CVE-2020-14377
📋 TL;DR
This vulnerability in DPDK allows an attacker in a virtual machine to read significant amounts of host memory due to a buffer over-read. The flaw exists in DPDK versions before 18.11.10 and 19.11.5 where attacker-controlled parameters are not validated. This affects systems using DPDK for high-performance packet processing in virtualized environments.
💻 Affected Systems
- Data Plane Development Kit (DPDK)
📦 What is this software?
Leap by Opensuse
Leap by Opensuse
Ubuntu Linux by Canonical
⚠️ Risk & Real-World Impact
Worst Case
An attacker in a VM can read sensitive host memory including credentials, encryption keys, and other VM data, potentially leading to full host compromise and data exfiltration.
Likely Case
Information disclosure from host memory to malicious VM, potentially exposing sensitive data from other VMs or the host system.
If Mitigated
Limited impact with proper network segmentation and VM isolation, though memory reading capability remains.
🎯 Exploit Status
Exploitation requires attacker to have control of a VM and knowledge of DPDK usage. No public exploit code found in references.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 18.11.10 or 19.11.5 and later
Vendor Advisory: http://www.openwall.com/lists/oss-security/2021/01/04/1
Restart Required: Yes
Instructions:
1. Identify DPDK version. 2. Upgrade to DPDK 18.11.10+ or 19.11.5+. 3. Recompile applications using DPDK. 4. Restart affected services/VMs.
🔧 Temporary Workarounds
Disable vulnerable DPDK features
linuxIf possible, disable or restrict DPDK memory sharing features between host and VMs
VM isolation
allIsolate potentially untrusted VMs from those using DPDK
🧯 If You Can't Patch
- Implement strict network segmentation between VMs and limit VM-to-VM communication
- Monitor for unusual memory access patterns and implement strict VM resource limits
🔍 How to Verify
Check if Vulnerable:
Check DPDK version: dpdk-version or examine package version. If version is <18.11.10 or <19.11.5, system is vulnerable.Check Version:
dpdk-version || rpm -q dpdk || dpkg -l | grep dpdkVerify Fix Applied:
Verify DPDK version is 18.11.10+ or 19.11.5+ and applications have been recompiled with updated library.📡 Detection & Monitoring
Log Indicators:
- Unusual memory access patterns in VM logs
- DPDK error messages related to memory boundaries
Network Indicators:
- Abnormal memory-related traffic between VMs and host
SIEM Query:
source="dpdk" AND (error OR memory OR boundary) OR source="vm" AND action="memory_read"🔗 References
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00004.html
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00006.html
- http://www.openwall.com/lists/oss-security/2021/01/04/1
- http://www.openwall.com/lists/oss-security/2021/01/04/2
- http://www.openwall.com/lists/oss-security/2021/01/04/5
- https://bugzilla.redhat.com/show_bug.cgi?id=1879472
- https://usn.ubuntu.com/4550-1/
- https://www.openwall.com/lists/oss-security/2020/09/28/3
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00004.html
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00006.html
- http://www.openwall.com/lists/oss-security/2021/01/04/1
- http://www.openwall.com/lists/oss-security/2021/01/04/2
- http://www.openwall.com/lists/oss-security/2021/01/04/5
- https://bugzilla.redhat.com/show_bug.cgi?id=1879472
- https://usn.ubuntu.com/4550-1/
- https://www.openwall.com/lists/oss-security/2020/09/28/3
