This security advisory describes one medium risk vulnerability.
1) Permissions, Privileges, and Access Controls
Risk: Medium
CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C] [PCI]
CVE-ID: CVE-2021-32760
CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls
Exploit availability: No
Description
The vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to archive package allows chmod of file outside of unpack target directory. A remote attacker can deny access to the expected owner of the file, widen access to others, or set extended bits like setuid, setgid, and sticky.
Mitigation
Update the affected packages:
src:containerd-1.4.6-2.7.amzn1.srcx86_64:containerd-stress-1.4.6-2.7.amzn1.x86_64containerd-debuginfo-1.4.6-2.7.amzn1.x86_64containerd-1.4.6-2.7.amzn1.x86_64
Vulnerable software versions
Amazon Linux AMI: 2017.03
CPE
External links
https://alas.aws.amazon.com/ALAS-2021-1523.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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