Cloud Foundry Foundation cflinuxfs3 update for Bash



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-18276
CWE-ID CWE-273
Exploitation vector Local
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
 cflinuxfs3
Other software / Other software solutions

Vendor Cloud Foundry Foundation

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Improper Check for Dropped Privileges

EUVDB-ID: #VU24690

Risk: Low

CVSSv4.0: 7.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2019-18276

CWE-ID: CWE-273 - Improper Check for Dropped Privileges

Exploit availability: Yes

Description

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

The vulnerability exists in "disable_priv_mode()" function in shell.c due to the affected software attempts to drop privileges but does not check or incorrectly checks to see if the drop succeeded. A local user with command execution in the shell can use "enable -f" for runtime loading of a new builtin, which can be a shared object that calls setuid() and therefore regains privileges.

Mitigation

Install update from vendor's website.

Vulnerable software versions

cflinuxfs3: 0.200.0 - 0.286.0

CPE2.3 External links

https://github.com/cloudfoundry/cflinuxfs3/releases/tag/0.287.0


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. However, proof of concept for this vulnerability is available.



###SIDEBAR###