CVE-2024-25617 Denial of Service in HTTP Header parser in squid proxy

2024-02-1420:55:52

CWE-182

CWE-400

GitHub_M

github.com

squid

denial of service

http header parser

vulnerability

remote client

remote server

upgrade

squid-2024:2

CVSS3

5.3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

LOW

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

AI Score

6.7

Confidence

Low

SSVC

Exploitation

none

Automatable

yes

Technical Impact

partial

JSON

Squid is an open source caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a Collapse of Data into Unsafe Value bug ,Squid may be vulnerable to a Denial of Service attack against HTTP header parsing. This problem allows a remote client or a remote server to perform Denial of Service when sending oversized headers in HTTP messages. In versions of Squid prior to 6.5 this can be achieved if the request_header_max_size or reply_header_max_size settings are unchanged from the default. In Squid version 6.5 and later, the default setting of these parameters is safe. Squid will emit a critical warning in cache.log if the administrator is setting these parameters to unsafe values. Squid will not at this time prevent these settings from being changed to unsafe values. Users are advised to upgrade to version 6.5. There are no known workarounds for this vulnerability. This issue is also tracked as SQUID-2024:2

CNA Affected

[
  {
    "vendor": "squid-cache",
    "product": "squid",
    "versions": [
      {
        "status": "affected",
        "version": "< 6.5"
      }
    ]
  }
]

ADP Affected

[
  {
    "cpes": [
      "cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*"
    ],
    "vendor": "squid-cache",
    "product": "squid",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThan": "6.5",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unknown"
  }
]