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cvelistGitHub_MCVELIST:CVE-2023-23924
HistoryJan 31, 2023 - 11:54 p.m.

CVE-2023-23924 URI validation failure on SVG parsing in Dompdf

2023-01-3123:54:30
CWE-551
GitHub_M
www.cve.org
1
dompdf
svg parsing
uri validation
php < 8
phar url wrapper
arbitrary object unserialize
arbitrary file deletion
remote code execution

CVSS3

10

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

LOW

Availability Impact

HIGH

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

AI Score

9.7

Confidence

High

EPSS

0.01

Percentile

84.0%

Dompdf is an HTML to PDF converter. The URI validation on dompdf 2.0.1 can be bypassed on SVG parsing by passing &lt;image&gt; tags with uppercase letters. This may lead to arbitrary object unserialize on PHP < 8, through the phar URL wrapper. An attacker can exploit the vulnerability to call arbitrary URL with arbitrary protocols, if they can provide a SVG file to dompdf. In PHP versions before 8.0.0, it leads to arbitrary unserialize, that will lead to the very least to an arbitrary file deletion and even remote code execution, depending on classes that are available.

CNA Affected

[
  {
    "vendor": "dompdf",
    "product": "dompdf",
    "versions": [
      {
        "version": "< 2.0.2",
        "status": "affected"
      }
    ]
  }
]

CVSS3

10

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

LOW

Availability Impact

HIGH

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

AI Score

9.7

Confidence

High

EPSS

0.01

Percentile

84.0%