Red Hat Enterprise Linux 7 update for kernel-rt
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2019-1125 CVE-2019-9500 |
| CWE-ID | CWE-200 CWE-122 |
| Exploitation vector | Local network |
| Public exploit | Public exploit code for vulnerability #1 is available. |
| Vulnerable software Subscribe |
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 kernel-rt (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) Information disclosure
EUVDB-ID: #VU19946
Risk: Low
CVSSv3.1: 7.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]
CVE-ID: CVE-2019-1125
CWE-ID:
CWE-200 - Information exposure
Exploit availability: Yes
DescriptionThe vulnerability allows a local user to gain access to potentially sensitive information and elevate privileges on the system.
The vulnerability exists when certain central processing units (CPU) speculatively access memory. A local user can gain unauthorized access to sensitive information and elevate privileges on the system.
This issue is a variant of the Spectre Variant 1 speculative execution side channel vulnerability that leverages SWAPGS instructions to bypass KPTI/KVA mitigations.
MitigationInstall updates from vendor's website.
Red Hat Enterprise Linux for Real Time: 7
Red Hat Enterprise Linux for Real Time for NFV: 7
kernel-rt (Red Hat package): before 3.10.0-1062.1.1.rt56.1024.el7
External linkshttp://access.redhat.com/errata/RHSA-2019:2609
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.
2) Heap-based buffer overflow
EUVDB-ID: #VU23563
Risk: Low
CVSSv3.1: 4.6 [CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2019-9500
CWE-ID:
CWE-122 - Heap-based Buffer Overflow
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error in the "brcmf_wowl_nd_results()" function in "drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c" file. A remote attacker on the local network can trigger heap-based buffer overflow and cause a denial of service condition on the target system.
Install updates from vendor's website.
Red Hat Enterprise Linux for Real Time: 7
Red Hat Enterprise Linux for Real Time for NFV: 7
kernel-rt (Red Hat package): before 3.10.0-1062.1.1.rt56.1024.el7
External linkshttp://access.redhat.com/errata/RHSA-2019:2609
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
