YASM 1.3.0.86.g9def nasm-pp.c do_directive use after free

CVSS Meta Temp Score
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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.
4.3$0-$5k0.00

Summaryinfo

A vulnerability was found in YASM 1.3.0.86.g9def. It has been declared as problematic. The impacted element is the function do_directive of the file modules/preprocs/nasm/nasm-pp.c. Such manipulation leads to use after free. This vulnerability is uniquely identified as CVE-2023-49554. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability was found in YASM 1.3.0.86.g9def. It has been rated as problematic. Affected by this issue is the function do_directive of the file modules/preprocs/nasm/nasm-pp.c. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is availability. CVE summarizes:

Use After Free vulnerability in YASM 1.3.0.86.g9def allows a remote attacker to cause a denial of service via the do_directive function in the modules/preprocs/nasm/nasm-pp.c component.

The weakness was disclosed 01/03/2024 as 249. The advisory is available at github.com. This vulnerability is handled as CVE-2023-49554 since 11/27/2023. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 06/18/2025).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.3

VulDB Base Score: 3.1
VulDB Temp Score: 3.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

11/27/2023 🔍
01/03/2024 +37 days 🔍
01/03/2024 +0 days 🔍
06/18/2025 +532 days 🔍

Sourcesinfo

Product: github.com

Advisory: 249
Status: Confirmed

CVE: CVE-2023-49554 (🔍)
GCVE (CVE): GCVE-0-2023-49554
GCVE (VulDB): GCVE-100-249542

Entryinfo

Created: 01/03/2024 09:13
Updated: 06/18/2025 20:34
Changes: 01/03/2024 09:13 (39), 01/23/2024 09:02 (11), 06/18/2025 20:34 (16)
Complete: 🔍
Cache ID: 216::103

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