Amazon Linux AMI update for openssl

Published: 2017-03-06

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2017-3731 CVE-2016-8610
CWE-ID	CWE-125 CWE-388
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) Out-of-bounds read

EUVDB-ID: #VU5420

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2017-3731

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause denial of service conditions.

The vulnerability exists due to out-of-bounds read in OpenSSL when processing truncated packets on 32-bit system using certain ciphers. A remote attacker can send a specially crafted truncated packet using CHACHA20/POLY1305 cipher for OpenSSL 1.1.0 or RC4-MD5 for 1.0.2 and trigger denial of service.

Successful exploitation of the vulnerability may allow an attacker to perform denial of service (DoS) attack against vulnerable system.

Mitigation

Update the affected packages.

i686:
    openssl-debuginfo-1.0.1k-15.99.amzn1.i686
    openssl-perl-1.0.1k-15.99.amzn1.i686
    openssl-1.0.1k-15.99.amzn1.i686
    openssl-static-1.0.1k-15.99.amzn1.i686
    openssl-devel-1.0.1k-15.99.amzn1.i686

src:
    openssl-1.0.1k-15.99.amzn1.src

x86_64:
    openssl-perl-1.0.1k-15.99.amzn1.x86_64
    openssl-debuginfo-1.0.1k-15.99.amzn1.x86_64
    openssl-1.0.1k-15.99.amzn1.x86_64
    openssl-devel-1.0.1k-15.99.amzn1.x86_64
    openssl-static-1.0.1k-15.99.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-2017-803.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) Denial of service

EUVDB-ID: #VU1083

Risk: Low

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2016-8610

CWE-ID: CWE-388 - Error Handling