CVE-2021-27427 RIOT OS Integer Overflow or Wraparound

What is CVE-2021-27427?

CVE-2021-27427 is a high-severity vulnerability in RIOT OS, published on 3 May 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

RIOT OS version 2020.01.1 is vulnerable to integer wrap-around in its implementation of calloc function, which can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash or a remote code injection/execution.

Weakness: CWE-190

Which versions are affected by CVE-2021-27427?

It affects 1 product.

Products include Riot-Os Riot.

How do I fix CVE-2021-27427?

No fix has been published for CVE-2021-27427 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-27427 being exploited?

There is no known exploitation of CVE-2021-27427 in the wild and no public exploit code.

Other vulnerabilities in RIOT OS

• CVE-2024-32017 Buffer overflows in RIOT Critical 9.8
• CVE-2023-33975 RIOT-OS vulnerable to Out of Bounds Write in _rbuf_add Critical 9.8
• CVE-2023-24819 RIOT-OS vulnerable to Buffer Overflow during IPHC receive Critical 9.8
• CVE-2023-24823 RIOT-OS vulnerable to Packet Type Confusion during IPHC send Critical 9.8
• CVE-2021-27357 Memory corruption in n/a Critical 9.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-xw8p-6vv6-4c5g.