uClibc/uClibc-ng up to 1.0.38 Domain Name injection

Summaryinfo

A vulnerability was found in uClibc and uClibc-ng up to 1.0.38. It has been rated as critical. The impacted element is the function gethostbyname/getaddrinfo/gethostbyaddr/getnameinfo of the component Domain Name Handler. Performing a manipulation results in injection. This vulnerability is identified as CVE-2021-43523. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, was found in uClibc and uClibc-ng up to 1.0.38. This affects the function gethostbyname/getaddrinfo/gethostbyaddr/getnameinfo of the component Domain Name Handler. The manipulation with an unknown input leads to a injection vulnerability. CWE is classifying the issue as CWE-74. The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was released 11/10/2021. The advisory is shared at openwall.com. This vulnerability is uniquely identified as CVE-2021-43523 since 11/08/2021. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1055 for this issue.

Upgrading to version 1.0.39 eliminates this vulnerability. Applying the patch 0f822af0445e5348ce7b7bd8ce1204244f31d174 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Name

• uClibc
• uClibc-ng

Version

• 1.0.0
• 1.0.1
• 1.0.2
• 1.0.3
• 1.0.4
• 1.0.5
• 1.0.6
• 1.0.7
• 1.0.8
• 1.0.9
• 1.0.10
• 1.0.11
• 1.0.12
• 1.0.13
• 1.0.14
• 1.0.15
• 1.0.16
• 1.0.17
• 1.0.18
• 1.0.19
• 1.0.20
• 1.0.21
• 1.0.22
• 1.0.23
• 1.0.24
• 1.0.25
• 1.0.26
• 1.0.27
• 1.0.28
• 1.0.29
• 1.0.30
• 1.0.31
• 1.0.32
• 1.0.33
• 1.0.34
• 1.0.35
• 1.0.36
• 1.0.37
• 1.0.38

License

• open-source

CPE 2.3info

• 🔍
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CPE 2.2info

• 🔍
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Entryinfo

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