Amazon Linux AMI update for nss

1) Man-in-the-middle attack

EUVDB-ID: #VU15735

Risk: Low

CVSSv3.1: 3.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-12384

CWE-ID: CWE-300 - Channel Accessible by Non-Endpoint ('Man-in-the-Middle')

Exploit availability: No

Description

The vulnerability allows a remote attacker to conduct man-in-the-middle attack on the target system.

The weakness exists due to ServerHello.random is all zero when handling a v2-compatible ClientHello. A remote attacker can use man-in-the-middle techniques to conduct passive replay attack and obtain potentially sensitive information.

Mitigation

Update the affected packages:

i686:
    nss-devel-3.36.0-5.82.amzn1.i686
    nss-sysinit-3.36.0-5.82.amzn1.i686
    nss-debuginfo-3.36.0-5.82.amzn1.i686
    nss-3.36.0-5.82.amzn1.i686
    nss-tools-3.36.0-5.82.amzn1.i686
    nss-pkcs11-devel-3.36.0-5.82.amzn1.i686

src:
    nss-3.36.0-5.82.amzn1.src

x86_64:
    nss-debuginfo-3.36.0-5.82.amzn1.x86_64
    nss-3.36.0-5.82.amzn1.x86_64
    nss-sysinit-3.36.0-5.82.amzn1.x86_64
    nss-tools-3.36.0-5.82.amzn1.x86_64
    nss-devel-3.36.0-5.82.amzn1.x86_64
    nss-pkcs11-devel-3.36.0-5.82.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2018-1095.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.