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githubGitHub Advisory DatabaseGHSA-XCJX-M2PJ-8G79
HistoryApr 22, 2022 - 8:54 p.m.

Manipulated inline images can cause Infinite Loop in PyPDF2

2022-04-2220:54:41
CWE-835
GitHub Advisory Database
github.com
17
pypdf2
pdf
infinite loop
security
contentstream
sebastian krause
vulnerability
patched
issue 329
pr 740

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

CVSS3

6.2

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

0.001

Percentile

39.9%

JSON

Impact

An attacker who uses this vulnerability can craft a PDF which leads to an infinite loop if the PyPDF2 user wrote the following code:

from PyPDF2 import PdfFileReader, PdfFileWriter
from PyPDF2.pdf import ContentStream

reader = PdfFileReader("malicious.pdf", strict=False)
for page in reader.pages:
    ContentStream(page.getContents(), reader)

Patches

PyPDF2==1.27.5 and later are patched.

Credits to Sebastian Krause for finding (issue) and fixing (PR) it.

Affected configurations

Vulners
Node
pypdf2_projectpypdf2Range<1.27.5
VendorProductVersionCPE
pypdf2_projectpypdf2*cpe:2.3:a:pypdf2_project:pypdf2:*:*:*:*:*:*:*:*

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CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

CVSS3

6.2

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

0.001

Percentile

39.9%

JSON
Related for GHSA-XCJX-M2PJ-8G79
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