Security restrictions bypass in polkit (Alpine package)
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2019-6133 |
| CWE-ID | CWE-264 |
| Exploitation vector | Network |
| Public exploit | Public exploit code for vulnerability #1 is available. |
| Vulnerable software Subscribe |
polkit (Alpine package) Operating systems & Components / Operating system package or component |
| Vendor | Alpine Linux Development Team |
Security Bulletin
This security bulletin contains one low risk vulnerability.
1) Security restrictions bypass
EUVDB-ID: #VU16966
Risk: Low
CVSSv3.1: 6.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C]
CVE-ID: CVE-2019-6133
CWE-ID:
CWE-264 - Permissions, Privileges, and Access Controls
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to bypass security restrictions on the target system.
The vulnerability exists due to fork() is not atomic, and therefore authorization decisions are improperly cached, related to lack of uid checking in polkitbackend/polkitbackendinteractiveauthority.c. A remote unauthenticated attacker can bypass the "start time" protection mechanism
MitigationInstall update from vendor's website.
Vulnerable software versionspolkit (Alpine package): 0.105-r8
External linkshttp://git.alpinelinux.org/aports/commit/?id=117cfaf0240976b412ebfb6fa8233e9283d113a4
http://git.alpinelinux.org/aports/commit/?id=5573e7cd16ade1235291cdb9ab48a9e614ac59c3
http://git.alpinelinux.org/aports/commit/?id=982c3b6a30eca5ff7cf8d069f774084391a699dc
Q & A
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. However, proof of concept for this vulnerability is available.
