This security advisory describes one medium risk vulnerability.
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]
Exploit availability: NoDescription
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to a symlink following issue when processing crafted images. A remote attacker can create a specially crafted image with symbolic link to a critical file on the system and overwrite it, when "umoci unpack" or "umoci raw unpack" is used.
Successful exploitation of this vulnerability may result in privilege escalation.Mitigation
Install updates from vendor's website.Vulnerable software versions
umoci: 0.4.0, 0.4.1, 0.4.2, 0.4.3, 0.4.4, 0.4.5, 0.4.6CPE
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.