Skip to content

Imageflow versions < 2.0.0-preview6 affected by libwebp zero-day (CVE-2023-4863), and should not be used with malicious source images.

High
lilith published GHSA-7vpr-3ppw-qrpj Sep 27, 2023

Package

nuget ImageResizer.Plugins.Imageflow (NuGet)

Affected versions

< 5.0.12

Patched versions

5.0.13-preview09
nuget Imageflow.AllPlatforms (NuGet)
< 0.10.2
0.10.2
nuget Imageflow.NativeRuntime.osx-x86_64 (NuGet)
< 2.0.0-preview6
2.0.0-preview8
nuget Imageflow.NativeRuntime.osx_10_11-x86_64 (NuGet)
< 2.0.0-preview6
None
nuget Imageflow.NativeRuntime.ubuntu-x86_64 (NuGet)
< 2.0.0-preview6
2.0.0-preview8
nuget Imageflow.NativeRuntime.ubuntu-x86_64-haswell (NuGet)
< 2.0.0-preview6
2.0.0-preview8
nuget Imageflow.NativeRuntime.ubuntu_16_04-x86_64 (NuGet)
< 2.0.0-preview6
None
nuget Imageflow.NativeRuntime.ubuntu_18_04-x86_64 (NuGet)
< 2.0.0-preview6
None
nuget Imageflow.NativeRuntime.ubuntu_18_04-x86_64-haswell (NuGet)
< 2.0.0-preview6
None
nuget Imageflow.NativeRuntime.win-x86 (NuGet)
< 2.0.0-preview6
2.0.0-preview8
nuget Imageflow.NativeRuntime.win-x86_64 (NuGet)
< 2.0.0-preview6
2.0.0-preview8
nuget Imageflow.NativeTool.osx-x86_64 (NuGet)
< 2.0.0-preview6
2.0.0-preview8
nuget Imageflow.NativeTool.osx_10_11-x86_64 (NuGet)
< 2.0.0-preview6
None
nuget Imageflow.NativeTool.ubuntu-x86_64 (NuGet)
< 2.0.0-preview6
2.0.0-preview8
nuget Imageflow.NativeTool.ubuntu-x86_64-haswell (NuGet)
< 2.0.0-preview6
2.0.0-preview8
nuget Imageflow.NativeTool.ubuntu_16_04-x86_64 (NuGet)
< 2.0.0-preview6
None
nuget Imageflow.NativeTool.ubuntu_18_04-x86_64 (NuGet)
< 2.0.0-preview6
None
nuget Imageflow.NativeTool.ubuntu_18_04-x86_64-haswell (NuGet)
< 2.0.0-preview6
None
nuget Imageflow.NativeTool.win-x86 (NuGet)
< 2.0.0-preview6
2.0.0-preview8
nuget Imageflow.NativeTool.win-x86_64 (NuGet)
< 2.0.0-preview6
2.0.0-preview8
nuget Imageflow.Server (NuGet)
< 0.8.2
0.8.2
cargo imageflow (Rust)
<2.0.0-preview6
2.0.0-preview8

Description

Impact

This vulnerability affects deployments of Imageflow that involve decoding or processing malicious source .webp files. If you only process your own trusted files, this should not affect you (but you should update anyway).

Imageflow relies on Google's [libwebp] library to decode .webp images, and is affected by the recent zero-day out-of-bounds write vulnerability CVE-2023-4863 and GHSA-j7hp-h8jx-5ppr. The libwebp vulnerability also affects Chrome, Android, macOS, and other consumers of the library).

libwebp patched the vulnerability and released 1.3.2

This was patched in libwebp-sys in 0.9.3 and 0.9.4

Imageflow v2.0.0-preview8 uses the patched version of libwebp as well as updated versions of all dependencies.

Note: preview 8 requires libc 2.31 or higher on linux and macOS 11 or higher. These restrictions are due to the oldest supported versions of those platforms (which is reflected on Github Actions).

Patches

Imageflow v2.0.0-preview8 use the patched version (v1.3.2) of libwebp and libwebp-sys 0.9.4.
Imageflow.AllPlatforms 0.10.2 is patched
Imageflow.Server v0.8.2 is patched
ImageResizer.Plugins.Imageflow 5.0.12 is patched

Workarounds

Disable webp decoding using EnabledCodecs::disable_decoder(NamedDecoders::WebPDecoder) if using the Rust API.

Only files that meet the following criteria will be passed to libwebp:

bytes.starts_with(b"RIFF") && bytes[8..12].starts_with(b"WEBP")

You can utilize matching logic to block webp inputs in your language of choice.

References

GHSA-j7hp-h8jx-5ppr
https://nvd.nist.gov/vuln/detail/CVE-2023-4863
webmproject/libwebp@2af2626
https://github.com/NoXF/libwebp-sys/commits/master

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVE ID

CVE-2023-4863

Weaknesses

No CWEs