YASM 1.3.0.86.g9def libyasm/expr.c expr_delete_term denial of service

CVSS Meta Temp Score
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CTI Interest Score
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4.9$0-$5k0.00

Summaryinfo

A vulnerability was found in YASM 1.3.0.86.g9def. It has been rated as problematic. This vulnerability affects the function expr_delete_term in the library libyasm/expr.c. This manipulation causes denial of service. This vulnerability is handled as CVE-2023-49556. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as problematic was found in YASM 1.3.0.86.g9def. Affected by this vulnerability is the function expr_delete_term in the library libyasm/expr.c. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. The summary by CVE is:

Buffer Overflow vulnerability in YASM 1.3.0.86.g9def allows a remote attacker to cause a denial of service via the expr_delete_term function in the libyasm/expr.c component.

The weakness was released 01/03/2024 as 250. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2023-49556 since 11/27/2023. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 250266 (Linux Distros Unpatched Vulnerability : CVE-2023-49556), which helps to determine the existence of the flaw in a target environment.

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

The vulnerability is also documented in the vulnerability database at Tenable (250266). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.9
VulDB Meta Temp Score: 4.9

VulDB Base Score: 4.3
VulDB Temp Score: 4.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Denial of service
CWE: CWE-404
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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Nessus ID: 250266
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2023-49556

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 🔍
08/15/2025 +590 days 🔍

Sourcesinfo

Product: github.com

Advisory: 250
Status: Confirmed

CVE: CVE-2023-49556 (🔍)
GCVE (CVE): GCVE-0-2023-49556
GCVE (VulDB): GCVE-100-249571

Entryinfo

Created: 01/03/2024 09:29
Updated: 08/15/2025 16:42
Changes: 01/03/2024 09:29 (39), 01/23/2024 11:20 (11), 06/03/2025 19:13 (16), 08/15/2025 16:42 (2)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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