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GHSA-7vpr-3ppw-qrpj
No affected components available
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 https://github.com/advisories/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
https://github.com/advisories/GHSA-j7hp-h8jx-5ppr https://nvd.nist.gov/vuln/detail/CVE-2023-4863 https://github.com/webmproject/libwebp/commit/2af26267cdfcb63a88e5c74a85927a12d6ca1d76 https://github.com/NoXF/libwebp-sys/commits/master
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. The attacker needs the user to perform some action, like clicking a link. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information. There is a high impact on the integrity of the data. There is a high impact on the availability of the system.
Exploitation activity has been observed. Apply available patches or mitigations urgently.
Probability that this vulnerability will be exploited in the wild within the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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