SB2018090640 - Integer overflow in xen (Alpine package)
Published: September 6, 2018
Security Bulletin ID
SB2018090640
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 security vulnerability.
1) Integer overflow (CVE-ID: CVE-2018-15471)
The vulnerability allows an adjacent attacker to gain elevated privileges on the target system.
The vulnerability exists in xenvif_set_hash_mapping in drivers/net/xen-netback/hash.c due to integer overflow when handling malicious input. An adjacent attacker can supply a malicious or buggy frontend request to set or change mapping of requests to request queues, cause the (usually privileged) backend to make out of bounds memory accesses and gain access to arbitrary data, cause the service to crash or gain elevated privileges.
Remediation
Install update from vendor's website.