Amazon Linux AMI update for nss

1) Use-after-free

EUVDB-ID: #VU8634

Risk: High

CVSSv3.1: 8.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-7805

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to use-after-free error during TLS 1.2 exchanges. A remote unauthenticated attacker can create a specially crafted web server, trick the victim into visiting it and execute arbitrary code on the target system.

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

Mitigation

Update the affected packages.

i686:
    nss-tools-3.28.4-12.80.amzn1.i686
    nss-debuginfo-3.28.4-12.80.amzn1.i686
    nss-3.28.4-12.80.amzn1.i686
    nss-sysinit-3.28.4-12.80.amzn1.i686
    nss-pkcs11-devel-3.28.4-12.80.amzn1.i686
    nss-devel-3.28.4-12.80.amzn1.i686

src:
    nss-3.28.4-12.80.amzn1.src

x86_64:
    nss-pkcs11-devel-3.28.4-12.80.amzn1.x86_64
    nss-devel-3.28.4-12.80.amzn1.x86_64
    nss-3.28.4-12.80.amzn1.x86_64
    nss-debuginfo-3.28.4-12.80.amzn1.x86_64
    nss-sysinit-3.28.4-12.80.amzn1.x86_64
    nss-tools-3.28.4-12.80.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2017-911.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.