Vulnerability identifier: #VU26997
Vulnerability risk: High
CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-502
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
AWS SAM
Web applications /
Modules and components for CMS
Vendor: Jenkins
Description
The vulnerability allows a remote user to execute arbitrary code on the target system.
The vulnerability exists due to affected software does not configure its YAML parser to prevent the instantiation of arbitrary types. A remote attacker user able to configure a job or control the contents of a previously configured "AWS SAM deploy application" build step’s YAML SAM template file (template.yaml or equivalent) file can pass specially crafted data to the application and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
AWS SAM: 1.2.2
External links
http://www.openwall.com/lists/oss-security/2020/04/16/4
http://jenkins.io/security/advisory/2020-04-16/#SECURITY-1736
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.