Red Hat update for kernel-rt
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 9 |
| CVE-ID | CVE-2016-8399 CVE-2017-1000111 CVE-2017-1000112 CVE-2017-11176 CVE-2017-14106 CVE-2017-7184 CVE-2017-7541 CVE-2017-7542 CVE-2017-7558 |
| CWE-ID | CWE-121 CWE-362 CWE-119 CWE-476 CWE-369 CWE-122 CWE-835 CWE-190 CWE-125 |
| Exploitation vector | Network |
| Public exploit |
Public exploit code for vulnerability #3 is available. Public exploit code for vulnerability #4 is available. Public exploit code for vulnerability #9 is available. |
| Vulnerable software Subscribe |
kernel-rt (Red Hat package) Operating systems & Components / Operating system package or component Red Hat Enterprise Linux for Real Time Operating systems & Components / Operating system Red Hat Enterprise Linux for Real Time for NFV Operating systems & Components / Operating system |
| Vendor |
Red Hat Inc. |
Security Bulletin
This security bulletin contains information about 9 vulnerabilities.
1) Stack-based buffer overflow
EUVDB-ID: #VU1255
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-2016-8399
CWE-ID:
CWE-121 - Stack-based buffer overflow
Exploit availability: No
DescriptionThe vulnerability allows a local user to cause kernel panic or escalate privileges.
The vulnerability exists due to a boundary error when crating an ICMP header. A local user can create a very short ICMP header and execute arbitrary code within the contest of the kernel.
Successful exploitation of the vulnerability may allow a local user to escalate privileges on the system.
MitigationInstall updates from vendor's website.
kernel-rt (Red Hat package): 3.10.0-229.1.2.rt56.141.2.el7_1 - 3.10.0-693.2.2.rt56.623.el7
Red Hat Enterprise Linux for Real Time: 7
Red Hat Enterprise Linux for Real Time for NFV: 7
:
External linkshttp://access.redhat.com/errata/RHSA-2017:2931
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) Privilege escalation
EUVDB-ID: #VU7865
Risk: Low
CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-1000111
Exploit availability: No
DescriptionThe vulnerability allows a local attacker to gain elevated privileges on the target system.
The weakness exists in the packet_set_ring function due to improper implementation of raw packet sockets in the networking subsystem of the affected software that handles synchronization. A local attacker with CAP_NET_RAW permissions can open a raw packet socket, trigger a race condition, eventually cause use-after-free error and execute arbitrary code with root privileges.
Successful exploitation of the vulnerability may result in system compromise.
Install updates from vendor's website.
kernel-rt (Red Hat package): 3.10.0-229.1.2.rt56.141.2.el7_1 - 3.10.0-693.2.2.rt56.623.el7
Red Hat Enterprise Linux for Real Time: 7
Red Hat Enterprise Linux for Real Time for NFV: 7
:
External linkshttp://access.redhat.com/errata/RHSA-2017:2931
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.
3) Privilege escalation
EUVDB-ID: #VU7954
Risk: Low
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-2017-1000112
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: Yes
DescriptionThe vulnerability allows a local attacker to gain elevated privileges on the target system.
The weakness exists due to race condition in the UDP Fragmentation Offload (UFO) code. A local attacker can send specially crafted UFO packets, trigger memory corruption and execute arbitrary code with elevated privileges.
Successful exploitation of the vulnerability may result in system compromise.
Install updates from vendor's website.
kernel-rt (Red Hat package): 3.10.0-229.1.2.rt56.141.2.el7_1 - 3.10.0-693.2.2.rt56.623.el7
Red Hat Enterprise Linux for Real Time: 7
Red Hat Enterprise Linux for Real Time for NFV: 7
:
External linkshttp://access.redhat.com/errata/RHSA-2017:2931
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.
4) NULL pointer dereference
EUVDB-ID: #VU16551
Risk: Low
CVSSv3.1: 6.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C]
CVE-ID: CVE-2017-11176
CWE-ID:
CWE-476 - NULL Pointer Dereference
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to cause DoS condition.
The vulnerability exists due to the mq_notify function does not set the sock pointer to NULL upon entry into the retry logic. A remote attacker can trigger use-after-free error during a user-space close of a Netlink socket and cause the service to crash.
MitigationInstall updates from vendor's website.
kernel-rt (Red Hat package): 3.10.0-229.1.2.rt56.141.2.el7_1 - 3.10.0-693.2.2.rt56.623.el7
Red Hat Enterprise Linux for Real Time: 7
Red Hat Enterprise Linux for Real Time for NFV: 7
:
External linkshttp://access.redhat.com/errata/RHSA-2017:2931
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. However, proof of concept for this vulnerability is available.
