Linux Netfilter本地权限提升漏洞

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2023-12-01 13:48:49 Ali_nvd 来源：ZONE.CI 全球网 0 阅读模式

高危 Linux Netfilter本地权限提升漏洞

CVE编号

CVE-2021-22555

利用情况

POC 已公开

补丁情况

临时补丁

披露时间

2021-07-07

漏洞描述

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在缓冲区错误漏洞，该漏洞源于net/netfilter/x_tables.c 中的堆越界写入。该漏洞允许攻击者通过用户名空间获得权限或引起 DoS。

解决建议

1、根据影响及其安全版本排查并升级到安全版本。若您的ECS实例操作系统为Alibaba Cloud Linux 2，具体修复方案请参见《Alibaba Cloud Linux 2系统的CVE-2021-22555安全漏洞内核热补丁修复方案》2、若暂无法升级，可通过禁用非特权用户执行CLONE_NEWUSER、CLONE_NEWNET以进行缓解。echo 0 > /proc/sys/user/max_user_namespaces

参考链接
http://packetstormsecurity.com/files/163528/Linux-Kernel-Netfilter-Heap-Out-O...
http://packetstormsecurity.com/files/163878/Kernel-Live-Patch-Security-Notice...
http://packetstormsecurity.com/files/164155/Kernel-Live-Patch-Security-Notice...
http://packetstormsecurity.com/files/164437/Netfilter-x_tables-Heap-Out-Of-Bo...
http://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice...
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net...
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net...
https://github.com/google/security-research/security/advisories/GHSA-xxx5-8mvq-3528
https://security.netapp.com/advisory/ntap-20210805-0010/

受影响软件情况

1
#	类型	厂商	产品	版本	影响面
	运行在以下环境
	系统	alibaba_cloud_linux_2.1903	kernel	*		Up to (excluding) 1.0-20210719170939.al7
	运行在以下环境
	系统	amazon_2	kernel	*		Up to (excluding) 4.14.231-173.360.amzn2
	运行在以下环境
	系统	anolis_os_7	kernel	*		Up to (excluding) 4.19
	运行在以下环境
	系统	anolis_os_8	kernel	*		Up to (excluding) 4.18
	运行在以下环境
	系统	centos_7	kpatch-patch	*		Up to (excluding) 3.10.0-1160.41.1.el7
	运行在以下环境
	系统	centos_8	kpatch-patch	*		Up to (excluding) 4.18.0-305.12.1.el8_4
	运行在以下环境
	系统	debian_10	linux	*		Up to (excluding) 4.19.194-1
	运行在以下环境
	系统	debian_11	linux	*		Up to (excluding) 5.10.38-1
	运行在以下环境
	系统	debian_12	linux	*		Up to (excluding) 5.10.38-1
	运行在以下环境
	系统	debian_9	linux	*		Up to (excluding) 4.9.272-1
	运行在以下环境
	系统	debian_sid	linux	*		Up to (excluding) 5.10.38-1
	运行在以下环境
	系统	kylinos_aarch64_V10SP2	kernel	*		Up to (excluding) 4.19.90-25.11.v2101.ky10
	运行在以下环境
	系统	kylinos_x86_64_V10SP2	kernel	*		Up to (excluding) 4.19.90-25.11.v2101.ky10
	运行在以下环境
	系统	linux	linux_kernel	*	From (including) 2.6.19	Up to (excluding) 4.4.267
	运行在以下环境
	系统	linux	linux_kernel	*	From (including) 4.10	Up to (excluding) 4.14.231
	运行在以下环境
	系统	linux	linux_kernel	*	From (including) 4.15	Up to (excluding) 4.19.188
	运行在以下环境
	系统	linux	linux_kernel	*	From (including) 4.20	Up to (excluding) 5.4.113
	运行在以下环境
	系统	linux	linux_kernel	*	From (including) 4.5	Up to (excluding) 4.9.267
	运行在以下环境
	系统	linux	linux_kernel	*	From (including) 5.11	Up to (excluding) 5.12
	运行在以下环境
	系统	linux	linux_kernel	*	From (including) 5.5	Up to (excluding) 5.10.31
	运行在以下环境
	系统	opensuse_Leap_15.2	kernel	*		Up to (excluding) 5.3.18-lp152.84.1
	运行在以下环境
	系统	opensuse_Leap_15.3	kernel	*		Up to (excluding) 5.3.18-59.16.1
	运行在以下环境
	系统	oracle_6	kernel	*		Up to (excluding) 4.1.12-124.53.5.el7uek
	运行在以下环境
	系统	oracle_7	kernel	*		Up to (excluding) 3.10.0-1160.41.1.el7
	运行在以下环境
	系统	oracle_8	kernel	*		Up to (excluding) 4.18.0-305.12.1.el8_4
	运行在以下环境
	系统	redhat_7	kernel-rt	*		Up to (excluding) 3.10.0-1160.41.1.el7
	运行在以下环境
	系统	redhat_8	kpatch-patch	*		Up to (excluding) 4.18.0-305.12.1.el8_4
	运行在以下环境
	系统	suse_12_SP5	kernel	*		Up to (excluding) 4.12.14-122.80.1
	运行在以下环境
	系统	ubuntu_14.04.6_lts	linux	*		Up to (excluding) 3.13.0-187.238
	运行在以下环境
	系统	ubuntu_18.04	linux-hwe-5.4	*		Up to (excluding) 4.15.0-1115.128
	运行在以下环境
	系统	ubuntu_18.04.5_lts	linux	*		Up to (excluding) 4.15.0-144.148
	运行在以下环境
系统	ubuntu_20.04	linux-bluefield	*		Up to (excluding) 5.4.0-1048.50
运行在以下环境
系统	ubuntu_21.04	linux	*		Up to (excluding) 5.11.0-1009.10