Huawei EulerOS: Security Advisory for kernel (EulerOS-SA-2019-2068)

Published: 2020-01-23 12:33:03
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:L/AC:L/Au:N/C:C/I:C/A:C

Summary:
The remote host is missing an update for the Huawei EulerOS 'kernel' Linux Distribution Package(s) announced via the EulerOS-SA-2019-2068 advisory.

Detection Method:
Checks if a vulnerable Linux Distribution Package version is present on the target host.

Technical Details:
An issue was discovered in the Linux kernel before 4.18.7. In block/blk-core.c, there is an __blk_drain_queue() use-after-free because a certain error case is mishandled.(CVE-2018-20856) In the Linux kernel before 5.1.7, a device can be tracked by an attacker using the IP ID values the kernel produces for connection-less protocols (e.g., UDP and ICMP). When such traffic is sent to multiple destination IP addresses, it is possible to obtain hash collisions (of indices to the counter array) and thereby obtain the hashing key (via enumeration). An attack may be conducted by hosting a crafted web page that uses WebRTC or gQUIC to force UDP traffic to attacker-controlled IP addresses.(CVE-2019-10638) The Linux kernel 4.x (starting from 4.1) and 5.x before 5.0.8 allows Information Exposure (partial kernel address disclosure), leading to a KASLR bypass. Specifically, it is possible to extract the KASLR kernel image offset using the IP ID values the kernel produces for connection-less protocols (e.g., UDP and ICMP). When such traffic is sent to multiple destination IP addresses, it is possible to obtain hash collisions (of indices to the counter array) and thereby obtain the hashing key (via enumeration). This key contains enough bits from a kernel address (of a static variable) so when the key is extracted (via enumeration), the offset of the kernel image is exposed. This attack can be carried out remotely, by the attacker forcing the target device to send UDP or ICMP (or certain other) traffic to attacker-controlled IP addresses. Forcing a server to send UDP traffic is trivial if the server is a DNS server. ICMP traffic is trivial if the server answers ICMP Echo requests (ping). For client targets, if the target visits the attacker's web page, then WebRTC or gQUIC can be used to force UDP traffic to attacker-controlled IP addresses.(CVE-2019-10639) The Linux kernel was found vulnerable to an integer overflow in the drivers/video/fbdev/uvesafb.c:uvesafb_setcmap() function. The vulnerability could result in local attackers being able to crash the kernel or potentially elevate privileges.(CVE-2018-13406) The SCTP socket buffer used by a userspace application is not accounted by the cgroups subsystem. An attacker can use this flaw to cause a denial of service attack.(CVE-2019-3874) The Linux kernel before 5.1-rc5 allows page-_refcount reference count overflow, with resultant use-after-free issues, if about 140 GiB of RAM exists. This is related to fs/fuse/dev.c, fs/pipe.c, fs/splice.c, include/linux/mm.h, include/linux/pipe_fs_i.h, kernel/trace/trace.c, mm/gup.c, and mm/hugetlb.c. It can occur w ... Description truncated. Please see the references for more information.

Affected Versions:
'kernel' Linux Distribution Package(s) on Huawei EulerOS V2.0SP3.

Recommendations:
Please install the updated Linux Distribution Package(s).

Solution Type:
Vendor Patch

Detection Type:
Linux Distribution Package

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2018-1093
https://nvd.nist.gov/vuln/detail/CVE-2018-13406
https://nvd.nist.gov/vuln/detail/CVE-2018-20856
https://nvd.nist.gov/vuln/detail/CVE-2019-10638
https://nvd.nist.gov/vuln/detail/CVE-2019-10639
https://nvd.nist.gov/vuln/detail/CVE-2019-11487
https://nvd.nist.gov/vuln/detail/CVE-2019-11833
https://nvd.nist.gov/vuln/detail/CVE-2019-11884
https://nvd.nist.gov/vuln/detail/CVE-2019-3874

References:

https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2019-2068

Severity
High
CVSS Score
7.2
Published
2020-01-23
Modified
2020-01-23
Category
Huawei EulerOS Local Security Checks

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