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LIN9-7472 : Security Advisory - curl - CVE-2018-14618

Created: Sep 16, 2018    Updated: Jan 21, 2019
Resolved Date: Sep 19, 2018
Found In Version:
Fix Version:
Severity: Standard
Applicable for: Wind River Linux 9
Component/s: Userspace


curl before version 7.61.1 is vulnerable to a buffer overrun in the NTLM authentication code. 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.)

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