CVE-2022-49762

ntfs: check overflow when iterating ATTR_RECORDs

Description

In the Linux kernel, the following vulnerability has been resolved: ntfs: check overflow when iterating ATTR_RECORDs Kernel iterates over ATTR_RECORDs in mft record in ntfs_attr_find(). Because the ATTR_RECORDs are next to each other, kernel can get the next ATTR_RECORD from end address of current ATTR_RECORD, through current ATTR_RECORD length field. The problem is that during iteration, when kernel calculates the end address of current ATTR_RECORD, kernel may trigger an integer overflow bug in executing `a = (ATTR_RECORD*)((u8*)a + le32_to_cpu(a->length))`. This may wrap, leading to a forever iteration on 32bit systems. This patch solves it by adding some checks on calculating end address of current ATTR_RECORD during iteration.

N/A

CVSS

Severity:

EPSS 0.10%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/5559eb5809353a83a40a1e4e7f066431c7b83020
https://git.kernel.org/stable/c/86f36de14dce5802856bb7a5921d74439db00b64
https://git.kernel.org/stable/c/45683723f6b53e39e8a4cec0894e61fd6ec71989
https://git.kernel.org/stable/c/b612f924f296408d7d02fb4cd01218afd4ed7184
https://git.kernel.org/stable/c/957732a09c3828267c2819d31c425aa793dd475b
https://git.kernel.org/stable/c/b63ddb3ba61e2d3539f87e095c881e552bc45dab
https://git.kernel.org/stable/c/785b2af9654b8beac55644e36da0085c5d776361
https://git.kernel.org/stable/c/63095f4f3af59322bea984a6ae44337439348fe0

Frequently Asked Questions

What is the severity of CVE-2022-49762?: CVE-2022-49762 has not yet been assigned a CVSS score.
How to fix CVE-2022-49762?: To fix CVE-2022-49762, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-49762 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2022-49762 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-49762?: CVE-2022-49762 affects Linux Linux, Linux Linux.

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