Gentoo update for polkit



| Updated: 2019-08-25
Risk Low
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2018-1116
CVE-2018-19788
CWE-ID CWE-285
CWE-77
Exploitation vector Local
Public exploit Public exploit code for vulnerability #2 is available.
Vulnerable software
 Gentoo Linux
Operating systems & Components / Operating system

Vendor Gentoo

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Improper authorization

EUVDB-ID: #VU13987

Risk: Low

CVSSv4.0: 4.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-1116

CWE-ID: CWE-285 - Improper Authorization

Exploit availability: No

Description

The vulnerability allows a local attacker to obtain potentially sensitive information or cause DoS condition on the target system.

The vulnerability exists due to improper implementation of the polkit_backend_interactive_authority_check_authorization function in the polkitd daemon. A local attacker can test for authentication and trigger authentication of unrelated processes owned by other users to access sensitive information or cause the service to crash.

Mitigation

Update the affected packages.
sys-auth/polkit to version: 0.115-r2

Vulnerable software versions

Gentoo Linux: All versions

CPE2.3 External links

https://security.gentoo.org/
https://security.gentoo.org/glsa/201908-14


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) Command injection

EUVDB-ID: #VU16313

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-2018-19788

CWE-ID: CWE-77 - Command injection

Exploit availability: Yes

Description

The vulnerability allows a local authenticated attacker to execute arbitrary commands on the target system.

The vulnerability exists due to PolicyKit's improper validation of permission requests for any low-privileged user with UID greater than INT_MAX, a constant in computer programming that defines what maximum value an integer variable can store, which equals to 2147483647 (in hexadecimal 0x7FFFFFFF). A local authenticated attacker with a uid greater than INT_MAX can execute any systemctl command.

Mitigation

Update the affected packages.
sys-auth/polkit to version: 0.115-r2

Vulnerable software versions

Gentoo Linux: All versions

CPE2.3 External links

https://security.gentoo.org/
https://security.gentoo.org/glsa/201908-14


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.



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