Red Hat update for kernel-rt
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 4 |
| CVE-ID | CVE-2017-1000364 CVE-2017-6214 CVE-2017-7645 CVE-2017-7895 |
| CWE-ID | CWE-119 CWE-835 CWE-20 |
| Exploitation vector | Network |
| Public exploit | Public exploit code for vulnerability #1 is available. |
| Vulnerable software Subscribe |
kernel-rt (Red Hat package) Operating systems & Components / Operating system package or component MRG Realtime Server applications / Application servers |
| Vendor |
Red Hat Inc. |
Security Bulletin
This security bulletin contains information about 4 vulnerabilities.
1) Memory corruption
EUVDB-ID: #VU7131
Risk: Medium
CVSSv3.1: 8.2 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:F/RL:O/RC:C]
CVE-ID: CVE-2017-1000364
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: Yes
Description
The vulnerability allows a local attacker to gain elevated privileges on the target system.
The vulnerability exists due to memory management errors in implementation of various functions under multiple operating systems. A local or remote attacker can trigger the affected application to process specially crafted data, trigger memory corruption and execute arbitrary code on the target system. The vulnerability is dubbed by Qualys researchers as “Stack Clash”.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
MitigationInstall updates from vendor's website.
kernel-rt (Red Hat package): 3.10.0-229.rt56.144.el6rt - 3.10.0-514.rt56.221.el6rt
MRG Realtime: 2
:
External linkshttp://access.redhat.com/errata/RHSA-2017:1647
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, a fully functional exploit for this vulnerability is available.
2) Infinite loop
EUVDB-ID: #VU6651
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-2017-6214
CWE-ID:
CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform denial of service (DoS) attack.
The vulnerability exists due to an error in tcp_splice_read() function in net/ipv4/tcp.c in Linux kernel before 4.9.11. A remote attacker can send a specially crafted TCP packet with the URG flag and trigger infinite loop.
Successful exploitation of the vulnerability may allow an attacker to perform denial of service (DoS) attack.
Install updates from vendor's website.
kernel-rt (Red Hat package): 3.10.0-229.rt56.144.el6rt - 3.10.0-514.rt56.221.el6rt
MRG Realtime: 2
:
External linkshttp://access.redhat.com/errata/RHSA-2017:1647
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.
3) Denial of service
EUVDB-ID: #VU6659
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-2017-7645
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to cause DoS condition on the target system.
The weakness exists due to a flaw in the NFSv2/NFSv3 server in the nfsd subsystem. A remote attacker can use a long RPC reply related to net/sunrpc/svc.c, fs/nfsd/nfs3xdr.c, and fs/nfsd/nfsxdr.c. and cause the system to crash.
Successful exploitation of the vulnerability results in denial of service.
Install updates from vendor's website.
kernel-rt (Red Hat package): 3.10.0-229.rt56.144.el6rt - 3.10.0-514.rt56.221.el6rt
MRG Realtime: 2
:
External linkshttp://access.redhat.com/errata/RHSA-2017:1647
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.
4) Security restrictions bypass
EUVDB-ID: #VU7238
Risk: Low
CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-7895
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to bypass security restrictions on the target system.
The weakness exists due to boundary error when handling a user-supplied input. A remote attacker can send a specially crafted request, trigger pointer-arithmetic errors or possibly have unspecified other impact related to fs/nfsd/nfs3xdr.c and fs/nfsd/nfsxdr.c.
Successful exploitation of the vulnerability results in access to the system.
Install updates from vendor's website.
kernel-rt (Red Hat package): 3.10.0-229.rt56.144.el6rt - 3.10.0-514.rt56.221.el6rt
MRG Realtime: 2
:
External linkshttp://access.redhat.com/errata/RHSA-2017:1647
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.
