Multiple vulnerabilities in Primavera Gateway

Published: 2021-01-20

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2020-11979 CVE-2020-5421
CWE-ID	CWE-264 CWE-20
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #2 is available.
Vulnerable software Subscribe	Primavera Gateway Server applications / Application servers
Vendor	Oracle

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU47428

Risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-11979

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to incorrect patch for vulnerability #VU27924 (CVE-2020-1945). Apache Ant 1.10.8 changed the permissions of temporary files it created so that only the current user was allowed to access them. Unfortunately the fixcrlf task deleted the temporary file and created a new one without said protection, effectively nullifying the effort. This would still allow an attacker to inject modified source files into the build process.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Primavera Gateway: 16.2.0 - 17.12.9

External links

http://www.oracle.com/security-alerts/cpujan2021.html

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Improper input validation

EUVDB-ID: #VU49739

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-5421

CWE-ID: CWE-20 - Improper input validation

Exploit availability: Yes