Amazon Linux AMI update for tar

1) NULL pointer dereference

EUVDB-ID: #VU18058

Risk: Low

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-9923

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 a NULL pointer dreference error in sparse.c in when parsing certain archives that have malformed extended headers. A remote attacker can perform a denial of service (DoS) attack.

Mitigation

Update the affected packages:

i686:
    tar-1.26-31.24.amzn1.i686
    tar-debuginfo-1.26-31.24.amzn1.i686

src:
    tar-1.26-31.24.amzn1.src

x86_64:
    tar-debuginfo-1.26-31.24.amzn1.x86_64
    tar-1.26-31.24.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

tar: before 1.26-31.24

CPE2.3

• cpe:2.3:o:amazon_web_services:amazon_linux_ami:*:*:*:*:*:*:*:*
• cpe:2.3:o:amazon_web_services:tar:*:*:*:*:*:amazon_linux_ami:*:*

External links

https://alas.aws.amazon.com/ALAS-2023-1755.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.