| CVE |
Vendors |
Products |
Updated |
CVSS v3.1 |
| In the Linux kernel, the following vulnerability has been resolved:
xfs: fix exchange-range-to-eof file size exchange
Norbert Szetei posted a patch containing an incomplete description of a
bug in XFS_IOC_EXCHANGE_RANGE's TO_EOF flag. The bug tricks
exchange-range into modifying a file so that it has shared blocks
starting beyond EOF, which is never allowed because files never have
written data beyond EOF, and you can only share written data blocks.
This is key to all the incorrect behavior that follows.
Eventually I got from Norbert a description of what's going wrong:
> Fair. Here it is with physical block numbers, 4k blocks. peer is the file
> that gets rewritten and file1 is the one that ends up with the flag
> cleared.
>
> Start, nothing shared:
>
> peer size 4096 -> [100]
> file1 size 12288 -> [200] [201] [202]
> donor1 size 4096 -> [300]
> donor2 size 4096 -> [400]
>
> 1. FICLONERANGE peer's block into file1's middle slot:
>
> peer size 4096 -> [100]
> file1 size 12288 -> [200] [100] [202] reflink flag set
> ^^^^^ both files own block 100
>
> 2. XFS_IOC_EXCHANGE_RANGE file1 against donor1, file1_offset 0,
> file2_offset 8192, length 0, TO_EOF. One block is exchanged, and the sizes
> are exchanged with it:
>
> file1 size 4096 -> [200] [100] [300] reflink flag set
> ^^^^^^^^^^^ still owned, now past the size
> donor1 size 12288 -> [202]
>
> file1 says it is one block long while it still owns three. Nothing was
> unmapped. file2_offset is block 2, so this exchange cannot clear a flag.
>
> 3. XFS_IOC_EXCHANGE_RANGE file1 against donor2, both offsets 0, length 4096.
> By i_disk_size this is two one-block files exchanging everything, so
> xmi_can_exchange_reflink_flags() agrees and the flag is cleared:
>
> file1 size 4096 -> [400] [100] [300] reflink flag CLEARED
> donor2 size 4096 -> [200]
>
> Block 100 is still shared with peer.
>
> 4. pwrite(file1, 4096, 4096), which is file1's second slot, block 100.
> xfs_is_cow_inode(file1) is false, so no CoW:
>
> peer size 4096 -> [100] same block, new contents
>
> Block 100 is the only one that matters here. PoC below, it reads a file
> called peer in the current directory. The filesystem needs reflink and
> exchange-range, which mkfs.xfs 7.x turns on by default.
So yes, TO_EOF is screwing up the file size even if it's actually
exchanging the data block correctly. The following is the intended
behavior of XFS_EXCHANGE_RANGE_TO_EOF, as described by its manpage:
"Ignore the length parameter. All bytes in file1_fd from file1_offset
to EOF are moved to file2_fd, and file2's size is set to
(file2_offset+(file1_length-file1_offset)). Meanwhile, all bytes in
file2 from file2_offset to EOF are moved to file1 and file1's size is
set to (file1_offset+(file2_length-file2_offset))."
In other words, if we only exchange a portion of the file data, then we
should only exchange the portion of the file size that relates to the
exchanged data. Unfortunately, the code swaps the ondisk file size and
the incore file sizes, which is incorrect if the caller passes in a
nonzero offset.
Having confused the file sizes, the PoC uses a second exchange-range
call on what looks like a non-reflinked single-block file. Because the
file size is set incorrectly, exchange-range thinks it's exchanging the
full contents of two files and clears the reflink flag on the broken
file. That enables an extending write of the broken file to rewrite the
shared block that's just past EOF. This has become known colloquially
as refluxfs.
Once the file sizes are set correctly, the second exchange-range no
longer thinks that it's doing a full-contents swap, so it won't clear
the reflink flag on either of its file arguments.
Norbert followed up to an earlier version of this patch with a second
complaint about us not handling the i_disk_size state correctly:
> The offsets are bounded against the incore i_size but subtracted from
>
---truncated--- |
| In the Linux kernel, the following vulnerability has been resolved:
sched/cache: Decouple sched_cache_group from mm to fix UAF
Currently the sched cache grouping is by mm and the scheduling statistics
sched_cache_stat lives in the mm structure. This ties the life cycle
of scheduling stats with mm.
In account_mm_sched(), the scheduling stats are accessed by
task->mm->sc_stat. However, a task may be switching mm on one CPU when
another CPU is running account_mm_sched(), and possibly accessing the
old mm that was freed. This problem was found when running tests with
KASAN by Hyunwoo:
https://lore.kernel.org/lkml/apPb-Dr4nPYuHQOK@v4bel/
Instead of serializing the mm access by introducing extra acquisition of
rq lock in the mm free path, extract sched_cache_stat from mm_struct,
rename it as sched_cache_group and manage its life cycle apart from
mm_struct with its own ref counting. This allows us in the next patch
access sched_cache_group directly from task, and add a refcount
on sched_cache_group when a task links to it. This prevents the use
after free issue when accessing stale and released old mm and its
sched cache stat a task switches to a new mm while account_mm_sched()
is done elsewhere.
The other benefit of this restructure is in the future, the grouping of
tasks to a LLC would have the flexibility to be associated with a user
defined grouping, or cgroup, cookie group, numa_group or others instead
of just with a single mm address space.
