CVE-2019-11049 mail() may release string with refcount==1 twice

2019-12-1700:00:00

CWE-415

php

www.cve.org

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

HIGH

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

9.4 High

AI Score

Confidence

High

0.003 Low

EPSS

Percentile

71.7%

JSON

In PHP versions 7.3.x below 7.3.13 and 7.4.0 on Windows, when supplying custom headers to mail() function, due to mistake introduced in commit 78f4b4a2dcf92ddbccea1bb95f8390a18ac3342e, if the header is supplied in lowercase, this can result in double-freeing certain memory locations.

CNA Affected

[
  {
    "platforms": [
      "Windows"
    ],
    "product": "PHP",
    "vendor": "PHP Group",
    "versions": [
      {
        "lessThan": "7.3.13",
        "status": "affected",
        "version": "7.3.x",
        "versionType": "custom"
      },
      {
        "lessThan": "7.4.1",
        "status": "affected",
        "version": "7.4.x",
        "versionType": "custom"
      }
    ]
  }
]