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CVE-2023-52444
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CVE-2023-52444
MITRE ATT&CK
Collection
Command and Control
Credential Access
Defense Evasion
Discovery
Execution
Exfiltration
Impact
Initial Access
Lateral Movement
Persistence
Privilege Escalation
Topic Tags
Description
In the Linux kernel, the following vulnerability has been resolved:
f2fs: fix to avoid dirent corruption
As Al reported in link[1]:
f2fs_rename()
…
if (old_dir != new_dir && !whiteout) f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); else f2fs_put_page(old_dir_page, 0);
You want correct inumber in the “..” link. And cross-directory
rename does move the source to new parent, even if you’d been asked
to leave a whiteout in the old place.
[1] https://lore.kernel.org/all/20231017055040.GN800259@ZenIV/
With below testcase, it may cause dirent corruption, due to it missed
to call f2fs_set_link() to update “..” link to new directory.
- mkdir -p dir/foo
- renameat2 -w dir/foo bar
ASSERT —> Bad inode number[0x4] for ‘..’, parent parent ino is [0x3]
[FSCK] other corrupted bugs [Fail]
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General Information
Vendors
- linux
Products
- linux kernel
References
Miscellaneous
Additional Info
Technical Analysis
Report as Exploited in the Wild
CVE ID
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