Rename sched_cache_stat to sched_cache_group and turn it into a refcounted
object allocated from mm_struct. The mm_struct now holds a pointer
(sched_cache_grp) to this object instead of embedding it. |
| Use after free in Remote Desktop Client allows an unauthorized attacker to execute code over a network. |
| Use after free in Remote Desktop Client allows an unauthorized attacker to execute code over a network. |
| Use of uninitialized resource in Windows Win32 Kernel Subsystem allows an authorized attacker to disclose information locally. |
| Vulnerability in the Oracle Risk Management product of Oracle E-Business Suite (component: Internal Operations). Supported versions that are affected are 12.2.3-12.2.15. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Risk Management. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Risk Management accessible data as well as unauthorized access to critical data or complete access to all Oracle Risk Management accessible data. CVSS 3.1 Base Score 8.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N). |
| Vulnerability in the Oracle Trading Community product of Oracle E-Business Suite (component: Party Search UI). Supported versions that are affected are 12.2.3-12.2.15. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Trading Community. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Trading Community accessible data as well as unauthorized access to critical data or complete access to all Oracle Trading Community accessible data. CVSS 3.1 Base Score 8.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N). |
| Vulnerability in the Oracle Process Manufacturing Logistics product of Oracle E-Business Suite (component: Internal Operations). Supported versions that are affected are 12.2.3-12.2.15. Difficult to exploit vulnerability allows high privileged attacker with network access via HTTP to compromise Oracle Process Manufacturing Logistics. While the vulnerability is in Oracle Process Manufacturing Logistics, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of Oracle Process Manufacturing Logistics. CVSS 3.1 Base Score 8.0 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H). |
| Vulnerability in the Oracle Landed Cost Management product of Oracle E-Business Suite (component: Internal Operations). Supported versions that are affected are 12.2.3-12.2.15. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Landed Cost Management. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Landed Cost Management accessible data as well as unauthorized access to critical data or complete access to all Oracle Landed Cost Management accessible data. CVSS 3.1 Base Score 8.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N). |
| Vulnerability in the Oracle Process Manufacturing Systems product of Oracle E-Business Suite (component: Internal Operations). Supported versions that are affected are 12.2.3-12.2.15. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Process Manufacturing Systems. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Process Manufacturing Systems accessible data as well as unauthorized access to critical data or complete access to all Oracle Process Manufacturing Systems accessible data. CVSS 3.1 Base Score 8.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N). |
| Vulnerability in the Oracle US Federal Human Resources product of Oracle E-Business Suite (component: Internal Operations). Supported versions that are affected are 12.2.3-12.2.15. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle US Federal Human Resources. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle US Federal Human Resources accessible data as well as unauthorized access to critical data or complete access to all Oracle US Federal Human Resources accessible data. CVSS 3.1 Base Score 8.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N). |
| Vulnerability in the Oracle Scripting product of Oracle E-Business Suite (component: Internal Operations). Supported versions that are affected are 12.2.3-12.2.15. Easily exploitable vulnerability allows high privileged attacker with network access via HTTP to compromise Oracle Scripting. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Scripting accessible data as well as unauthorized access to critical data or complete access to all Oracle Scripting accessible data. CVSS 3.1 Base Score 6.5 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N). |
| Vulnerability in the Oracle E-Business Tax product of Oracle E-Business Suite (component: Internal Operations). Supported versions that are affected are 12.2.3-12.2.15. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle E-Business Tax. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle E-Business Tax accessible data as well as unauthorized access to critical data or complete access to all Oracle E-Business Tax accessible data. CVSS 3.1 Base Score 8.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N). |
| Vulnerability in the Oracle Public Sector Human Resources product of Oracle E-Business Suite (component: Regression Testing). Supported versions that are affected are 12.2.3-12.2.15. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Public Sector Human Resources. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Public Sector Human Resources accessible data as well as unauthorized access to critical data or complete access to all Oracle Public Sector Human Resources accessible data. CVSS 3.1 Base Score 8.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N). |
| Vulnerability in the Oracle SDP Number Portability product of Oracle E-Business Suite (component: Internal Operations). Supported versions that are affected are 12.2.3-12.2.15. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle SDP Number Portability. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle SDP Number Portability accessible data as well as unauthorized access to critical data or complete access to all Oracle SDP Number Portability accessible data. CVSS 3.1 Base Score 8.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N). |
| Vulnerability in the Oracle HCM Configuration Workbench product of Oracle E-Business Suite (component: Rapid Implementation). Supported versions that are affected are 12.2.3-12.2.15. Easily exploitable vulnerability allows high privileged attacker with network access via HTTP to compromise Oracle HCM Configuration Workbench. Successful attacks of this vulnerability can result in takeover of Oracle HCM Configuration Workbench. CVSS 3.1 Base Score 7.2 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H). |
| Vulnerability in the Oracle Payroll product of Oracle E-Business Suite (component: Internal Operations). Supported versions that are affected are 12.2.3-12.2.15. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Payroll. Successful attacks of this vulnerability can result in takeover of Oracle Payroll. CVSS 3.1 Base Score 8.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H). |
| Vulnerability in the Oracle Payroll product of Oracle E-Business Suite (component: Internal Operations). Supported versions that are affected are 12.2.3-12.2.15. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Payroll. Successful attacks of this vulnerability can result in takeover of Oracle Payroll. CVSS 3.1 Base Score 8.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H). |
| Vulnerability in the Oracle Work in Process product of Oracle E-Business Suite (component: Internal Operations). Supported versions that are affected are 12.2.3-12.2.15. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Work in Process. Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Oracle Work in Process, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle Work in Process accessible data as well as unauthorized update, insert or delete access to some of Oracle Work in Process accessible data. CVSS 3.1 Base Score 7.6 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N). |
| Vulnerability in the Oracle Work in Process product of Oracle E-Business Suite (component: Internal Operations). Supported versions that are affected are 12.2.3-12.2.15. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle Work in Process. Successful attacks of this vulnerability can result in takeover of Oracle Work in Process. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H). |
