Amazon Linux AMI update for 389-ds-base

1) Brute-force attack

EUVDB-ID: #VU8118

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-7551

CWE-ID: CWE-307 - Improper Restriction of Excessive Authentication Attempts

Exploit availability: No

Description

The vulnerability allows remote users to perform brute-force attack on the target system.

The vulnerability exists due to different return codes returned on password attempts. A remote attacker can perform password brute-force attacks during account lockout and obtain valid user's credentials.

Successful exploitation of this vulnerability may result in unauthorized access to the system.

Mitigation

Update the affected packages.

i686:
    389-ds-base-libs-1.3.6.1-19.51.amzn1.i686
    389-ds-base-devel-1.3.6.1-19.51.amzn1.i686
    389-ds-base-1.3.6.1-19.51.amzn1.i686
    389-ds-base-snmp-1.3.6.1-19.51.amzn1.i686
    389-ds-base-debuginfo-1.3.6.1-19.51.amzn1.i686

src:
    389-ds-base-1.3.6.1-19.51.amzn1.src

x86_64:
    389-ds-base-libs-1.3.6.1-19.51.amzn1.x86_64
    389-ds-base-snmp-1.3.6.1-19.51.amzn1.x86_64
    389-ds-base-devel-1.3.6.1-19.51.amzn1.x86_64
    389-ds-base-debuginfo-1.3.6.1-19.51.amzn1.x86_64
    389-ds-base-1.3.6.1-19.51.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-2017-905.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.