Privilege escalation in xen (Alpine package)
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2017-8903 |
| CWE-ID | CWE-264 |
| Exploitation vector | Local |
| Public exploit | N/A |
| Vulnerable software Subscribe |
xen (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) Privilege escalation
EUVDB-ID: #VU6843
Risk: Low
CVSSv3.1: 5.2 [CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-8903
CWE-ID:
CWE-264 - Permissions, Privileges, and Access Controls
Exploit availability: No
DescriptionThe vulnerability allows a local attacker to gain elevated privileges on the target system.
The weakness exists due to an error in the GNTTABOP_transfer operation. A local attacker can use a specially crafted IRET hypercall, gain write access to kernel page tables and execute arbitrary code on the host OS with elevated privileges.
Successful exploitation of the vulnerability results in privilege escalation.
Install update from vendor's website.
Vulnerable software versionsxen (Alpine package): 4.5.0-r0 - 4.5.5-r1
External linkshttp://git.alpinelinux.org/aports/commit/?id=2e37a309d6db43d6ec74cb76058f38a9060be22a
http://git.alpinelinux.org/aports/commit/?id=379c5299d65499022d1f9338b6042ef5f6008b52
http://git.alpinelinux.org/aports/commit/?id=c12d6f2d2fc4ffae930a97f25ade837b85e48808
http://git.alpinelinux.org/aports/commit/?id=7f989732c4db2c7fa917bf58b0dd9b931dc2b9a5
http://git.alpinelinux.org/aports/commit/?id=231b8648691a0c1f456d8f87e56bd6480fb4a0bc
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.
