Multiple vulnerabilities in Linux Kernel
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 8 |
| CVE-ID | CVE-2016-10318 CVE-2016-0758 CVE-2016-7097 CVE-2016-7042 CVE-2016-7039 CVE-2016-8630 CVE-2016-4565 CVE-2015-8970 |
| CWE-ID | CWE-862 CWE-190 CWE-264 CWE-131 CWE-400 CWE-476 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Linux kernel Operating systems & Components / Operating system linux_kernel (Debian package) Operating systems & Components / Operating system package or component |
| Vendor |
Linux Foundation Debian |
Security Bulletin
This security bulletin contains information about 8 vulnerabilities.
1) Missing authorization
EUVDB-ID: #VU12316
Risk: Medium
CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2016-10318
CWE-ID:
CWE-862 - Missing Authorization
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to cause DoS condition on the target system.
The weakness exists in the fscrypt_process_policy function in fs/crypto/policy.c in the ext4 and f2fs filesystem encryption support due to missing authorization check. A remote attacker can assign an encryption policy to a directory owned by a different user and cause the service to crash.
Update to version 4.7.4.
Vulnerable software versionsLinux kernel: 4.7.0 - 4.7.3
External linksQ & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Integer overflow
EUVDB-ID: #VU456
Risk: Low
CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2016-0758
CWE-ID:
CWE-190 - Integer overflow
Exploit availability: No
DescriptionThe vulnerability allows a local attacker to gain elevated privileges on the target system.
The weakness exists in lib/asn1_decoder.c due to integer overflow. A local attacker can submit specially crafted ASN.1 data and gain root privileges.
Update to version 4.6.
Vulnerable software versionsLinux kernel: 4.5.0 - 4.5.7
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) Privilege escalation
EUVDB-ID: #VU5388
Risk: Low
CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2016-7097
CWE-ID:
CWE-264 - Permissions, Privileges, and Access Controls
Exploit availability: No
DescriptionThe vulnerability allows a local attacker to gain elevated privileges on the target system.
The weakness exists due to the setgid bit being preserved during a setxattr call by the filesystem implementation. A local attacker can leverage the existence of a setgid program to gain group privileges.
Successful exploitation of the vulnerability results in privileges escalation.
Update to version 4.9.6.
Linux kernel: 4.0.1 - 4.8.2
External linkshttp://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.6
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.1.37
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.
4) Denial of service
EUVDB-ID: #VU1012
Risk: Low
CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2016-7042
CWE-ID:
CWE-131 - Incorrect Calculation of Buffer Size
Exploit availability: No
DescriptionThe vulnerability allows a local user to cause DoS conditions on the target system.
The weakness exists due to using of incorrect buffer size for certain timeout data by the proc_keys_show function in security/keys/proc.c while enabling of GNU Compiler Collection (gcc) stack protector. By reading the /proc/keys file attackers can trigger stack memory corruption.
Successful exploitation of the vulnerability may result in denial of service on the vulnerable system.
Update to version 4.8.2.
Vulnerable software versionsLinux kernel: 3.2.78-1 - 4.8.1
linux_kernel (Debian package): 4.7.2-1
External linkshttp://bugzilla.redhat.com/show_bug.cgi?id=1373966
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.
5) Resource exhaustion
EUVDB-ID: #VU1174
Risk: Medium
CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2016-7039
CWE-ID:
CWE-400 - Resource exhaustion
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to cause DoS condition on the target system.
The weakness exists in the IP stack due to stack consumption. A remote attacker can trigger use of the GRO path for large crafted packets, as demonstrated by packets that contain only VLAN headers, and cause the service to crash.
Update to version 4.8.3.
Vulnerable software versionsLinux kernel: 4.1.1 - 4.8.2
External linkshttp://www.openwall.com/lists/oss-security/2016/10/10/15
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.1.37
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
6) NULL pointer dereference
EUVDB-ID: #VU1171
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-2016-8630
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 in the x86_decode_insn function in arch/x86/kvm/emulate.c due to NULL pointer dereference when KVM is enabled. A local attacker can cause the service to crash via a certain use of a ModR/M byte in an undefined instruction.
Update to version 4.8.7.
Vulnerable software versionsLinux kernel: 4.8 - 4.8.6
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.
7) Privilege escalation
EUVDB-ID: #VU3829
Risk: Low
CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2016-4565
CWE-ID:
CWE-264 - Permissions, Privileges, and Access Controls
Exploit availability: No
DescriptionThe vulnerability allows a local attacker to cause DoS condition or gain elevated privileges on the target system.
The weakness exists due to it incorrectly relies on the write system call. A local attacker can cause the service to crash or gain root privileges.
Update to version 4.5.3.
Vulnerable software versionsLinux kernel: 4.5.0 - 4.5.2
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.
8) Null pointer dereference
EUVDB-ID: #VU8116
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-2015-8970
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 crypto/algif_skcipher.c in the Linux kernel does not verify that a setkey operation has been performed on an AF_ALG socket before an accept system call is processed. A local attacker can provide a specially crafted application that does not supply a key, related to the lrw_crypt function in crypto/lrw.c., trigger NULL pointer dereference and cause the system to crash.
Successful exploitation of the vulnerability results in denial of service.
Update to version 4.5.
Linux kernel: 4.0.1 - 4.4.86
External linkshttp://www.openwall.com/lists/oss-security/2016/11/04/3
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.
