Security Resilience

CVE-2023-35803

Memory Safety in Extremenetworks Iq Engine ≤ 10.6r2

Memory Safety
Published
04 October 2023
Modified
21 November 2024
Patch / advisory
View advisory
CVSS Score v3.1 9.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.016 75th percentile
Risk Priority 78 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2023-35803 is a critical-severity Classic Buffer Overflow (CWE-120) vulnerability in Extremenetworks Iq Engine. Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique NTDS (T1003.003); ranked in the top 25% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

IQ Engine versions prior to 10.6r2 running on Extreme Networks access-point devices contain a buffer overflow vulnerability tracked as CVE-2023-35803 and CWE-120. The flaw received a CVSS 3.1 base score of 9.8, reflecting a network-accessible attack that requires no authentication or user interaction and can impact confidentiality, integrity, and availability.

An unauthenticated remote attacker can send specially crafted network traffic to the affected acsd service, triggering the overflow to execute arbitrary code or crash the process. Because the vulnerability is reachable over the network without credentials, any internet-exposed or laterally reachable Extreme AP running a vulnerable IQ Engine release is exposed.

The vendor advisory SA-2023-067 states that the issue is resolved in IQ Engine 10.6r2 and later; administrators are advised to upgrade affected devices and to restrict management-plane access until patches can be applied. The associated EPSS score has remained flat at 0.0547 with no material post-disclosure increase observed.

EU & UK References

Vulnerability Data

IQ Engine before 10.6r2 on Extreme Network AP devices has a Buffer Overflow.

CWE(s)
CWE-120

Related Threats

MITRE ATT&CK Enterprise Techniques

T1003.003 NTDS Credential Access
Adversaries may attempt to access or create a copy of the Active Directory domain database in order to steal credential information, as well as obtain other information about domain members such as devices, users, and access rights.
attack.mitre.org →
T1003.004 LSA Secrets Credential Access
Adversaries with SYSTEM access to a host may attempt to access Local Security Authority (LSA) secrets, which can contain a variety of different credential materials, such as credentials for service accounts.
attack.mitre.org →
T1003.006 DCSync Credential Access
Adversaries may attempt to access credentials and other sensitive information by abusing a Windows Domain Controller's application programming interface (API)(Citation: Microsoft DRSR Dec 2017) (Citation: Microsoft GetNCCChanges) (Citati…
attack.mitre.org →
T1003.008 /etc/passwd and /etc/shadow Credential Access
Adversaries may attempt to dump the contents of <code>/etc/passwd</code> and <code>/etc/shadow</code> to enable offline password cracking.
attack.mitre.org →
T1010 Application Window Discovery Discovery
Adversaries may attempt to get a listing of open application windows.
attack.mitre.org →
T1012 Query Registry Discovery
Adversaries may interact with the Windows Registry to gather information about the system, configuration, and installed software.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2023-35802Same product: Extremenetworks Ap1130
CVE-2024-32230Shared CWE-120
CVE-2025-47394Shared CWE-120
CVE-2024-33278Shared CWE-120
CVE-2024-7849Shared CWE-120
CVE-2023-46847Shared CWE-120
CVE-2024-45970Shared CWE-120
CVE-2023-51886Shared CWE-120
CVE-2025-25676Shared CWE-120
CVE-2026-15565Shared CWE-120

Affected Assets

extremenetworks
iq engine
≤ 10.6r2 · ≤ 10.6r5

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V5.2.1

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SC-27 Platform-independent Applications
addresses: CWE-120

Platform-independent managed code eliminates the need for unchecked native buffer copies that are the root cause of classic buffer overflows.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

ID.RA-01 partial match
blocks

Vulnerability identification processes such as code review or scanning detect classic buffer overflows before exploitation.

PR.PS-02 partial match
blocks

Routine patching replaces vulnerable code containing unchecked buffer copies with corrected versions.

PR.PS-06 partial match
blocks

Secure development practices directly enforce bounds checking and input validation that prevent classic buffer overflows.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.5.14 Information transfer partial match
removes
A.5.15 Access control partial match
removes
A.5.16 Identity management partial match
removes
A.5.17 Authentication information partial match
removes
A.5.18 Access rights partial match
removes
A.8.10 Information deletion partial match
removes

References