Amazon Linux AMI update for bind

1) Buffer overflow

EUVDB-ID: #VU50780

Risk: High

CVSSv4.0: 7.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2020-8625

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error within the SPNEGO implementation in the GSS-TSIG extension. A remote attacker can send a specially crafted DNS request to the server, trigger memory corruption 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:
    bind-chroot-9.8.2-0.68.rc1.86.amzn1.i686
    bind-devel-9.8.2-0.68.rc1.86.amzn1.i686
    bind-9.8.2-0.68.rc1.86.amzn1.i686
    bind-sdb-9.8.2-0.68.rc1.86.amzn1.i686
    bind-utils-9.8.2-0.68.rc1.86.amzn1.i686
    bind-libs-9.8.2-0.68.rc1.86.amzn1.i686
    bind-debuginfo-9.8.2-0.68.rc1.86.amzn1.i686

src:
    bind-9.8.2-0.68.rc1.86.amzn1.src

x86_64:
    bind-debuginfo-9.8.2-0.68.rc1.86.amzn1.x86_64
    bind-libs-9.8.2-0.68.rc1.86.amzn1.x86_64
    bind-utils-9.8.2-0.68.rc1.86.amzn1.x86_64
    bind-devel-9.8.2-0.68.rc1.86.amzn1.x86_64
    bind-chroot-9.8.2-0.68.rc1.86.amzn1.x86_64
    bind-sdb-9.8.2-0.68.rc1.86.amzn1.x86_64
    bind-9.8.2-0.68.rc1.86.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-2021-1485.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.