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.
CVE-2024-32017
“—” beside the score: it is equal to NVD's CVSS score.
This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 1.6% (75th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.
Also known asEUVD-2024-29855 (ENISA EUVD)Source: ENISA EUVD
- CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.
CISA-ADP, in the CVE record, lists riot-os riot versions up to and including 2023.10 as affected. No release containing a fix is confirmed on record.
- CVSS v3
- 9.8
- EG Score
- 9.8CRITICALmedium confidence
- EG Risk
- 75EG Risk 75/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity98% × 45%Impact severity (EG Severity): CVSS 9.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation40% × 40%EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.Automatability100% × 15%CISA's SSVC Automatable value: yes (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: No fix is confirmed yet. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high. - EPSS PROB
- 1.6%
- EPSS %ILE
- 75th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (9.8): severity, escalated by confirmed exploitation. This CVE's 9.8 is its impact severity (EG Severity), not escalated.
- EG Severity
- 9.8 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
- EG Likelihood
- 1.6% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-01). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track* at medium mission impactTrack at low, Track* at medium and Attend at high mission impact.CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Track* at medium and Attend at high mission impact.
No fix is confirmed yet. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high.
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.
No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says.
The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
May 1, 2024
Last Modified
September 4, 2025
Advisory Details (5)
Auto-updated Oct 9, 2026Buffer overflows in RIOT /sys/net/application_layer/gcoap/ · Advisory · RIOT-OS/RIOT · GitHub
https://github.com/RIOT-OS/RIOT/security/advisories/GHSA-v97j-w9m6-c4h3RIOT/sys/net/application_layer/gcoap/forward_proxy.c at master · RIOT-OS/RIOT · GitHub
https://github.com/RIOT-OS/RIOT/blob/master/sys/net/application_layer/gcoap/forward_proxy.c#L352RIOT/sys/net/application_layer/gcoap/dns.c at master · RIOT-OS/RIOT · GitHub
https://github.com/RIOT-OS/RIOT/blob/master/sys/net/application_layer/gcoap/dns.c#L319-L325oss-security - HNS-2024-07 - HN Security Advisory - Multiple vulnerabilities in RIOT OS
http://www.openwall.com/lists/oss-security/2024/05/07/3Full Disclosure: HNS-2024-07 - HN Security Advisory - Multiple vulnerabilities in RIOT OS
http://seclists.org/fulldisclosure/2024/May/7Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 14× in last 7d / 53× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 95 of 235 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 5 repeat rows among the latest 100 are merged into the row they repeat. The 140 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-11-02 16:40 UTCEPSS rescoreEPSS 1.6% · 75th percentile
- 2026-11-02 13:09 UTCEG score recompute
- 2026-11-01 16:31 UTCEPSS rescoreEPSS 1.6% · 75th percentile
- 2026-10-31 17:34 UTCEG score recompute
- 2026-10-31 16:30 UTCEPSS rescoreEPSS 1.6% · 75th percentile
- 2026-10-30 19:49 UTCEG score recompute
- 2026-10-30 16:32 UTCEPSS rescoreEPSS 1.6% · 75th percentile
- 2026-10-29 22:01 UTCEG score recompute
- 2026-10-29 16:30 UTCEPSS rescoreEPSS 1.6% · 75th percentile
- 2026-10-29 00:15 UTCEG score recompute
- 2026-10-28 16:29 UTCEPSS rescoreEPSS 1.6% · 75th percentile
- 2026-10-28 02:30 UTCEG score recompute
- 2026-10-27 16:29 UTCEPSS rescoreEPSS 1.6% · 74th percentile
- 2026-10-27 04:39 UTCEG score recompute
- 2026-10-26 16:29 UTCEPSS rescoreEPSS 1.6% · 74th percentile
- 2026-10-25 17:12 UTCEG score recompute
- 2026-10-25 16:30 UTCEPSS rescoreEPSS 1.6% · 74th percentile
- 2026-10-25 04:37 UTCEG score recompute
- 2026-10-24 16:30 UTCEPSS rescoreEPSS 1.6% · 74th percentile
- 2026-10-24 06:52 UTCEG score recompute
- 2026-10-23 16:29 UTCEPSS rescoreEPSS 1.6% · 74th percentile
- 2026-10-23 09:05 UTCEG score recompute
- 2026-10-22 16:31 UTCEPSS rescoreEPSS 1.6% · 74th percentile
- 2026-10-22 11:15 UTCEG score recompute
- 2026-10-21 16:29 UTCEPSS rescoreEPSS 1.6% · 74th percentile
Show 70 moreShow fewer
- 2026-10-21 13:29 UTCEG score recompute
