VDB-248652 · CVE-2023-4233 · ZDI-23-1859

oFono SMS Decoder stack-based overflow

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.9	$0-$5k	0.00

Summaryinfo

A vulnerability described as critical has been identified in oFono. This affects an unknown function of the component SMS Decoder. The manipulation results in stack-based overflow. This vulnerability is reported as CVE-2023-4233. The attack can be launched remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical has been found in oFono (unknown version). Affected is an unknown code block of the component SMS Decoder. The manipulation with an unknown input leads to a stack-based overflow vulnerability. CWE is classifying the issue as CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

A flaw was found in ofono, an Open Source Telephony on Linux. A stack overflow bug is triggered within the sms_decode_address_field() function during the SMS PDU decoding. It is assumed that the attack scenario is accessible from a compromised modem, a malicious base station, or just SMS.

The weakness was disclosed 12/21/2023 as ZDI-23-1859. The advisory is shared for download at zerodayinitiative.com. This vulnerability is traded as CVE-2023-4233 since 08/08/2023. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 212203 (Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 : oFono vulnerabilities (USN-7141-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (212203). Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

oFono

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.1
VulDB Meta Temp Score: 7.9

VulDB Base Score: 8.1
VulDB Temp Score: 7.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 8.1
CNA Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 212203
Nessus Name: Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 : oFono vulnerabilities (USN-7141-1)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/08/2023 🔍
12/21/2023 +135 days 🔍
12/21/2023 +0 days 🔍
08/07/2025 +595 days 🔍

Sourcesinfo

Advisory: ZDI-23-1859
Status: Confirmed

CVE: CVE-2023-4233 (🔍)
GCVE (CVE): GCVE-0-2023-4233
GCVE (VulDB): GCVE-100-248652

Entryinfo

Created: 12/21/2023 08:00
Updated: 08/07/2025 17:15
Changes: 12/21/2023 08:00 (37), 12/10/2024 09:08 (17), 08/07/2025 17:15 (12)
Complete: 🔍
Cache ID: 216::103