Security Vulnerabilities - CVEs Published In October 2024
In the Linux kernel, the following vulnerability has been resolved:
mm/mremap: fix move_normal_pmd/retract_page_tables race
In mremap(), move_page_tables() looks at the type of the PMD entry and the
specified address range to figure out by which method the next chunk of
page table entries should be moved.
At that point, the mmap_lock is held in write mode, but no rmap locks are
held yet. For PMD entries that point to page tables and are fully covered
by the source address range, move_pgt_entry(NORMAL_PMD, ...) is called,
which first takes rmap locks, then does move_normal_pmd().
move_normal_pmd() takes the necessary page table locks at source and
destination, then moves an entire page table from the source to the
destination.
The problem is: The rmap locks, which protect against concurrent page
table removal by retract_page_tables() in the THP code, are only taken
after the PMD entry has been read and it has been decided how to move it.
So we can race as follows (with two processes that have mappings of the
same tmpfs file that is stored on a tmpfs mount with huge=advise); note
that process A accesses page tables through the MM while process B does it
through the file rmap:
process A process B
========= =========
mremap
mremap_to
move_vma
move_page_tables
get_old_pmd
alloc_new_pmd
*** PREEMPT ***
madvise(MADV_COLLAPSE)
do_madvise
madvise_walk_vmas
madvise_vma_behavior
madvise_collapse
hpage_collapse_scan_file
collapse_file
retract_page_tables
i_mmap_lock_read(mapping)
pmdp_collapse_flush
i_mmap_unlock_read(mapping)
move_pgt_entry(NORMAL_PMD, ...)
take_rmap_locks
move_normal_pmd
drop_rmap_locks
When this happens, move_normal_pmd() can end up creating bogus PMD entries
in the line `pmd_populate(mm, new_pmd, pmd_pgtable(pmd))`. The effect
depends on arch-specific and machine-specific details; on x86, you can end
up with physical page 0 mapped as a page table, which is likely
exploitable for user->kernel privilege escalation.
Fix the race by letting process B recheck that the PMD still points to a
page table after the rmap locks have been taken. Otherwise, we bail and
let the caller fall back to the PTE-level copying path, which will then
bail immediately at the pmd_none() check.
Bug reachability: Reaching this bug requires that you can create
shmem/file THP mappings - anonymous THP uses different code that doesn't
zap stuff under rmap locks. File THP is gated on an experimental config
flag (CONFIG_READ_ONLY_THP_FOR_FS), so on normal distro kernels you need
shmem THP to hit this bug. As far as I know, getting shmem THP normally
requires that you can mount your own tmpfs with the right mount flags,
which would require creating your own user+mount namespace; though I don't
know if some distros maybe enable shmem THP by default or something like
that.
Bug impact: This issue can likely be used for user->kernel privilege
escalation when it is reachable.
CVSS Score
7.0
EPSS Score
0.0
Published
2024-10-23
IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) 10.5, 11.1, and 11.5 is vulnerable to a denial of service, under specific configurations, as the server may crash when using a specially crafted SQL statement by an authenticated user.
CVSS Score
5.3
EPSS Score
0.002
Published
2024-10-23
The WooCommerce Order Proposal plugin for WordPress is vulnerable to privilege escalation via order proposal in all versions up to and including 2.0.5. This is due to the improper implementation of allow_payment_without_login function. This makes it possible for authenticated attackers, with Shop Manager-level access and above, to log in to WordPress as an arbitrary user account, including administrators.
CVSS Score
7.2
EPSS Score
0.001
Published
2024-10-23
Incorrect Default Permissions vulnerability in GenBroker32, which is included in the installers for ICONICS GENESIS64 version 10.97.3 and prior, Mitsubishi Electric GENESIS64 version 10.97.3 and prior and Mitsubishi Electric MC Works64 all versions allows a local authenticated attacker to disclose or tamper with confidential information and data contained in the products, or cause a denial of service (DoS) condition on the products, by accessing a folder with incorrect permissions, when GenBroker32 is installed on the same PC as GENESIS64 or MC Works64.
CVSS Score
7.8
EPSS Score
0.0
Published
2024-10-22
Cross Site Scripting vulnerability in camaleon-cms v.2.7.5 allows remote attacker to execute arbitrary code via the content group name field.
CVSS Score
4.8
EPSS Score
0.046
Published
2024-10-22
Cross Site Scripting vulnerability in student management system in php with source code v.1.0.0 allows a remote attacker to execute arbitrary code.
CVSS Score
4.8
EPSS Score
0.001
Published
2024-10-22
SQL Injection vulnerability in hospital management system in php with source code v.1.0.0 allows a remote attacker to execute arbitrary code.
CVSS Score
7.2
EPSS Score
0.003
Published
2024-10-22
SQL Injection vulnerability in Online Complaint Site v.1.0 allows a remote attacker to escalate privileges via the username and password parameters in the /admin.index.php component.
CVSS Score
9.8
EPSS Score
0.153
Published
2024-10-22
itsourcecode Loan Management System v1.0 is vulnerable to Cross Site Scripting (XSS) via a crafted payload to the lastname, firstname, middlename, address, contact_no, email and tax_id parameters in new borrowers functionality on the Borrowers page.
CVSS Score
5.0
EPSS Score
0.004
Published
2024-10-22
Type Confusion in V8 in Google Chrome prior to 130.0.6723.69 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)
CVSS Score
8.8
EPSS Score
0.002
Published
2024-10-22