- 2026-10-20 16:30 UTCEPSS rescoreEPSS 1.6% · 74th percentile
- 2026-10-20 15:14 UTCEG score recompute
- 2026-10-19 16:29 UTCEPSS rescoreEPSS 1.6% · 74th percentile
- 2026-10-18 17:46 UTCEG score recompute
- 2026-10-18 16:29 UTCEPSS rescoreEPSS 1.6% · 74th percentile
- 2026-10-18 07:17 UTCEG score recompute
- 2026-10-17 20:00 UTCEG score recompute
- 2026-10-17 16:30 UTCEPSS rescoreEPSS 1.6% · 74th percentile
- 2026-10-16 22:10 UTCEG score recompute
- 2026-10-16 16:36 UTCEPSS rescoreEPSS 1.6% · 74th percentile
- 2026-10-15 18:45 UTCEG score recompute
- 2026-10-15 16:30 UTCEPSS rescoreEPSS 1.6% · 74th percentile
- 2026-10-14 16:30 UTCEPSS rescoreEPSS 1.6% · 74th percentile
- 2026-10-14 12:24 UTCEG score recompute
- 2026-10-13 16:30 UTCEPSS rescoreEPSS 1.6% · 74th percentile
- 2026-10-12 17:55 UTCEG score recompute
- 2026-10-12 16:31 UTCEPSS rescoreEPSS 1.6% · 74th percentile
- 2026-10-11 21:20 UTCEG score recompute
- 2026-10-11 16:13 UTCEG score recompute
- 2026-10-11 13:46 UTCEPSS rescoreEPSS 1.6% · 74th percentile
- 2026-10-11 11:16 UTCOSV refresh
- 2026-10-10 19:58 UTCEPSS rescoreEPSS 1.6% · 74th percentile
- 2026-10-09 20:05 UTCEPSS rescoreEPSS 1.6% · 74th percentile
- 2026-10-08 17:07 UTCEPSS rescoreEPSS 1.6% · 74th percentile
- 2026-10-07 23:46 UTCEPSS rescoreEPSS 1.6% · 74th percentile
- 2026-10-06 15:15 UTCEPSS rescoreEPSS 1.6% · 74th percentile
- 2026-10-05 17:41 UTCEPSS rescoreEPSS 1.6% · 74th percentile
- 2026-10-03 14:24 UTCEPSS rescoreEPSS 1.5% · 74th percentile
- 2026-10-01 19:48 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-09-30 19:43 UTCEG score recompute
- 2026-09-30 15:01 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-09-29 15:17 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-09-28 13:49 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-09-27 13:43 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-09-26 15:57 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-09-26 00:23 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-09-24 14:01 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-09-23 13:46 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-09-22 14:46 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-09-21 23:45 UTCOSV refresh
- 2026-09-20 20:14 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-09-19 15:40 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-09-18 19:26 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-09-16 14:06 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-09-15 03:08 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-09-13 16:45 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-09-12 14:59 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-09-11 14:51 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-09-11 09:35 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-09-08 21:58 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-09-07 15:59 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-09-06 13:46 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-09-05 15:26 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
- 2026-09-04 13:58 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-09-04 05:05 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-09-02 19:08 UTCOSV refresh
- 2026-09-02 14:10 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-09-01 13:52 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-08-30 19:15 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-08-30 01:20 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
- 2026-08-28 21:39 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
- 2026-08-27 14:23 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-08-26 14:44 UTCEPSS rescoreEPSS 1.5% · 73rd percentile
- 2026-08-25 13:47 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
- 2026-08-24 14:15 UTCEPSS rescoreEPSS 1.5% · 72nd percentile
- 2026-08-23 00:17 UTCEPSS rescoreEPSS 1.5% · 71st percentile
- 2026-08-21 23:47 UTCEPSS rescoreEPSS 1.5% · 71st percentile
- 2026-08-20 22:53 UTCEPSS rescoreEPSS 1.5% · 71st percentile
- 2026-08-19 17:02 UTCEPSS rescoreEPSS 1.5% · 71st percentile
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2024-32017?
When was the CVE record for CVE-2024-32017 published?
Is CVE-2024-32017 actively exploited?
What is the CVSS score of CVE-2024-32017?
How do I remediate CVE-2024-32017?
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2024-32017
Is Your Infrastructure Affected by CVE-2024-32017?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.