Amazon Linux AMI 2: CVE-2022-2928: Security patch for dhcp (ALAS-2022-1874)
Description
In ISC DHCP 4.4.0 -> 4.4.3, ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16-P1, when the function option_code_hash_lookup() is called from add_option(), it increases the option's refcount field. However, there is not a corresponding call to option_dereference() to decrement the refcount field. The function add_option() is only used in server responses to lease query packets. Each lease query response calls this function for several options, so eventually, the reference counters could overflow and cause the server to abort.
Solution(s)
- amazon-linux-ami-2-upgrade-dhclient
- amazon-linux-ami-2-upgrade-dhcp
- amazon-linux-ami-2-upgrade-dhcp-common
- amazon-linux-ami-2-upgrade-dhcp-debuginfo
- amazon-linux-ami-2-upgrade-dhcp-devel
- amazon-linux-ami-2-upgrade-dhcp-libs
- Lightweight Endpoint Agent
- Live Dashboards
- Real Risk Prioritization
- IT-Integrated Remediation Projects
- Cloud, Virtual, and Container Assessment
- Integrated Threat Feeds
- Easy-to-Use RESTful API
- Automation-Assisted Patching
- Automated Containment
With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.
– Scott Cheney, Manager of Information Security, Sierra View Medical Center