ALAS-2018-1112


Amazon Linux AMI Security Advisory: ALAS-2018-1112
Advisory Release Date: 2018-12-07 00:55 Pacific
Severity: Low
References: CVE-2018-14618 

Issue Overview:

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 .)(CVE-2018-14618 )


Affected Packages:

curl


Issue Correction:
Run yum update curl to update your system.

New Packages:
i686:
    libcurl-devel-7.53.1-16.85.amzn1.i686
    curl-debuginfo-7.53.1-16.85.amzn1.i686
    libcurl-7.53.1-16.85.amzn1.i686
    curl-7.53.1-16.85.amzn1.i686

src:
    curl-7.53.1-16.85.amzn1.src

x86_64:
    curl-7.53.1-16.85.amzn1.x86_64
    libcurl-devel-7.53.1-16.85.amzn1.x86_64
    libcurl-7.53.1-16.85.amzn1.x86_64
    curl-debuginfo-7.53.1-16.85.amzn1.x86_64