5) 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 updates from vendor's website.
kernel-rt (Red Hat package): 3.10.0-229.1.2.rt56.141.2.el7_1 - 3.10.0-693.2.2.rt56.623.el7
Red Hat Enterprise Linux for Real Time: 7
Red Hat Enterprise Linux for Real Time for NFV: 7
:
External linkshttp://access.redhat.com/errata/RHSA-2017:2931
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.
6) Buffer overflow
EUVDB-ID: #VU6184
Risk: Low
CVSSv3.1: 8.1 [CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-7184
CWE-ID:
CWE-122 - Heap-based Buffer Overflow
Exploit availability: No
DescriptionThe vulnerability allows a local attacker to execute arbitrary code on the target system with escalated privileges.
The vulnerability exists due to boundary error in xfrm_replay_verify_len() function in net/xfrm/xfrm_user.c in Linux kernel when validating data after an XFRM_MSG_NEWAE update. A local use can trigger heap-based buffer overflow by leveraging the CAP_NET_ADMIN capability and execute arbitrary code on the target system with root privileges.
Successful exploitation of this vulnerability may allow an attacker to compromise vulnerable system.
This vulnerability was demonstrated during the Pwn2Own competition at CanSecWest 2017 for the Ubuntu 16.10 linux-image-* package 4.8.0.41.52.
MitigationInstall updates from vendor's website.
kernel-rt (Red Hat package): 3.10.0-229.1.2.rt56.141.2.el7_1 - 3.10.0-693.2.2.rt56.623.el7
Red Hat Enterprise Linux for Real Time: 7
Red Hat Enterprise Linux for Real Time for NFV: 7
:
External linkshttp://access.redhat.com/errata/RHSA-2017:2931
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.
7) Buffer overflow
EUVDB-ID: #VU7585
Risk: Low
CVSSv3.1: 8.1 [CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-7541
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: No
DescriptionThe vulnerability allows a local attacker to execute arbitrary code on the target system with elevated privileges.
The vulnerability exists due to boundary error in brcmf_cfg80211_mgmt_tx() function in drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c in the Linux kernel before 4.12.3. A local user can create a specially crafted NL80211_CMD_FRAME Netlink packet and trigger DoS conditions or execute arbitrary code on the target system with elevated privileges.
Successful exploitation of this vulnerability may allow an attacker to obtain elevated privileges.
MitigationInstall updates from vendor's website.
kernel-rt (Red Hat package): 3.10.0-229.1.2.rt56.141.2.el7_1 - 3.10.0-693.2.2.rt56.623.el7
Red Hat Enterprise Linux for Real Time: 7
Red Hat Enterprise Linux for Real Time for NFV: 7
:
External linkshttp://access.redhat.com/errata/RHSA-2017:2931
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.
8) Denial of service
EUVDB-ID: #VU10722
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-2017-7542
CWE-ID:
CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Exploit availability: No
DescriptionThe vulnerability allows a local attacker to cause DoS condition on the target system.
The weakness exists in the ip6_find_1stfragopt function in net/ipv6/output_core.c due to leveraging the ability to open a raw socket. A local attacker can trigger integer overflow and infinite loop and cause a denial of service.
Install updates from vendor's website.
kernel-rt (Red Hat package): 3.10.0-229.1.2.rt56.141.2.el7_1 - 3.10.0-693.2.2.rt56.623.el7
Red Hat Enterprise Linux for Real Time: 7
Red Hat Enterprise Linux for Real Time for NFV: 7
:
External linkshttp://access.redhat.com/errata/RHSA-2017:2931
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.
9) Out-of-bounds read
EUVDB-ID: #VU8008
Risk: Low
CVSSv3.1: 5.2 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:P/RL:U/RC:C]
CVE-ID: CVE-2017-7558
CWE-ID:
CWE-125 - Out-of-bounds read
Exploit availability: Yes
DescriptionThe vulnerability allows a local attacker to obtain potentially sensitive information.
The weakness exists due to put-of-bounds read in the inet_diag_msg_sctpaddrs_fill(), inet_diag_msg_sctpladdrs_fill(), and sctp_get_sctp_info() functions in 'net/sctp/sctp_diag.c'. A local attacker can gain access to important data in portions of slab memory on the target system.
Install updates from vendor's website.
kernel-rt (Red Hat package): 3.10.0-229.1.2.rt56.141.2.el7_1 - 3.10.0-693.2.2.rt56.623.el7
Red Hat Enterprise Linux for Real Time: 7
Red Hat Enterprise Linux for Real Time for NFV: 7
:
External linkshttp://access.redhat.com/errata/RHSA-2017:2931
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.
