CVE-2023-21635

Memory Safety in Qualcomm Aqt1000 Firmware

Memory Safety

Published

04 July 2023

Modified

21 November 2024

Patch / advisory

View advisory

CVSS Score v3.1 6.7

Click a component to see what it means

Raw vector

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS Score 0.0011 1th percentile

Risk Priority 46 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-2023-21635 is a medium-severity Classic Buffer Overflow (CWE-120) vulnerability in Qualcomm Aqt1000 Firmware. Its CVSS base score is 6.7 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Security Account Manager (T1003.002); ranked at the 1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2023-25802

Vulnerability Data

Memory Corruption in Data Network Stack & Connectivity when sim gets detected on telephony.

CWE(s): CWE-120 CWE-787

Related Threats

MITRE ATT&CK Enterprise Techniques

T1003.002 Security Account Manager Credential Access

Adversaries may attempt to extract credential material from the Security Account Manager (SAM) database either through in-memory techniques or through the Windows Registry where the SAM database is stored.

attack.mitre.org →

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 →

T1006 Direct Volume Access Stealth

Adversaries may directly access a volume to bypass file access controls and file system monitoring.

attack.mitre.org →

Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2023-21637Same product: Qualcomm Aqt1000

CVE-2023-21649Same product: Qualcomm Aqt1000

CVE-2023-21639Same product: Qualcomm Aqt1000

CVE-2023-28570Same product: Qualcomm Aqt1000

CVE-2023-28580Same product: Qualcomm Fastconnect 6900

CVE-2023-43548Same product: Qualcomm Aqt1000

CVE-2023-21650Same product: Qualcomm Aqt1000

CVE-2023-21634Same product: Qualcomm Aqt1000

CVE-2023-43540Same product: Qualcomm Aqt1000

CVE-2024-33042Same product: Qualcomm Aqt1000

Affected Assets

qualcomm

aqt1000 firmware

all versions

qualcomm

csrb31024 firmware

all versions

qualcomm

fastconnect 6200 firmware

all versions

qualcomm

fastconnect 6800 firmware

all versions

qualcomm

fastconnect 6900 firmware

all versions

qualcomm

qca6391 firmware

all versions

qualcomm

qca6420 firmware

all versions

qualcomm

qca6426 firmware

all versions

qualcomm

qca6430 firmware

all versions

qualcomm

qca6436 firmware

all versions

+39 more product configuration(s) — see NVD for full list

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.

SI-16 Memory Protection

addresses: CWE-787

Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.

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.7.2 Physical entry partial match

removes