Vulnerability in Deno
CVE-2023-26103
Versions of the package deno before 1.31.0 are vulnerable to Regular Expression Denial of Service (ReDoS) due to the upgradeWebSocket function, which contains regexes in the form of /s*,s*/, used for splitting the Connection/Upgrade header. A specially crafted Connection/Upgrade header can be used to significantly slow down a web socket server.
Vulnerability class: ReDoS (Regular Expression Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.012 (67.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 67.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000
Affected products
- Deno
- Deno — versions 0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security.snyk.io/vuln/SNYK-RUST-DENO-3315970 (Technical Description, Exploit, Third Party Advisory)
- github.com/denoland/deno/blob/2b247be517d789a37e532849e2e40b724af0918f/ext/http… (Broken Link)
- github.com/denoland/deno/pull/17722 (Patch)
- github.com/denoland/deno/commit/cf06a7c7e672880e1b38598fe445e2c50b4a9d06 (Patch)
- github.com/denoland/deno/releases/tag/v1.31.0 (Release Notes)
Frequently asked questions
- What is CVE-2023-26103?
- CVE-2023-26103 is a medium-severity vulnerability in Deno, classified under Inefficient Regular Expression Complexity. CVSS score: 5.3/10. Published 2023-02-25.
- How severe is CVE-2023-26103?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2023-26103 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.