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CVE-2024-43845— udf: Fix bogus checksum computation in udf_rename()

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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 udf 模块在udf_rename中，由于未初始化的内存访问，错误的checksum计算可能导致访问无效的内存。

CVSS 7.8 · High EPSS 0.22% · P12

Affected Version Matrix 9

VendorProduct Version RangeStatus
Linux Linux 626860c470ff88e5f7f22a282efd1bfe953a1b54< 9c439311c13fc6faab1921441165c9b8b500c83b affected
e9109a92d2a95889498bed3719cd2318892171a2< fe2ead240c31e8d158713beca9d0681a6e6a53ab affected
e9109a92d2a95889498bed3719cd2318892171a2< 40d7b3ed52449d36143bab8d3e70926aa61a60f4 affected
e9109a92d2a95889498bed3719cd2318892171a2< 27ab33854873e6fb958cb074681a0107cc2ecc4c affected
6.3 affected
< 6.3 unaffected
6.6.44≤ 6.6.* unaffected
6.10.3≤ 6.10.* unaffected
… +1 more rows
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I. Basic Information for CVE-2024-43845

Vulnerability Information
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Vulnerability Title
udf: Fix bogus checksum computation in udf_rename()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: udf: Fix bogus checksum computation in udf_rename() Syzbot reports uninitialized memory access in udf_rename() when updating checksum of '..' directory entry of a moved directory. This is indeed true as we pass on-stack diriter.fi to the udf_update_tag() and because that has only struct fileIdentDesc included in it and not the impUse or name fields, the checksumming function is going to checksum random stack contents beyond the end of the structure. This is actually harmless because the following udf_fiiter_write_fi() will recompute the checksum from on-disk buffers where everything is properly included. So all that is needed is just removing the bogus calculation.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
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 udf 模块在udf_rename中，由于未初始化的内存访问，错误的checksum计算可能导致访问无效的内存。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 626860c470ff88e5f7f22a282efd1bfe953a1b54 ~ 9c439311c13fc6faab1921441165c9b8b500c83b -
Linux Linux 6.3 -

II. Public POCs for CVE-2024-43845

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III. Intelligence Information for CVE-2024-43845

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Patches & Fixes for CVE-2024-43845 (1)

Other References for CVE-2024-43845 (3)

Same Patch Batch · Linux · 2024-08-17 · 109 CVEs total

CVE-2024-42285 9.8 CRITICAL RDMA/iwcm: Fix a use-after-free related to destroying CM IDs
CVE-2024-42284 9.1 CRITICAL tipc: Return non-zero value from tipc_udp_addr2str() on error
CVE-2024-42318 8.8 HIGH landlock: Don't lose track of restrictions on cred_transfer
CVE-2024-42287 8.8 HIGH scsi: qla2xxx: Complete command early within lock
CVE-2024-43847 8.8 HIGH wifi: ath12k: fix invalid memory access while processing fragmented packets
CVE-2024-43848 8.8 HIGH wifi: mac80211: fix TTLM teardown work
CVE-2024-42279 7.8 HIGH spi: microchip-core: ensure TX and RX FIFOs are empty at start of a transfer
CVE-2024-43832 7.8 HIGH s390/uv: Don't call folio_wait_writeback() without a folio reference
CVE-2024-42297 7.8 HIGH f2fs: fix to don't dirty inode for readonly filesystem
CVE-2024-42314 7.8 HIGH btrfs: fix extent map use-after-free when adding pages to compressed bio
CVE-2024-42296 7.8 HIGH f2fs: fix return value of f2fs_convert_inline_inode()
CVE-2024-43840 7.8 HIGH bpf, arm64: Fix trampoline for BPF_TRAMP_F_CALL_ORIG
CVE-2024-42293 7.8 HIGH arm64: mm: Fix lockless walks with static and dynamic page-table folding
CVE-2024-43830 7.8 HIGH leds: trigger: Unregister sysfs attributes before calling deactivate()
CVE-2024-42299 7.8 HIGH fs/ntfs3: Update log->page_{mask,bits} if log->page_size changed
CVE-2024-42300 7.8 HIGH erofs: fix race in z_erofs_get_gbuf()
CVE-2024-42288 7.8 HIGH scsi: qla2xxx: Fix for possible memory corruption
CVE-2024-43846 7.8 HIGH lib: objagg: Fix general protection fault
CVE-2024-42280 7.8 HIGH mISDN: Fix a use after free in hfcmulti_tx()
CVE-2024-42306 7.8 HIGH udf: Avoid using corrupted block bitmap buffer

Showing top 20 of 109 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-43845

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