Amazon Linux AMI update for openssl

Published: 2016-09-22 | Updated: 2022-10-06

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2016-6304 CVE-2016-6305
CWE-ID	CWE-400 CWE-371
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Amazon Linux AMI Operating systems & Components / Operating system
Vendor	Amazon Web Services

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Resource exhaustion

EUVDB-ID: #VU646

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-6304

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper resource management in OCSP stapling implementation in OpenSSL. A remote attacker can multiple requests with a large OCSP Status Request extension and consume all available memory on the system.

Mitigation

Update the affected packages.

i686:
    openssl-devel-1.0.1k-15.95.amzn1.i686
    openssl-debuginfo-1.0.1k-15.95.amzn1.i686
    openssl-perl-1.0.1k-15.95.amzn1.i686
    openssl-static-1.0.1k-15.95.amzn1.i686
    openssl-1.0.1k-15.95.amzn1.i686

src:
    openssl-1.0.1k-15.95.amzn1.src

x86_64:
    openssl-static-1.0.1k-15.95.amzn1.x86_64
    openssl-perl-1.0.1k-15.95.amzn1.x86_64
    openssl-debuginfo-1.0.1k-15.95.amzn1.x86_64
    openssl-devel-1.0.1k-15.95.amzn1.x86_64
    openssl-1.0.1k-15.95.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2016-749.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: #VU645

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-6305

CWE-ID: CWE-371 - State Issues