.

The length value is then subsequently used to iterate over the password and generate output into the allocated storage buffer. On systems with a 32 bit size_t, the math to calculate SUM triggers an integer overflow when the password length exceeds 2GB (2^31 bytes). This integer overflow usually causes a very small buffer to actually get allocated instead of the intended very huge one, making the use of that buffer end up in a heap buffer overflow.

This bug is almost identical to CVE-2017-8816.


Discovery 2018-09-05
Entry 2018-09-05
Modified 2019-08-03
curl
>= 7.15.4 lt 7.61.1

linux-c7-curl
< 7.29.0_6

https://curl.haxx.se/docs/security.html
https://curl.haxx.se/docs/CVE-2018-14618.html
CVE-2018-14618