CVE-2023-38546

2023-10-1804:15:11

[email protected]

web.nvd.nist.gov

525

libcurl

cve-2023-38546

security vulnerability

attack vector

CVSS3

3.7

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

NONE

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

AI Score

Confidence

Low

EPSS

0.001

Percentile

35.6%

JSON

This flaw allows an attacker to insert cookies at will into a running program
using libcurl, if the specific series of conditions are met.

libcurl performs transfers. In its API, an application creates “easy handles”
that are the individual handles for single transfers.

libcurl provides a function call that duplicates en easy handle called
curl_easy_duphandle.

If a transfer has cookies enabled when the handle is duplicated, the
cookie-enable state is also cloned - but without cloning the actual
cookies. If the source handle did not read any cookies from a specific file on
disk, the cloned version of the handle would instead store the file name as
none (using the four ASCII letters, no quotes).

Subsequent use of the cloned handle that does not explicitly set a source to
load cookies from would then inadvertently load cookies from a file named
none - if such a file exists and is readable in the current directory of the
program using libcurl. And if using the correct file format of course.

Affected configurations

NVD

Node

haxxlibcurlRange7.9.1–8.4.0

CNA Affected

[
  {
    "vendor": "curl",
    "product": "curl",
    "versions": [
      {
        "version": "8.4.0",
        "status": "affected",
        "lessThan": "8.4.0",
        "versionType": "semver"
      },
      {
        "version": "7.9.1",
        "status": "unaffected",
        "lessThan": "7.9.1",
        "versionType": "semver"
      }
    ]
  }
]