Security Resilience

CVE-2023-46977

Memory Safety in Totolink Lr1200Gb Firmware 9.1.0u.6619_b20230130

Public PoCMemory Safety
Published
31 October 2023
Modified
21 November 2024
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 0.087 95th percentile
Risk Priority 81 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-2023-46977 is a critical-severity Out-of-bounds Write (CWE-787) vulnerability in Totolink Lr1200Gb Firmware. Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Security Account Manager (T1003.002); ranked in the top 5% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

Deeper analysis AI-assisted summary

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

TOTOLINK LR1200GB firmware version V9.1.0u.6619_B20230130 contains a stack-based buffer overflow in the loginAuth function triggered by the password parameter. The flaw is tracked as CVE-2023-46977 and assigned CWE-787, with a CVSS 3.1 base score of 9.8 reflecting network-accessible, unauthenticated exploitation that can result in full compromise of confidentiality, integrity, and availability.

An unauthenticated remote attacker can supply an oversized password value to the device's web login interface and overwrite the stack, enabling arbitrary code execution or denial of service. No authentication or user interaction is required, and the attack can be launched over the network with low complexity.

The EPSS score for this CVE has remained flat at 0.1113 since disclosure, indicating moderate but stable exploitation interest with no observed upward trajectory after publication. Public technical details are limited to researcher reports hosted on GitHub that describe the crash and proof-of-concept input.

EU & UK References

Vulnerability Data

TOTOLINK LR1200GB V9.1.0u.6619_B20230130 was discovered to contain a stack overflow via the password parameter in the function loginAuth.

CWE(s)
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 →
T1003.004 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 →
T1003.008 /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 →
T1007 System Service Discovery Discovery
Adversaries may try to gather information about registered local system services.
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-2023-46557Same vendor: Totolink
CVE-2023-46558Same vendor: Totolink
CVE-2023-40042Same vendor: Totolink
CVE-2023-46540Same vendor: Totolink
CVE-2023-46546Same vendor: Totolink
CVE-2023-46551Same vendor: Totolink
CVE-2023-40041Same vendor: Totolink
CVE-2023-36955Same vendor: Totolink
CVE-2023-46545Same vendor: Totolink
CVE-2023-49418Same vendor: Totolink

Affected Assets

totolink
lr1200gb firmware
9.1.0u.6619_b20230130

Mitigating Controls

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.

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 scanning and recording can discover out-of-bounds write flaws so they can be remediated.

PR.PS-02 partial match
blocks

Patching or replacing vulnerable software directly eliminates known instances of this coding weakness.

PR.PS-06 partial match
blocks

Secure-development practices (static analysis, bounds checking, code review) are the primary means of preventing out-of-bounds writes.

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

References