In the Linux kernel, the following vulnerability has been resolved:
Squashfs: check the inode number is not the invalid value of zero
Syskiller has produced an out of bounds access in fill_meta_index().
That out of bounds access is ultimately caused because the inode
has an inode number with the invalid value of zero, which was not checked.
The reason this causes the out of bounds access is due to following
sequence of events:
1. Fill_meta_index() is called to allocate (via empty_meta_index())
and fill a metadata index. It however suffers a data read error
and aborts, invalidating the newly returned empty metadata index.
It does this by setting the inode number of the index to zero,
which means unused (zero is not a valid inode number).
2. When fill_meta_index() is subsequently called again on another
read operation, locate_meta_index() returns the previous index
because it matches the inode number of 0. Because this index
has been returned it is expected to have been filled, and because
it hasn't been, an out of bounds access is performed.
This patch adds a sanity check which checks that the inode number
is not zero when the inode is created and returns -EINVAL if it is.
[phillip@squashfs.org.uk: whitespace fix]
Link: https://lkml.kernel.org/r/20240409204723.446925-1-phillip@squashfs.org.uk
Metrics
Affected Vendors & Products
References
History
Sat, 23 Nov 2024 02:45:00 +0000
Type | Values Removed | Values Added |
---|---|---|
Weaknesses | CWE-125 |
Wed, 11 Sep 2024 13:30:00 +0000
Type | Values Removed | Values Added |
---|---|---|
Metrics |
ssvc
|
Fri, 06 Sep 2024 14:00:00 +0000
Type | Values Removed | Values Added |
---|---|---|
First Time appeared |
Redhat rhel Aus
Redhat rhel E4s Redhat rhel Tus |
|
CPEs | cpe:/o:redhat:rhel_aus:8.6 cpe:/o:redhat:rhel_e4s:8.6 cpe:/o:redhat:rhel_tus:8.6 |
|
Vendors & Products |
Redhat rhel Aus
Redhat rhel E4s Redhat rhel Tus |
Tue, 13 Aug 2024 23:00:00 +0000
Type | Values Removed | Values Added |
---|---|---|
CPEs | cpe:/o:redhat:rhel_eus:8.8 |
MITRE
Status: PUBLISHED
Assigner: Linux
Published: 2024-05-01T05:27:11.032Z
Updated: 2024-11-05T09:19:21.524Z
Reserved: 2024-02-19T14:20:24.204Z
Link: CVE-2024-26982
Vulnrichment
Updated: 2024-08-02T00:21:05.866Z
NVD
Status : Awaiting Analysis
Published: 2024-05-01T06:15:15.610
Modified: 2024-11-21T09:03:32.917
Link: CVE-2024-26982
Redhat