CVE-2023-24821

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    CVE-2023-24821

    Published: 24 Apr 2023Last Modified: 12 Aug 2026

    Summary: RIOT-OS vulnerable to Integer Underflow during defragmentation

    Details: RIOT-OS, an operating system that supports Internet of Things devices, contains a network stack with the ability to process 6LoWPAN frames. Prior to version 2022.10, an attacker can send a crafted frame to the device resulting in a large out of bounds write beyond the packet buffer. The write will create a hard fault exception after reaching the last page of RAM. The hard fault is not handled and the system will be stuck until reset, thus the impact is denial of service. Version 2022.10 fixes this issue. As a workaround, disable support for fragmented IP datagrams or apply the patches manually.

    References: https://github.com/RIOT-OS/RIOT/pull/18817/commits/9728f727e75d7d78dbfb5918e0de1b938b7b6d2c, https://github.com/RIOT-OS/RIOT/pull/18820/commits/bd31010231f5340e21410595dd95afc86bbfd341, https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/24xxx/CVE-2023-24821.json, https://github.com/RIOT-OS/RIOT/security/advisories/GHSA-2fpr-82xr-p887, https://nvd.nist.gov/vuln/detail/CVE-2023-24821

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -365fbed906226dc36f50b0929e07426acbcc1e7d

    Affected versions

    2022.07-devel

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2023-24821 | CVE-DB