一、漏洞信息
漏洞编号:CVE-2022-23041
漏洞归属组件:kernel
漏洞归属的版本:4.19.194
CVSS V3.0分值:
BaseScore:7.0 High
Vector:CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
漏洞简述:
Linux PV device frontends vulnerable to attacks by backends T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Several Linux PV device frontends are using the grant table interfaces for removing access rights of the backends in ways being subject to race conditions, resulting in potential data leaks, data corruption by malicious backends, and denial of service triggered by malicious backends: blkfront, netfront, scsifront and the gntalloc driver are testing whether a grant reference is still in use. If this is not the case, they assume that a following removal of the granted access will always succeed, which is not true in case the backend has mapped the granted page between those two operations. As a result the backend can keep access to the memory page of the guest no matter how the page will be used after the frontend I/O has finished. The xenbus driver has a similar problem, as it doesn t check the success of removing the granted access of a shared ring buffer. blkfront: CVE-2022-23036 netfront: CVE-2022-23037 scsifront: CVE-2022-23038 gntalloc: CVE-2022-23039 xenbus: CVE-2022-23040 blkfront, netfront, scsifront, usbfront, dmabuf, xenbus, 9p, kbdfront, and pvcalls are using a functionality to delay freeing a grant reference until it is no longer in use, but the freeing of the related data page is not synchronized with dropping the granted access. As a result the backend can keep access to the memory page even after it has been freed and then re-used for a different purpose. CVE-2022-23041 netfront will fail a BUG_ON() assertion if it fails to revoke access in the rx path. This will result in a Denial of Service (DoS) situation of the guest which can be triggered by the backend. CVE-2022-23042
漏洞公开时间:2022-03-11 04:15
漏洞创建时间:2022-04-02 10:54:05
漏洞详情参考链接:
https://nvd.nist.gov/vuln/detail/CVE-2022-23041
漏洞分析指导链接:
https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md
漏洞数据来源:
其它
漏洞补丁信息:
二、漏洞分析结构反馈
影响性分析说明:
Linux PV device frontends vulnerable to attacks by backends T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Several Linux PV device frontends are using the grant table interfaces for removing access rights of the backends in ways being subject to race conditions, resulting in potential data leaks, data corruption by malicious backends, and denial of service triggered by malicious backends: blkfront, netfront, scsifront and the gntalloc driver are testing whether a grant reference is still in use. If this is not the case, they assume that a following removal of the granted access will always succeed, which is not true in case the backend has mapped the granted page between those two operations. As a result the backend can keep access to the memory page of the guest no matter how the page will be used after the frontend I/O has finished. The xenbus driver has a similar problem, as it doesn t check the success of removing the granted access of a shared ring buffer. blkfront: CVE-2022-23036 netfront: CVE-2022-23037 scsifront: CVE-2022-23038 gntalloc: CVE-2022-23039 xenbus: CVE-2022-23040 blkfront, netfront, scsifront, usbfront, dmabuf, xenbus, 9p, kbdfront, and pvcalls are using a functionality to delay freeing a grant reference until it is no longer in use, but the freeing of the related data page is not synchronized with dropping the granted access. As a result the backend can keep access to the memory page even after it has been freed and then re-used for a different purpose. CVE-2022-23041 netfront will fail a BUG_ON() assertion if it fails to revoke access in the rx path. This will result in a Denial of Service (DoS) situation of the guest which can be triggered by the backend. CVE-2022-23042
openEuler评分:
7.0
Vector:CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
受影响版本排查(受影响/不受影响):
1.openEuler-22.03-LTS:受影响
2.openEuler-20.03-LTS-SP1(4.19.90):受影响
3.openEuler-20.03-LTS-SP2(4.19.90):受影响
4.openEuler-20.03-LTS-SP3(4.19.90):受影响
修复是否涉及abi变化(是/否):
1.openEuler-22.03-LTS:否
2.openEuler-20.03-LTS-SP1(4.19.90):否
3.openEuler-20.03-LTS-SP2(4.19.90):否
4.openEuler-20.03-LTS-SP3(4.19.90):否
三、漏洞修复
安全公告链接:https://www.openeuler.org/zh/security/safety-bulletin/detail/?id=openEuler-SA-2022-1621
Hi ryuo, welcome to the openEuler Community.
