Security readout for executives and security teams
Plain-English summary
A flaw in Open vSwitch 2.5.0 can let malformed IP traffic bypass access-control rules enforced by the switch. For organizations relying on OvS ACLs to segment workloads or tenants, this could undermine network policy. The source bundle does not provide CVSS, CWE, or confirmed patch details.
Executive priority
Prioritize environments where Open vSwitch ACLs protect sensitive networks or tenant boundaries. Business urgency is higher if version 2.5.0 is deployed in production. The absence of KEV evidence lowers confirmed exploitation urgency, but ACL bypass is a meaningful control failure.
Technical view
CVE-2016-10377 is an unsigned integer underflow in Open vSwitch 2.5.0, in lib/flow.c miniflow_extract. A malformed IP packet can trigger an out-of-bounds packet-buffer read and allow remote bypass of ACL enforcement by the switch.
Likely exposure
Exposure is most likely in environments running Open vSwitch 2.5.0 where OvS ACLs enforce segmentation, tenant isolation, or filtering. The provided affected-product metadata is incomplete, so version confirmation is necessary before scoping impact.
Exploitation context
The bundle describes remote ACL bypass via malformed IP packets. It does not cite active exploitation, public exploit availability, or inclusion in CISA KEV. Treat exploitation status as unconfirmed based on the supplied sources.
Researcher notes
The public details are narrow: affected version 2.5.0, vulnerable function miniflow_extract, malformed IP parsing, unsigned underflow, and ACL bypass impact. Affected-product metadata, CVSS, CWE, and remediation status are incomplete in the supplied bundle.
Mitigation direction
- Inventory Open vSwitch deployments and identify any running version 2.5.0.
- Review Open vSwitch guidance and the linked development thread for corrective release or patch status.
- Apply only vendor-confirmed upgrades or patches for affected Open vSwitch instances.
- Use upstream compensating controls where OvS ACL bypass would create material risk.
- Avoid relying solely on affected OvS ACLs until remediation is validated.
Validation and detection
- Confirm whether Open vSwitch 2.5.0 is present in production, staging, or appliance images.
- Map where OvS ACLs enforce segmentation or access-control boundaries.
- Review network telemetry for unusual malformed IP traffic, if available.
- After remediation, confirm deployed OvS versions no longer match affected 2.5.0.
- Validate ACL behavior with benign allowed and blocked traffic tests.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2016-10377 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://mail.openvswitch.org/pipermail/ovs-dev/2016-July/319503.htmlCVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.