Red Hat update for kernel
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2017-14106 CVE-2018-3639 |
| CWE-ID | CWE-369 CWE-362 |
| Exploitation vector | Local |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) Operating systems & Components / Operating system Red Hat Enterprise Linux Server - Extended Life Cycle Support Operating systems & Components / Operating system kernel (Red Hat package) Operating systems & Components / Operating system package or component |
| Vendor | Red Hat Inc. |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Divide by zero
EUVDB-ID: #VU8922
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-2017-14106
CWE-ID:
CWE-369 - Divide By Zero
Exploit availability: No
DescriptionThe vulnerability allows a local attacker to cause DoS condition on the target system.
The weakness exists due to divide-by-zero error in the tcp_disconnect() function in net/ipv4/tcp.c. A local attacker can trigger a disconnect within a certain tcp_recvmsg code path and cause kernel panic.
Successful exploitation of the vulnerability results in denial of service.
Install update from vendor's website.
Vulnerable software versionsRed Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems): 5.0
Red Hat Enterprise Linux Server - Extended Life Cycle Support: 5.0
kernel (Red Hat package): 2.6.18-8.1.1.el5 - 2.6.18-431.el5
External linkshttp://access.redhat.com/errata/RHSA-2018:2172
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) Speculative Store Bypass
EUVDB-ID: #VU12911
Risk: Low
CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2018-3639
Exploit availability: No
DescriptionThe vulnerability allows a local attacker to obtain potentially sensitive information on the target system.
The weakness exists due to race conditions in CPU cache processing. A local attacker can conduct a side-channel attack to exploit a flaw in the speculative execution of Load and Store instructions to read privileged memory.
Note: the vulnerability is referred to as "Spectre variant 4".
Install update from vendor's website.
Vulnerable software versionsRed Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems): 5.0
Red Hat Enterprise Linux Server - Extended Life Cycle Support: 5.0
kernel (Red Hat package): 2.6.18-8.1.1.el5 - 2.6.18-431.el5
External linkshttp://access.redhat.com/errata/RHSA-2018:2172
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.