I'm the Bot here serving you. You can find the instructions on how to interact with me at Here.
If you have any questions, please contact the SIG: Kernel, and any of the maintainers: @Xie XiuQi , @YangYingliang , @成坚 (CHENG Jian) , @pi3orama , @jiaoff
此处可能存在不合适展示的内容,页面不予展示。您可通过相关编辑功能自查并修改。
如您确认内容无涉及 不当用语 / 纯广告导流 / 暴力 / 低俗色情 / 侵权 / 盗版 / 虚假 / 无价值内容或违法国家有关法律法规的内容,可点击提交进行申诉,我们将尽快为您处理。
@Xie XiuQi ,@YangYingliang ,@成坚 (CHENG Jian) ,@pi3orama ,@jiaoff
issue处理注意事项:
1. 当前issue受影响的分支提交pr时, 须在pr描述中填写当前issue编号进行关联, 否则无法关闭当前issue;
2. 模板内容需要填写完整, 无论是受影响或者不受影响都需要填写完整内容,未引入的分支不需要填写, 否则无法关闭当前issue;
3. 以下为模板中需要填写完整的内容, 请复制到评论区回复, 注: 内容的标题名称(影响性分析说明, openEuler评分, 受影响版本排查(受影响/不受影响), 修复是否涉及abi变化(是/否))不能省略,省略后cve-manager将无法正常解析填写内容.
影响性分析说明:
openEuler评分: (评分和向量)
受影响版本排查(受影响/不受影响):
1.openEuler-20.03-LTS-SP1(4.19.90):
2.openEuler-20.03-LTS-SP2(4.19.90):
3.openEuler-20.03-LTS-SP3(4.19.194):
修复是否涉及abi变化(是/否):
1.openEuler-20.03-LTS-SP1(4.19.90):
2.openEuler-20.03-LTS-SP2(4.19.90):
3.openEuler-20.03-LTS-SP3(4.19.194):
issue处理具体操作请参考:
https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md
pr关联issue具体操作请参考:
https://gitee.com/help/articles/4142
@wangxiaoya CVE信息从NVD同步成功, 稍后请重新加载页面.
@zhengzengkai 请确认分支: openEuler-20.03-LTS-SP1,openEuler-20.03-LTS-SP2,openEuler-20.03-LTS-SP3,openEuler-22.03-LTS 受影响/不受影响.
请确认分支信息是否填写完整,否则将无法关闭当前issue.
