Amazon Linux AMI update for bind

1) Use-after-free error

EUVDB-ID: #VU10030

Risk: Low

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-3145

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists due to improper sequencing cleanup operations on upstream recursion fetch contexts. A remote attacker can trigger use-after-free error that may lead to assertion failure and cause the BIND name server (named) process to crash.

Successful exploitation of the vulnerability results in denial of service.

Mitigation

Update the affected packages.

i686:
    bind-sdb-9.8.2-0.62.rc1.57.amzn1.i686
    bind-chroot-9.8.2-0.62.rc1.57.amzn1.i686
    bind-devel-9.8.2-0.62.rc1.57.amzn1.i686
    bind-debuginfo-9.8.2-0.62.rc1.57.amzn1.i686
    bind-9.8.2-0.62.rc1.57.amzn1.i686
    bind-utils-9.8.2-0.62.rc1.57.amzn1.i686
    bind-libs-9.8.2-0.62.rc1.57.amzn1.i686

src:
    bind-9.8.2-0.62.rc1.57.amzn1.src

x86_64:
    bind-9.8.2-0.62.rc1.57.amzn1.x86_64
    bind-debuginfo-9.8.2-0.62.rc1.57.amzn1.x86_64
    bind-libs-9.8.2-0.62.rc1.57.amzn1.x86_64
    bind-utils-9.8.2-0.62.rc1.57.amzn1.x86_64
    bind-chroot-9.8.2-0.62.rc1.57.amzn1.x86_64
    bind-sdb-9.8.2-0.62.rc1.57.amzn1.x86_64
    bind-devel-9.8.2-0.62.rc1.57.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-2018-954.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.