Buffer overflow in Riot-Os Riot
CVE-2024-32017
RIOT is a real-time multi-threading operating system that supports a range of devices that are typically 8-bit, 16-bit and 32-bit microcontrollers. The size check in the `gcoap_dns_server_proxy_get()` function contains a small typo that may lead to a buffer overflow in the subsequent `strcpy()`. In detail, the length of the `_uri` string is checked instead of the length of the `_proxy` string. The `_gcoap_forward_proxy_copy_options()` function does not implement an explicit size check before copying data to the `cep->req_etag` buffer that is `COAP_ETAG_LENGTH_MAX` bytes long. If an attacker can craft input so that `optlen` becomes larger than `COAP_ETAG_LENGTH_MAX`, they can cause a buffer overflow. If the input above is attacker-controlled and crosses a security boundary, the impact of the buffer overflow vulnerabilities could range from denial of service to arbitrary code execution. This issue has yet to be patched. Users are advised to add manual bounds checking.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.015 (73.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 73.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000
Affected products
- Riot-Os Riot — versions <= 2023.10
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/RIOT-OS/RIOT/security/advisories/GHSA-v97j-w9m6-c4h3 (Exploit, Vendor Advisory)
- github.com/RIOT-OS/RIOT/blob/master/sys/net/application_layer/gcoap/dns.c (Product)
- github.com/RIOT-OS/RIOT/blob/master/sys/net/application_layer/gcoap/forward_pro… (Product)
- www.openwall.com/lists/oss-security/2024/05/07/3 (Mailing List, Third Party Advisory)
- seclists.org/fulldisclosure/2024/May/7 (Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2024-32017?
- CVE-2024-32017 is a critical-severity vulnerability in Riot-Os Riot, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2024-05-01.
- How severe is CVE-2024-32017?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2024-32017 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.