Denial of service in Linux Kernel
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 5 |
| CVE-ID | CVE-2018-1092 CVE-2017-18255 CVE-2018-1094 CVE-2018-1095 CVE-2018-1093 |
| CWE-ID | CWE-476 CWE-190 CWE-125 |
| Exploitation vector | Local |
| Public exploit |
Public exploit code for vulnerability #1 is available. Public exploit code for vulnerability #3 is available. Public exploit code for vulnerability #4 is available. |
| Vulnerable software Subscribe |
Linux kernel Operating systems & Components / Operating system |
| Vendor | Linux Foundation |
Security Bulletin
This security bulletin contains information about 5 vulnerabilities.
1) NULL pointer dereference
EUVDB-ID: #VU11518
Risk: Low
CVSSv3.1: 5.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:P/RL:O/RC:C]
CVE-ID: CVE-2018-1092
CWE-ID:
CWE-476 - NULL Pointer Dereference
Exploit availability: No
DescriptionThe vulnerability allows a local attacker to cause DoS condition on the target system.
The weakness exists due to improper processing of a customized ext4 image when using the ext4_iget function, as defined in the fs/ext4/inode.c source code file. A local attacker can mount a customized ext4 image, trigger NULL pointer dereference and an Out-of-Process Space (OOPS) kernel memory error and cause the service to crash.
Install update from vendor's website.
Vulnerable software versionsLinux kernel: 4.0.1 - 4.15.15
External linkshttp://bugzilla.kernel.org/show_bug.cgi?id=199179
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
2) Integer overflow
EUVDB-ID: #VU11519
Risk: Low
CVSSv3.1: 5.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-18255
CWE-ID:
CWE-190 - Integer overflow
Exploit availability: No
DescriptionThe vulnerability allows a local attacker to cause DoS condition on the target system.
The weakness exists due to improper validation of the input value from userspace when using the perf_cpu_time_max_percent_handler function, as defined in the kernel/events/core.c source code file. A local attacker can send specially crafted input that contains large values, trigger integer overflow and cause the service to crash.
Update to version 4.11 or later.
Vulnerable software versionsLinux kernel: 4.0.1 - 4.10.15
External linksQ & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) NULL pointer dereference
EUVDB-ID: #VU11520
Risk: Low
CVSSv3.1: 5.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:P/RL:O/RC:C]
CVE-ID: CVE-2018-1094
CWE-ID:
CWE-476 - NULL Pointer Dereference
Exploit availability: No
DescriptionThe vulnerability allows a local attacker to cause DoS condition on the target system.
The weakness exists due to improper initialization of the crc32c checksum driver when using the ext4_fill_super function, as defined in the fs/ext4/super.c source code file. A local attacker can mount a customized ext4 image, trigger NULL pointer dereference in the ext4/xattr.c:ext4_xattr_inode_hash() function and cause the service to crash.
Install update from vendor's website.
Vulnerable software versionsLinux kernel: 4.0.1 - 4.15.15
External linkshttp://bugzilla.kernel.org/show_bug.cgi?id=199183
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
4) NULL pointer dereference
EUVDB-ID: #VU11521
Risk: Low
CVSSv3.1: 5.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:P/RL:O/RC:C]
CVE-ID: CVE-2018-1095
CWE-ID:
CWE-476 - NULL Pointer Dereference
Exploit availability: No
DescriptionThe vulnerability allows a local attacker to cause DoS condition on the target system.
The weakness exists due to improper validation of xattr sizes when using the ext4_xattr_check_entries function, as defined in the fs/ext4/super.c source code file. A local attacker can mount a malicious ext4 image, trigger NULL pointer dereference in the fs/posix_acl.c:get_acl() function and cause the service to crash.
Install update from vendor's website.
Vulnerable software versionsLinux kernel: 4.0.1 - 4.15.15
External linkshttp://bugzilla.kernel.org/show_bug.cgi?id=199185
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
5) Out-of-bounds read
EUVDB-ID: #VU11524
Risk: Low
CVSSv3.1: 5.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2018-1093
CWE-ID:
CWE-125 - Out-of-bounds read
Exploit availability: No
DescriptionThe vulnerability allows a local attacker to cause DoS condition on the target system.
The weakness exists due to improper validation of bitmap block numbers by the balloc.c and ialloc.c source codes. A local attacker can mount a customized ext4 image, trigger out-of-bounds read in the ext4/balloc.c:ext4_valid_block_bitmap() function ans cause the service to crash.
Install update from vendor's website.
Vulnerable software versionsLinux kernel: 4.0.1 - 4.15.15
External linkshttp://bugzilla.kernel.org/show_bug.cgi?id=199181
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
