Rustix is a set of safe Rust bindings to POSIX-ish APIs. When using `rustix::fs::Dir` using the `linux_raw` backend, it's possible for the iterator to "get stuck" when an IO error is encountered. Combined with a memory over-allocation issue in `rustix::fs::Dir::read_more`, this can cause quick and unbounded memory explosion (gigabytes in a few seconds if used on a hot path) and eventually lead to an OOM crash of the application. The symptoms were initially discovered in https://github.com/imsnif/bandwhich/issues/284. That post has lots of details of our investigation. Full details can be read on the GHSA-c827-hfw6-qwvm repo advisory. If a program tries to access a directory with its file descriptor after the file has been unlinked (or any other action that leaves the `Dir` iterator in the stuck state), and the implementation does not break after seeing an error, it can cause a memory explosion. As an example, Linux's various virtual file systems (e.g. `/proc`, `/sys`) can contain directories that spontaneously pop in and out of existence. Attempting to iterate over them using `rustix::fs::Dir` directly or indirectly (e.g. with the `procfs` crate) can trigger this fault condition if the implementation decides to continue on errors. An attacker knowledgeable about the implementation details of a vulnerable target can therefore try to trigger this fault condition via any one or a combination of several available APIs. If successful, the application host will quickly run out of memory, after which the application will likely be terminated by an OOM killer, leading to denial of service. This issue has been addressed in release versions 0.35.15, 0.36.16, 0.37.25, and 0.38.19. Users are advised to upgrade. There are no known workarounds for this issue.

The version of kata-containers / kata-containers-cc / rust installed on the remote Azure Linux 3.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2024-43806 advisory.

  - Rustix is a set of safe Rust bindings to POSIX-ish APIs. When using `rustix::fs::Dir` using the     `linux_raw` backend, it's possible for the iterator to get stuck when an IO error is encountered.
    Combined with a memory over-allocation issue in `rustix::fs::Dir::read_more`, this can cause quick and     unbounded memory explosion (gigabytes in a few seconds if used on a hot path) and eventually lead to an     OOM crash of the application. The symptoms were initially discovered in     https://github.com/imsnif/bandwhich/issues/284. That post has lots of details of our investigation. Full     details can be read on the GHSA-c827-hfw6-qwvm repo advisory. If a program tries to access a directory     with its file descriptor after the file has been unlinked (or any other action that leaves the `Dir`     iterator in the stuck state), and the implementation does not break after seeing an error, it can cause a     memory explosion. As an example, Linux's various virtual file systems (e.g. `/proc`, `/sys`) can contain     directories that spontaneously pop in and out of existence. Attempting to iterate over them using     `rustix::fs::Dir` directly or indirectly (e.g. with the `procfs` crate) can trigger this fault condition     if the implementation decides to continue on errors. An attacker knowledgeable about the implementation     details of a vulnerable target can therefore try to trigger this fault condition via any one or a     combination of several available APIs. If successful, the application host will quickly run out of memory,     after which the application will likely be terminated by an OOM killer, leading to denial of service. This     issue has been addressed in release versions 0.35.15, 0.36.16, 0.37.25, and 0.38.19. Users are advised to     upgrade. There are no known workarounds for this issue. (CVE-2024-43806)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The version of kata-containers / kata-containers-cc / rust installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2024-43806 advisory.

  - Rustix is a set of safe Rust bindings to POSIX-ish APIs. When using `rustix::fs::Dir` using the     `linux_raw` backend, it's possible for the iterator to get stuck when an IO error is encountered.
    Combined with a memory over-allocation issue in `rustix::fs::Dir::read_more`, this can cause quick and     unbounded memory explosion (gigabytes in a few seconds if used on a hot path) and eventually lead to an     OOM crash of the application. The symptoms were initially discovered in     https://github.com/imsnif/bandwhich/issues/284. That post has lots of details of our investigation. Full     details can be read on the GHSA-c827-hfw6-qwvm repo advisory. If a program tries to access a directory     with its file descriptor after the file has been unlinked (or any other action that leaves the `Dir`     iterator in the stuck state), and the implementation does not break after seeing an error, it can cause a     memory explosion. As an example, Linux's various virtual file systems (e.g. `/proc`, `/sys`) can contain     directories that spontaneously pop in and out of existence. Attempting to iterate over them using     `rustix::fs::Dir` directly or indirectly (e.g. with the `procfs` crate) can trigger this fault condition     if the implementation decides to continue on errors. An attacker knowledgeable about the implementation     details of a vulnerable target can therefore try to trigger this fault condition via any one or a     combination of several available APIs. If successful, the application host will quickly run out of memory,     after which the application will likely be terminated by an OOM killer, leading to denial of service. This     issue has been addressed in release versions 0.35.15, 0.36.16, 0.37.25, and 0.38.19. Users are advised to     upgrade. There are no known workarounds for this issue. (CVE-2024-43806)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2024:3404-1 advisory.

    - Update to version 0.10.0
    - CVE-2024-43806: Fixed rustix::fs::Dir iterator with the linux_raw backend that can cause memory     exhaustion. (bsc#1229959)

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
216051	Azure Linux 3.0 Security Update: kata-containers / kata-containers-cc / rust (CVE-2024-43806)	Nessus	Azure Linux Local Security Checks	medium
213306	CBL Mariner 2.0 Security Update: kata-containers / kata-containers-cc / rust (CVE-2024-43806)	Nessus	MarinerOS Local Security Checks	medium
207680	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : rage-encryption (SUSE-SU-2024:3404-1)	Nessus	SuSE Local Security Checks	medium

Detections

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CVE-2024-43806

medium

Tenable Plugins

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medium

medium