ghsa-6f72-79f8-3qcp
Vulnerability from github
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] (__chk_dots_dentries:1421) --> Bad inode number[0x4] for '..', parent parent ino is [0x3] [FSCK] other corrupted bugs [Fail]
{ "affected": [], "aliases": [ "CVE-2023-52444" ], "database_specific": { "cwe_ids": [ "CWE-119" ], "github_reviewed": false, "github_reviewed_at": null, "nvd_published_at": "2024-02-22T17:15:08Z", "severity": "HIGH" }, "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to avoid dirent corruption\n\nAs Al reported in link[1]:\n\nf2fs_rename()\n...\n\tif (old_dir != new_dir \u0026\u0026 !whiteout)\n\t\tf2fs_set_link(old_inode, old_dir_entry,\n\t\t\t\t\told_dir_page, new_dir);\n\telse\n\t\tf2fs_put_page(old_dir_page, 0);\n\nYou want correct inumber in the \"..\" link. And cross-directory\nrename does move the source to new parent, even if you\u0027d been asked\nto leave a whiteout in the old place.\n\n[1] https://lore.kernel.org/all/20231017055040.GN800259@ZenIV/\n\nWith below testcase, it may cause dirent corruption, due to it missed\nto call f2fs_set_link() to update \"..\" link to new directory.\n- mkdir -p dir/foo\n- renameat2 -w dir/foo bar\n\n[ASSERT] (__chk_dots_dentries:1421) --\u003e Bad inode number[0x4] for \u0027..\u0027, parent parent ino is [0x3]\n[FSCK] other corrupted bugs [Fail]", "id": "GHSA-6f72-79f8-3qcp", "modified": "2024-06-27T12:30:43Z", "published": "2024-02-22T18:30:29Z", "references": [ { "type": "ADVISORY", "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52444" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/02160112e6d45c2610b049df6eb693d7a2e57b46" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/2fb4867f4405aea8c0519d7d188207f232a57862" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/53edb549565f55ccd0bdf43be3d66ce4c2d48b28" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/5624a3c1b1ebc8991318e1cce2aa719542991024" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/6f866885e147d33efc497f1095f35b2ee5ec7310" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/d3c0b49aaa12a61d560528f5d605029ab57f0728" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/f0145860c20be6bae6785c7a2249577674702ac7" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/f100ba617d8be6c98a68f3744ef7617082975b77" }, { "type": "WEB", "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html" }, { "type": "WEB", "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html" } ], "schema_version": "1.4.0", "severity": [ { "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "type": "CVSS_V3" } ] }
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