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CVE-2021-43174— gzip transfer encoding caused out-of-memory crash

Quick assessment

Affected
NLnet Labs Routinator
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.

NLnet Labs Routinator是荷兰Stichting NLnet（Stichting Nlnet）实验室的一款使用Rust语言编写的RPKI（资源公钥基础设施）验证器。 NLnet Labs Routinator存在安全漏洞，该漏洞源于网络系统或产品对系统资源（如内存、磁盘空间、文件等）的管理不当。

AI Predicted 7.5 Difficulty: Easy EPSS 1.21% · P67

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2021-43174

Vulnerability Information
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Vulnerability Title
gzip transfer encoding caused out-of-memory crash
Source: CVE Program / CVE List V5
Vulnerability Description
NLnet Labs Routinator versions 0.9.0 up to and including 0.10.1, support the gzip transfer encoding when querying RRDP repositories. This encoding can be used by an RRDP repository to cause an out-of-memory crash in these versions of Routinator. RRDP uses XML which allows arbitrary amounts of white space in the encoded data. The gzip scheme compresses such white space extremely well, leading to very small compressed files that become huge when being decompressed for further processing, big enough that Routinator runs out of memory when parsing input data waiting for the next XML element.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1325
Source: CVE Program / CVE List V5
Vulnerability Title
NLnet Labs Routinator 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
NLnet Labs Routinator是荷兰Stichting NLnet（Stichting Nlnet）实验室的一款使用Rust语言编写的RPKI（资源公钥基础设施）验证器。 NLnet Labs Routinator存在安全漏洞，该漏洞源于网络系统或产品对系统资源（如内存、磁盘空间、文件等）的管理不当。
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
NLnet Labs Routinator unspecified ~ 0.10.1 -

II. Public POCs for CVE-2021-43174

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III. Intelligence Information for CVE-2021-43174

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Vendor Advisories for CVE-2021-43174 (1)

Other References for CVE-2021-43174 (1)

Same Patch Batch · NLnet Labs · 2021-11-09 · 3 CVEs total

CVE-2021-43172 Infinite length chain of RRDP repositories
CVE-2021-43173 Hanging RRDP request

IV. Related Vulnerabilities

Same product: Routinator
Same vendor: NLnet Labs
Same weakness: CWE-1325

V. Comments for CVE-2021-43174

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