NuttX up to 7.26 netlib_parsehttpurl.c netlib_parsehttpurl resource consumption

Summaryinfo

A vulnerability was found in NuttX up to 7.26. It has been rated as problematic. The affected element is the function netlib_parsehttpurl of the file apps/netutils/netlib/netlib_parsehttpurl.c. Performing a manipulation results in resource consumption. This vulnerability is identified as CVE-2018-20578. 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 problematic, was found in NuttX up to 7.26. This affects the function netlib_parsehttpurl of the file apps/netutils/netlib/netlib_parsehttpurl.c. The manipulation with an unknown input leads to a resource consumption vulnerability. CWE is classifying the issue as CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. This is going to have an impact on availability. The summary by CVE is:

An issue was discovered in NuttX before 7.27. The function netlib_parsehttpurl() in apps/netutils/netlib/netlib_parsehttpurl.c mishandles URLs longer than hostlen bytes (in the webclient, this is set by default to 40), leading to an Infinite Loop. The attack vector is the Location header of an HTTP 3xx response.

The bug was discovered 09/17/2018. The weakness was released 12/28/2018 (Website). The advisory is shared at bitbucket.org. This vulnerability is uniquely identified as CVE-2018-20578 since 12/28/2018. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

The vulnerability was handled as a non-public zero-day exploit for at least 102 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 7.27 eliminates this vulnerability.

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Productinfo

Name

• NuttX

Version

• 7.0
• 7.1
• 7.2
• 7.3
• 7.4
• 7.5
• 7.6
• 7.7
• 7.8
• 7.9
• 7.10
• 7.11
• 7.12
• 7.13
• 7.14
• 7.15
• 7.16
• 7.17
• 7.18
• 7.19
• 7.20
• 7.21
• 7.22
• 7.23
• 7.24
• 7.25
• 7.26

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

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Timelineinfo

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Entryinfo

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