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CVE-2025-29917— Suricata decode_base64: signature can do large memory allocation

Quick assessment

Affected
OISF suricata
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Suricata是Open Information Security基金会的一个网络IDS、IPS和NSM引擎。 Suricata存在安全漏洞，该漏洞源于decode_base64关键字设置不当，可能导致大内存分配。

CVSS 6.2 · Medium EPSS 0.27% · P17

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2025-29917

Vulnerability Information
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Vulnerability Title
Suricata decode_base64: signature can do large memory allocation
Source: CVE Program / CVE List V5
Vulnerability Description
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. The bytes setting in the decode_base64 keyword is not properly limited. Due to this, signatures using the keyword and setting can cause large memory allocations of up to 4 GiB per thread. This vulnerability is fixed in 7.0.9.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
Suricata 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Suricata是Open Information Security基金会的一个网络IDS、IPS和NSM引擎。 Suricata存在安全漏洞，该漏洞源于decode_base64关键字设置不当，可能导致大内存分配。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
OISF suricata < 7.0.9 -

II. Public POCs for CVE-2025-29917

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III. Intelligence Information for CVE-2025-29917

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Same Patch Batch · OISF · 2025-04-10 · 4 CVEs total

CVE-2025-29915 7.5 HIGH Suricata af-packet: defrag option can lead to truncated packets affecting visibility
CVE-2025-29916 6.2 MEDIUM Suricata datasets: ruleset declared settings can lead to resource starvation
CVE-2025-29918 6.2 MEDIUM Suricata pcre: negated pcr can cause infinite loop

IV. Related Vulnerabilities

Same product: suricata
Same vendor: OISF
Same weakness: CWE-770

V. Comments for CVE-2025-29917

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