Multiple vulnerabilities in Linux Kernel
| Risk | Low |
| Patch available | NO |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2018-7755 CVE-2018-7740 |
| CWE-ID | CWE-264 CWE-119 |
| Exploitation vector | Local |
| Public exploit | Public exploit code for vulnerability #2 is available. |
| Vulnerable software Subscribe |
Linux kernel Operating systems & Components / Operating system |
| Vendor | Linux Foundation |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Security restrictions bypass
EUVDB-ID: #VU10918
Risk: Low
CVSSv3.1: 3.5 [CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2018-7755
CWE-ID:
CWE-264 - Permissions, Privileges, and Access Controls
Exploit availability: No
DescriptionThe vulnerability allows a local unauthenticated attacker to bypass security restrictions on the target system.
The weakness exists in the drivers/block/floppy.c source code in the fd_locked_ioctl function due to insufficient security restrictions. A local attacker can bypass security restrictions through the system floppy drive and obtain kernel code and data from the system.
Install updates from vendor's website.
Linux kernel: 2.4.13 - 4.15.7
External linkshttp://lkml.org/lkml/2018/3/7/1116
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.74
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.160
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.131
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.12
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.
2) Memory corruption
EUVDB-ID: #VU10922
Risk: Low
CVSSv3.1: 6.2 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:P/RL:U/RC:C]
CVE-ID: CVE-2018-7740
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: No
DescriptionThe vulnerability allows a local attacker to cause DoS condition no the target system.
The weakness exists in the resv_map_release function due to boundary error when handling user-supplied input. A local attacker can execute an application that submits malicious input, trigger memory corruption and cause the system to crash.
Cybersecurity Help is currently unaware of any solutions addressing the vulnerability.
Linux kernel: 4.15.0 - 4.15.7
External linkshttp://bugzilla.kernel.org/show_bug.cgi?id=199037
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.
