cnvd - cnvd-2018-24547

cnvd-2018-24547

Vulnerability from cnvd

Title: Linux kernel拒绝服务漏洞（CNVD-2018-24547）

Description:

Linux kernel是开源操作系统Linux所使用的内核。crypto subsystem是其中的一个加密子系统。

Linux kerne 4.15-rc4之前版本，crypto子系统存在安全漏洞。各af_alg_ctx被释放时，而非aead_tfm被释放，会删除null skcipher"，造成使用中的空skcipher被释放，本地攻击者可利用该漏洞造成系统崩溃并可能提升权限。"

Severity: 高

Patch Name: Linux kernel拒绝服务漏洞（CNVD-2018-24547）的补丁

Patch Description:

Linux kernel是开源操作系统Linux所使用的内核。crypto subsystem是其中的一个加密子系统。

Linux kerne 4.15-rc4之前版本，crypto子系统存在安全漏洞。各af_alg_ctx被释放时，而非aead_tfm被释放，会删除null skcipher"，造成使用中的空skcipher被释放，本地攻击者可利用该漏洞造成系统崩溃并可能提升权限。"目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description:

目前厂商已经发布了升级补丁以修复这个安全问题，请到厂商的主页下载： https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14619 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b32a7dc8aef1882fbf983eb354837488cc9d54dc

Reference: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-14619 https://www.securityfocus.com/bid/105200

Impacted products

Name
Linux Kernel < 4.15-rc4

Show details on source website

JSON

To clipboard

{
  "bids": {
    "bid": {
      "bidNumber": "105200"
    }
  },
  "cves": {
    "cve": {
      "cveNumber": "CVE-2018-14619"
    }
  },
  "description": "Linux kernel\u662f\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002crypto subsystem\u662f\u5176\u4e2d\u7684\u4e00\u4e2a\u52a0\u5bc6\u5b50\u7cfb\u7edf\u3002\n\nLinux kerne 4.15-rc4\u4e4b\u524d\u7248\u672c\uff0ccrypto\u5b50\u7cfb\u7edf\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\u3002\u5404af_alg_ctx\u88ab\u91ca\u653e\u65f6\uff0c\u800c\u975eaead_tfm\u88ab\u91ca\u653e\uff0c\u4f1a\u5220\u9664null skcipher\"\uff0c\u9020\u6210\u4f7f\u7528\u4e2d\u7684\u7a7askcipher\u88ab\u91ca\u653e\uff0c\u672c\u5730\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u7cfb\u7edf\u5d29\u6e83\u5e76\u53ef\u80fd\u63d0\u5347\u6743\u9650\u3002\"",
  "discovererName": "Florian Weimer and Ondrej Mosnacek",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u7ecf\u53d1\u5e03\u4e86\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u8fd9\u4e2a\u5b89\u5168\u95ee\u9898\uff0c\u8bf7\u5230\u5382\u5546\u7684\u4e3b\u9875\u4e0b\u8f7d\uff1a\r\nhttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14619\r\nhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b32a7dc8aef1882fbf983eb354837488cc9d54dc",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2018-24547",
  "openTime": "2018-12-04",
  "patchDescription": "Linux kernel\u662f\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002crypto subsystem\u662f\u5176\u4e2d\u7684\u4e00\u4e2a\u52a0\u5bc6\u5b50\u7cfb\u7edf\u3002\r\n\r\nLinux kerne 4.15-rc4\u4e4b\u524d\u7248\u672c\uff0ccrypto\u5b50\u7cfb\u7edf\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\u3002\u5404af_alg_ctx\u88ab\u91ca\u653e\u65f6\uff0c\u800c\u975eaead_tfm\u88ab\u91ca\u653e\uff0c\u4f1a\u5220\u9664null skcipher\"\uff0c\u9020\u6210\u4f7f\u7528\u4e2d\u7684\u7a7askcipher\u88ab\u91ca\u653e\uff0c\u672c\u5730\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u7cfb\u7edf\u5d29\u6e83\u5e76\u53ef\u80fd\u63d0\u5347\u6743\u9650\u3002\"\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "Linux kernel\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\uff08CNVD-2018-24547\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Linux Kernel \u003c 4.15-rc4"
  },
  "referenceLink": "http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-14619\r\nhttps://www.securityfocus.com/bid/105200",
  "serverity": "\u9ad8",
  "submitTime": "2018-09-03",
  "title": "Linux kernel\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\uff08CNVD-2018-24547\uff09"
}

CVE-2018-14619 (GCVE-0-2018-14619)

Vulnerability from cvelistv5

Published

2018-08-30 12:00

Modified

2024-08-05 09:29

Severity ?

6.2 (Medium) - CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-416

Summary

A flaw was found in the crypto subsystem of the Linux kernel before version kernel-4.15-rc4. The "null skcipher" was being dropped when each af_alg_ctx was freed instead of when the aead_tfm was freed. This can cause the null skcipher to be freed while it is still in use leading to a local user being able to crash the system or possibly escalate privileges.

References

▼	URL	Tags
	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b32a7dc8aef1882fbf983eb354837488cc9d54dc	x_refsource_CONFIRM
	https://access.redhat.com/errata/RHSA-2018:2948	vendor-advisory, x_refsource_REDHAT
	https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0013	x_refsource_CONFIRM
	https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14619	x_refsource_CONFIRM
	http://www.securityfocus.com/bid/105200	vdb-entry, x_refsource_BID

Impacted products

	Vendor	Product	Version
	[UNKNOWN]	kernel	Version: kernel-4.15-rc4

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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