Amazon Linux AMI update for nss



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2017-7502
CWE-ID CWE-476
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 one medium risk vulnerability.

1) NULL pointer dereference

EUVDB-ID: #VU6841

Risk: Medium

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

CVE-ID: CVE-2017-7502

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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

The vulnerability exists due to NULL pointer dereference error in NSS since 3.24.0 when processing empty SSLv2 messages, received from clients. A remote attacker can send specially crafted request to vulnerable service and perform denial of service attack.

Mitigation

Update the affected packages.

i686:
    nss-debuginfo-3.28.4-1.2.79.amzn1.i686
    nss-sysinit-3.28.4-1.2.79.amzn1.i686
    nss-devel-3.28.4-1.2.79.amzn1.i686
    nss-pkcs11-devel-3.28.4-1.2.79.amzn1.i686
    nss-tools-3.28.4-1.2.79.amzn1.i686
    nss-3.28.4-1.2.79.amzn1.i686

src:
    nss-3.28.4-1.2.79.amzn1.src

x86_64:
    nss-debuginfo-3.28.4-1.2.79.amzn1.x86_64
    nss-3.28.4-1.2.79.amzn1.x86_64
    nss-pkcs11-devel-3.28.4-1.2.79.amzn1.x86_64
    nss-sysinit-3.28.4-1.2.79.amzn1.x86_64
    nss-tools-3.28.4-1.2.79.amzn1.x86_64
    nss-devel-3.28.4-1.2.79.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

CPE2.3 External links

https://alas.aws.amazon.com/ALAS-2017-848.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.



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