5.9

CVE-2023-3766: cloudflare odoh-rs Classic Buffer Overflow

CVSS: 5.9v3.1MediumModified
AliasesGHSA-gpcv-p28p-fv2pRUSTSEC-2023-0095
Published 03-08-2023Last modified 09-10-2024
Open JSON

Vulnerability summary

CVE-2023-3766 is a medium (CVSS 5.9) Classic Buffer Overflow vulnerability in cloudflare odoh-rs. EPSS estimates a 0.78% chance of exploitation in the next 30 days, higher than 55% of scored vulnerabilities.

Overall risk
24/100
0100
Low · default modelHow is this calculated?
CVSS score
5.9/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.78%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 03-08-2023
    PublishedVulnerability first disclosed.
  2. 09-10-2024
    Last modifiedVulnerability information updated.

Description

A vulnerability was discovered in the odoh-rs rust crate that stems from faulty logic during the parsing of encrypted queries. This issue specifically occurs when processing encrypted query data received from remote clients and enables an attacker with knowledge of this vulnerability to craft and send specially designed encrypted queries to targeted ODOH servers running with odoh-rs. Upon successful exploitation, the server will crash abruptly, disrupting its normal operation and rendering the service temporarily unavailable.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.78%

Chance of exploitation in the next 30 days

Percentile

55%

Versus all other CVEs

30-day change

0.00 pp

From 0.78% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.78%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Cloudflare1 product
Crates.Io1 product
  • odoh-rs< 1.0.2 | ≥ 0.0.0-0, < 1.0.2

2 vendors · 2 products

References

7 links