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CVE-2017-15118: A stack-based buffer overflow vulnerability was found in NBD server implementation in qemu before 2.11 allo...

A stack-based buffer overflow vulnerability was found in NBD server implementation in qemu before 2.11 allowing a client to request an export name of size up to 4096 bytes, which in fact should be limited to 256 bytes, causing an out-of-bounds stack write in the qemu process. If NBD server requires TLS, the attacker cannot trigger the buffer overflow without first successfully negotiating TLS.

HighCVSS 8.3Not KEV-listedUpdated
Glexia's TakeAutomated analysis

Security readout for executives and security teams

This flaw affects QEMU's NBD server. A remote client could send an overly long export name and corrupt stack memory in the QEMU process. Business urgency is highest where QEMU NBD services are reachable by untrusted clients or exposed across networks. Likely exposure is limited to systems running affected QEMU versions with the NBD server enabled. Risk increases when NBD endpoints are network-reachable or accept untrusted clients. The provided data does not prove all QEMU deployments are affected. Treat as high priority for virtualization or backup environments using QEMU NBD. Patch exposed or untrusted-facing services first. Internal-only, disabled, or TLS-restricted deployments still need validation, but urgency depends on reachable attack surface. Mitigation focus: Apply vendor updates from QEMU, Red Hat, Ubuntu, or your distribution maintainer.; Upgrade affected QEMU deployments to a fixed version per vendor guidance.; Restrict NBD server access to trusted networks and clients..

Prepared

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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ATT&CK lookup starting points

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cwe · low confidence lookup

CWE-121: Exact CWE lookup

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cve · low confidence lookup

CVE-2017-15118 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
8.3 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L

Official CVE source material

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.

1CVSS vectors
0Timeline events
0ADP providers
6Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
8.3CVSS 3.0HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L3.93.7Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

8.3High
CVSS 3.0 vector shape for CVE-2017-15118Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
QEMUQemu2.11Listed
Weakness

CWE details

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-121 · source CWE mapping

Stack-based Buffer Overflow

Stack-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.