SB2017102505 - Null pointer dereference in xen (Alpine package)
Published: October 25, 2017
Security Bulletin ID
SB2017102505
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Adjecent network
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Null pointer dereference (CVE-ID: CVE-2017-14318)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows an adjacent attacker to gain elevated privileges or cause DoS condition on the host system.
The weakness exists due to NULL pointer deference in certain GNTTABOP_cache_flush grant table operations. If exploited on x86-based PV guest systems without SMAP enabled, an adjacent attacker can gain elevated privileges. If exploited on ARM-based guest systems and x86-based PV guest systems that have SMAP enabled, an adjacent attacker can cause the host system to crash.
Remediation
Install update from vendor's website.
References
- https://git.alpinelinux.org/aports/commit/?id=9616306fb5e4218fa8039e04e2f98e34a36fdf74
- https://git.alpinelinux.org/aports/commit/?id=902758ce76df95964c0d12e7cea24d7013cecf81
- https://git.alpinelinux.org/aports/commit/?id=9e8bfa9f6da89fa610692d159505391749ab3bdf
- https://git.alpinelinux.org/aports/commit/?id=37a17c61fd9573ea51e77597bf4cd57b127d48ea
- https://git.alpinelinux.org/aports/commit/?id=ccc49b6e6d7e85267b83fd27bbbc66cd4c17417a