Amazon Linux AMI update for curl

Published: 2018-12-07

Risk	High
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2018-14618 CVE-2017-8816
CWE-ID	CWE-120 CWE-119
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	Amazon Linux AMI Operating systems & Components / Operating system
Vendor	Amazon Web Services

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Buffer overflow

EUVDB-ID: #VU14691

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2018-14618

CWE-ID: CWE-120 - Buffer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists on systems with a 32-bit size_t and that use more than 2 GB of memory for the password field due to a buffer overflow in Curl_ntlm_core_mk_nt_hash() in 'lib/curl_ntlm_core.c' when handling malicious input. A remote unauthenticated attacker can send a specially crafted NTLM authentication password, trigger memory corruption and execute arbitrary code with elevated privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected 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

Vulnerable software versions

Amazon Linux AMI: All versions

CPE2.3

cpe:2.3:o:amazon_web_services:amazon_linux_ami:*:*:*:*:*:*:*:*

External links

https://alas.aws.amazon.com/ALAS-2018-1112.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Buffer overflow

EUVDB-ID: #VU9458