CVE-2022-34037

HIGH
Published Jul 22, 20223y ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published Jul 22, 2022 3y ago
Last Modified Jun 17, 2026 2w ago

Description

An out-of-bounds read in the rewrite function at /modules/caddyhttp/rewrite/rewrite.go in Caddy v2.5.1 allows attackers to cause a Denial of Service (DoS) via a crafted URI. Note: This has been disputed as a bug, not a security vulnerability, in the Caddy web server that emerged when an administrator's bad configuration containing a malformed request URI caused the server to return an empty reply instead of a valid HTTP response to the client.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-125 Out-of-bounds Read Memory Safety

Affected Products 1

VendorProductVersionRange
caddyservercaddy2.5.1any

References 2

  • github.com https://github.com/caddyserver/caddy/issues/4775
    ExploitIssue TrackingPatchThird Party Advisory
  • github.com https://github.com/caddyserver/caddy/issues/4775#issuecomment-1203388116

Remediation

  • github.com https://github.com/caddyserver/caddy/issues/4775
    ExploitIssue TrackingPatchThird Party Advisory