CVE-2022-23041
I50WAF
影响性分析说明:
Linux PV device frontends vulnerable to attacks by backends T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Several Linux PV device frontends are using the grant table interfaces for removing access rights of the backends in ways being subject to race conditions, resulting in potential data leaks, data corruption by malicious backends, and denial of service triggered by malicious backends: blkfront, netfront, scsifront and the gntalloc driver are testing whether a grant reference is still in use. If this is not the case, they assume that a following removal of the granted access will always succeed, which is not true in case the backend has mapped the granted page between those two operations. As a result the backend can keep access to the memory page of the guest no matter how the page will be used after the frontend I/O has finished. The xenbus driver has a similar problem, as it doesn t check the success of removing the granted access of a shared ring buffer. blkfront: CVE-2022-23036 netfront: CVE-2022-23037 scsifront: CVE-2022-23038 gntalloc: CVE-2022-23039 xenbus: CVE-2022-23040 blkfront, netfront, scsifront, usbfront, dmabuf, xenbus, 9p, kbdfront, and pvcalls are using a functionality to delay freeing a grant reference until it is no longer in use, but the freeing of the related data page is not synchronized with dropping the granted access. As a result the backend can keep access to the memory page even after it has been freed and then re-used for a different purpose. CVE-2022-23041 netfront will fail a BUG_ON() assertion if it fails to revoke access in the rx path. This will result in a Denial of Service (DoS) situation of the guest which can be triggered by the backend. CVE-2022-23042
openEuler评分:(评分和向量)
7
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CVE状态:待分析(kernel4.19)
受影响版本排查(受影响/不受影响):
1.openEuler-22.03-LTS(5.10.0):受影响
2.openEuler-20.03-LTS-SP1(4.19.90):受影响
3.openEuler-20.03-LTS-SP2(4.19.90):受影响
4.openEuler-20.03-LTS-SP3(4.19.194):受影响
修复是否涉及abi变化(是/否):
1.openEuler-22.03-LTS(5.10.0):否
2.openEuler-20.03-LTS-SP1(4.19.90):否
3.openEuler-20.03-LTS-SP2(4.19.90):否
4.openEuler-20.03-LTS-SP3(4.19.194):否
@成坚 (CHENG Jian) 经过 cve-manager 解析, 已分析的内容如下表所示:
状态 | 需分析 | 内容 |
---|---|---|
已分析 | 1.影响性分析说明 | Linux PV device frontends vulnerable to attacks by backends T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Several Linux PV device frontends are using the grant table interfaces for removing access rights of the backends in ways being subject to race conditions, resulting in potential data leaks, data corruption by malicious backends, and denial of service triggered by malicious backends: blkfront, netfront, scsifront and the gntalloc driver are testing whether a grant reference is still in use. If this is not the case, they assume that a following removal of the granted access will always succeed, which is not true in case the backend has mapped the granted page between those two operations. As a result the backend can keep access to the memory page of the guest no matter how the page will be used after the frontend I/O has finished. The xenbus driver has a similar problem, as it doesn t check the success of removing the granted access of a shared ring buffer. blkfront: CVE-2022-23036 netfront: CVE-2022-23037 scsifront: CVE-2022-23038 gntalloc: CVE-2022-23039 xenbus: CVE-2022-23040 blkfront, netfront, scsifront, usbfront, dmabuf, xenbus, 9p, kbdfront, and pvcalls are using a functionality to delay freeing a grant reference until it is no longer in use, but the freeing of the related data page is not synchronized with dropping the granted access. As a result the backend can keep access to the memory page even after it has been freed and then re-used for a different purpose. CVE-2022-23041 netfront will fail a BUG_ON() assertion if it fails to revoke access in the rx path. This will result in a Denial of Service (DoS) situation of the guest which can be triggered by the backend. CVE-2022-23042 |
已分析 | 2.openEulerScore | 7 |
已分析 | 2.openEulerVector | AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
已分析 | 3.受影响版本排查 | openEuler-22.03-LTS:受影响,openEuler-20.03-LTS-SP1:受影响,openEuler-20.03-LTS-SP2:受影响,openEuler-20.03-LTS-SP3:受影响 |
已分析 | 4.修复是否涉及abi变化 | openEuler-22.03-LTS:否,openEuler-20.03-LTS-SP1:否,openEuler-20.03-LTS-SP2:否,openEuler-20.03-LTS-SP3:否 |
请确认分析内容的准确性, 确认无误后, 您可以进行后续步骤, 否则您可以继续分析.
@成坚 (CHENG Jian) ,@Xie XiuQi ,@YangYingliang ,@pi3orama ,@jiaoff ,@zhengzengkai
关闭issue前,需要将受影响的分支在合并pr时关联上当前issue编号: #I50WAF:CVE-2022-23041
受影响分支: openEuler-20.03-LTS-SP1/openEuler-20.03-LTS-SP2/openEuler-20.03-LTS-SP3
具体操作参考: https://gitee.com/help/articles/4142
登录 后才可以发表评论