CVE-2024-53142— Linux kernel 安全漏洞
一分钟漏洞结论
影响对象
Linux Linux
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于未正确处理非零终止的文件名，可能导致缓冲区溢出。
可能的 ATT&CK 技术 1 AI
T1204.002 · Malicious File影响版本矩阵 20
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< bb7ac96670ab1d8d681015f9d66e45dad579af4d |
affected |
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< c509b1acbd867d9e09580fe059a924cb5825afb1 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< d3df9f26cff97beaa5643e551031795d5d5cddbe |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 6983b8ac787b3add5571cda563574932a59a99bb |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< f892ddcf9f645380c358e73653cb0900f6bc9eb8 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 1a423bbbeaf9e3e20c4686501efd9b661fe834db |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 49d01e736c3045319e030d1e75fb983011abaca7 |
affected | ||
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< fb83b093f75806333b6f4ae29b158d2e0e3ec971 |
affected | ||
| … +12 条更多 | |||
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一、 漏洞 CVE-2024-53142 基础信息
漏洞信息
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Vulnerability Title
initramfs: avoid filename buffer overrun
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
initramfs: avoid filename buffer overrun
The initramfs filename field is defined in
Documentation/driver-api/early-userspace/buffer-format.rst as:
37 cpio_file := ALGN(4) + cpio_header + filename + "\0" + ALGN(4) + data
...
55 ============= ================== =========================
56 Field name Field size Meaning
57 ============= ================== =========================
...
70 c_namesize 8 bytes Length of filename, including final \0
When extracting an initramfs cpio archive, the kernel's do_name() path
handler assumes a zero-terminated path at @collected, passing it
directly to filp_open() / init_mkdir() / init_mknod().
If a specially crafted cpio entry carries a non-zero-terminated filename
and is followed by uninitialized memory, then a file may be created with
trailing characters that represent the uninitialized memory. The ability
to create an initramfs entry would imply already having full control of
the system, so the buffer overrun shouldn't be considered a security
vulnerability.
Append the output of the following bash script to an existing initramfs
and observe any created /initramfs_test_fname_overrunAA* path. E.g.
./reproducer.sh | gzip >> /myinitramfs
It's easiest to observe non-zero uninitialized memory when the output is
gzipped, as it'll overflow the heap allocated @out_buf in __gunzip(),
rather than the initrd_start+initrd_size block.
---- reproducer.sh ----
nilchar="A" # change to "\0" to properly zero terminate / pad
magic="070701"
ino=1
mode=$(( 0100777 ))
uid=0
gid=0
nlink=1
mtime=1
filesize=0
devmajor=0
devminor=1
rdevmajor=0
rdevminor=0
csum=0
fname="initramfs_test_fname_overrun"
namelen=$(( ${#fname} + 1 )) # plus one to account for terminator
printf "%s%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%s" \
$magic $ino $mode $uid $gid $nlink $mtime $filesize \
$devmajor $devminor $rdevmajor $rdevminor $namelen $csum $fname
termpadlen=$(( 1 + ((4 - ((110 + $namelen) & 3)) % 4) ))
printf "%.s${nilchar}" $(seq 1 $termpadlen)
---- reproducer.sh ----
Symlink filename fields handled in do_symlink() won't overrun past the
data segment, due to the explicit zero-termination of the symlink
target.
Fix filename buffer overrun by aborting the initramfs FSM if any cpio
entry doesn't carry a zero-terminator at the expected (name_len - 1)
offset.
来源: CVE Program / CVE List V5
CVSS Information
N/A
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于未正确处理非零终止的文件名，可能导致缓冲区溢出。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2024-53142 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2024-53142 补丁与修复 (9)
IV. Related Vulnerabilities
V. Comments for CVE-2024-53142
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