CVE-2021-29421

2021-04-0617:47:48

redhat.com

access.redhat.com

pikepdf library

xmp metadata parsing

xxe injection

pdf files

data confidentiality

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

EPSS

0.001

Percentile

47.8%

JSON

There’s a flaw in the pikepdf Python library’s XMP metadata parsing functionality. An attacker who is able to submit a crafted PDF file to be processed by pikepdf could trigger an XML External Entity (XXE) injection. The highest threat of this flaw is to confidentiality of data.