Security Vulnerabilities - CVEs Published In June 2024
In the Linux kernel, the following vulnerability has been resolved:
net: ks8851: Queue RX packets in IRQ handler instead of disabling BHs
Currently the driver uses local_bh_disable()/local_bh_enable() in its
IRQ handler to avoid triggering net_rx_action() softirq on exit from
netif_rx(). The net_rx_action() could trigger this driver .start_xmit
callback, which is protected by the same lock as the IRQ handler, so
calling the .start_xmit from netif_rx() from the IRQ handler critical
section protected by the lock could lead to an attempt to claim the
already claimed lock, and a hang.
The local_bh_disable()/local_bh_enable() approach works only in case
the IRQ handler is protected by a spinlock, but does not work if the
IRQ handler is protected by mutex, i.e. this works for KS8851 with
Parallel bus interface, but not for KS8851 with SPI bus interface.
Remove the BH manipulation and instead of calling netif_rx() inside
the IRQ handler code protected by the lock, queue all the received
SKBs in the IRQ handler into a queue first, and once the IRQ handler
exits the critical section protected by the lock, dequeue all the
queued SKBs and push them all into netif_rx(). At this point, it is
safe to trigger the net_rx_action() softirq, since the netif_rx()
call is outside of the lock that protects the IRQ handler.
CVSS Score
5.5
EPSS Score
0.002
Published
2024-06-03
In the Linux kernel, the following vulnerability has been resolved:
tracefs: Reset permissions on remount if permissions are options
There's an inconsistency with the way permissions are handled in tracefs.
Because the permissions are generated when accessed, they default to the
root inode's permission if they were never set by the user. If the user
sets the permissions, then a flag is set and the permissions are saved via
the inode (for tracefs files) or an internal attribute field (for
eventfs).
But if a remount happens that specify the permissions, all the files that
were not changed by the user gets updated, but the ones that were are not.
If the user were to remount the file system with a given permission, then
all files and directories within that file system should be updated.
This can cause security issues if a file's permission was updated but the
admin forgot about it. They could incorrectly think that remounting with
permissions set would update all files, but miss some.
For example:
# cd /sys/kernel/tracing
# chgrp 1002 current_tracer
# ls -l
[..]
-rw-r----- 1 root root 0 May 1 21:25 buffer_size_kb
-rw-r----- 1 root root 0 May 1 21:25 buffer_subbuf_size_kb
-r--r----- 1 root root 0 May 1 21:25 buffer_total_size_kb
-rw-r----- 1 root lkp 0 May 1 21:25 current_tracer
-rw-r----- 1 root root 0 May 1 21:25 dynamic_events
-r--r----- 1 root root 0 May 1 21:25 dyn_ftrace_total_info
-r--r----- 1 root root 0 May 1 21:25 enabled_functions
Where current_tracer now has group "lkp".
# mount -o remount,gid=1001 .
# ls -l
-rw-r----- 1 root tracing 0 May 1 21:25 buffer_size_kb
-rw-r----- 1 root tracing 0 May 1 21:25 buffer_subbuf_size_kb
-r--r----- 1 root tracing 0 May 1 21:25 buffer_total_size_kb
-rw-r----- 1 root lkp 0 May 1 21:25 current_tracer
-rw-r----- 1 root tracing 0 May 1 21:25 dynamic_events
-r--r----- 1 root tracing 0 May 1 21:25 dyn_ftrace_total_info
-r--r----- 1 root tracing 0 May 1 21:25 enabled_functions
Everything changed but the "current_tracer".
Add a new link list that keeps track of all the tracefs_inodes which has
the permission flags that tell if the file/dir should use the root inode's
permission or not. Then on remount, clear all the flags so that the
default behavior of using the root inode's permission is done for all
files and directories.
CVSS Score
7.8
EPSS Score
0.002
Published
2024-06-03
In the Linux kernel, the following vulnerability has been resolved:
fs/9p: only translate RWX permissions for plain 9P2000
Garbage in plain 9P2000's perm bits is allowed through, which causes it
to be able to set (among others) the suid bit. This was presumably not
the intent since the unix extended bits are handled explicitly and
conditionally on .u.
CVSS Score
5.5
EPSS Score
0.002
Published
2024-06-03
A client-side enforcement of server-side security in Fortinet FortiPortal version 6.0.0 through 6.0.14 allows attacker to improper access control via crafted HTTP requests.
CVSS Score
4.3
EPSS Score
0.005
Published
2024-06-03
An exposure of sensitive information to an unauthorized actor vulnerability [CWE-200] in FortiWeb version 7.4.0, version 7.2.4 and below, version 7.0.8 and below, 6.3 all versions may allow an authenticated attacker to read password hashes of other administrators via CLI commands.
CVSS Score
5.5
EPSS Score
0.002
Published
2024-06-03
Silverpeas before 6.3.5 allows authentication bypass by omitting the Password field to AuthenticationServlet, often providing an unauthenticated user with superadmin access.
CVSS Score
9.8
EPSS Score
0.009
Published
2024-06-03
In modem, there is a possible information disclosure due to using risky cryptographic algorithm during connection establishment negotiation. This could lead to remote information disclosure, when weak encryption algorithm is used, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY00942482; Issue ID: MSV-1469.
CVSS Score
5.1
EPSS Score
0.001
Published
2024-06-03
In wlan driver, there is a possible out of bounds read due to improper input validation. This could lead to local information disclosure with System execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00364733; Issue ID: MSV-1331.
CVSS Score
4.4
EPSS Score
0.002
Published
2024-06-03
In wlan driver, there is a possible out of bounds write due to improper input validation. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00364732; Issue ID: MSV-1332.
CVSS Score
6.6
EPSS Score
0.004
Published
2024-06-03
In wlan service, there is a possible out of bounds write due to improper input validation. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00367704; Issue ID: MSV-1411.
CVSS Score
6.6
EPSS Score
0.004
Published
2024-06-03