一、漏洞信息
漏洞编号:CVE-2024-26629
漏洞归属组件:kernel
漏洞归属的版本:4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0
CVSS V2.0分值:
BaseScore:0.0 Low
Vector:CVSS:2.0/
漏洞简述:
In the Linux kernel, the following vulnerability has been resolved:nfsd: fix RELEASE_LOCKOWNERThe test on so_count in nfsd4_release_lockowner() is nonsense andharmful. Revert to using check_for_locks(), changing that to not sleep.First: harmful.As is documented in the kdoc comment for nfsd4_release_lockowner(), thetest on so_count can transiently return a false positive resulting in areturn of NFS4ERR_LOCKS_HELD when in fact no locks are held. This isclearly a protocol violation and with the Linux NFS client it can causeincorrect behaviour.If RELEASE_LOCKOWNER is sent while some other thread is stillprocessing a LOCK request which failed because, at the time that requestwas received, the given owner held a conflicting lock, then the nfsdthread processing that LOCK request can hold a reference (conflock) tothe lock owner that causes nfsd4_release_lockowner() to return anincorrect error.The Linux NFS client ignores that NFS4ERR_LOCKS_HELD error because itnever sends NFS4_RELEASE_LOCKOWNER without first releasing any locks, soit knows that the error is impossible. It assumes the lock owner was infact released so it feels free to use the same lock owner identifier insome later locking request.When it does reuse a lock owner identifier for which a previous RELEASEfailed, it will naturally use a lock_seqid of zero. However the server,which didn t release the lock owner, will expect a larger lock_seqid andso will respond with NFS4ERR_BAD_SEQID.So clearly it is harmful to allow a false positive, which testingso_count allows.The test is nonsense because ... well... it doesn t mean anything.so_count is the sum of three different counts.1/ the set of states listed on so_stateids2/ the set of active vfs locks owned by any of those states3/ various transient counts such as for conflicting locks.When it is tested against 2 it is clear that one of these is thetransient reference obtained by find_lockowner_str_locked(). It is notclear what the other one is expected to be.In practice, the count is often 2 because there is precisely one stateon so_stateids. If there were more, this would fail.In my testing I see two circumstances when RELEASE_LOCKOWNER is called.In one case, CLOSE is called before RELEASE_LOCKOWNER. That results inall the lock states being removed, and so the lockowner being discarded(it is removed when there are no more references which usually happenswhen the lock state is discarded). When nfsd4_release_lockowner() findsthat the lock owner doesn t exist, it returns success.The other case shows an so_count of 2 and precisely one state listedin so_stateid. It appears that the Linux client uses a separate lockowner for each file resulting in one lock state per lock owner, so thistest on 2 is safe. For another client it might not be safe.So this patch changes check_for_locks() to use the (newish)find_any_file_locked() so that it doesn t take a reference on thenfs4_file and so never calls nfsd_file_put(), and so never sleeps. Withthis check is it safe to restore the use of check_for_locks() ratherthan testing so_count against the mysterious 2 .
漏洞公开时间:2024-03-13 22:15:07
漏洞创建时间:2024-03-13 22:46:52
漏洞详情参考链接:
https://nvd.nist.gov/vuln/detail/CVE-2024-26629
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:
openBrain开源漏洞感知系统
漏洞补丁信息:
影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |
---|---|---|---|---|
linux | https://git.kernel.org/linus/edcf9725150e42beeca42d085149f4c88fa97afd | https://git.kernel.org/linus/ce3c4ad7f4ce5db7b4f08a1e237d8dd94b39180b | ubuntu |
二、漏洞分析结构反馈
影响性分析说明:
Reserved.
openEuler评分:
4.0
Vector:CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:N
受影响版本排查(受影响/不受影响):
1.openEuler-20.03-LTS-SP1(4.19.90):不受影响
2.openEuler-20.03-LTS-SP4(4.19.90):不受影响
3.openEuler-22.03-LTS(5.10.0):不受影响
4.openEuler-22.03-LTS-SP1(5.10.0):不受影响
5.openEuler-22.03-LTS-SP2(5.10.0):不受影响
6.openEuler-22.03-LTS-SP3(5.10.0):不受影响
7.master(6.1.0):不受影响
8.openEuler-22.03-LTS-Next(5.10.0):不受影响
9.openEuler-24.03-LTS:不受影响
10.openEuler-24.03-LTS-Next:不受影响
修复是否涉及abi变化(是/否):
1.openEuler-20.03-LTS-SP1(4.19.90):否
2.openEuler-20.03-LTS-SP4(4.19.90):否
3.openEuler-22.03-LTS(5.10.0):否
4.openEuler-22.03-LTS-SP1(5.10.0):否
5.openEuler-22.03-LTS-SP2(5.10.0):否
6.openEuler-22.03-LTS-SP3(5.10.0):否
7.master(6.1.0):否
8.openEuler-22.03-LTS-Next(5.10.0):否
9.openEuler-24.03-LTS:否
10.openEuler-24.03-LTS-Next:否
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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.master(6.1.0):
2.openEuler-20.03-LTS-SP1(4.19.90):
3.openEuler-20.03-LTS-SP4(4.19.90):
4.openEuler-22.03-LTS(5.10.0):
5.openEuler-22.03-LTS-Next(5.10.0):
6.openEuler-22.03-LTS-SP1(5.10.0):
7.openEuler-22.03-LTS-SP2(5.10.0):
8.openEuler-22.03-LTS-SP3(5.10.0):
9.openEuler-24.03-LTS:
修复是否涉及abi变化(是/否):
1.master(6.1.0):
2.openEuler-20.03-LTS-SP1(4.19.90):
3.openEuler-20.03-LTS-SP4(4.19.90):
4.openEuler-22.03-LTS(5.10.0):
5.openEuler-22.03-LTS-Next(5.10.0):
6.openEuler-22.03-LTS-SP1(5.10.0):
7.openEuler-22.03-LTS-SP2(5.10.0):
8.openEuler-22.03-LTS-SP3(5.10.0):
9.openEuler-24.03-LTS:
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
参考网址 | 关联pr | 状态 | 补丁链接 |
---|---|---|---|
https://nvd.nist.gov/vuln/detail/CVE-2024-26629 | None | None |
https://git.kernel.org/stable/c/edcf9725150e42beeca42d085149f4c88fa97afd https://git.kernel.org/stable/c/8f5b860de87039b007e84a28a5eefc888154e098 https://git.kernel.org/stable/c/b7d2eee1f53899b53f069bba3a59a419fc3d331b https://git.kernel.org/stable/c/e4cf8941664cae2f89f0189c29fe2ce8c6be0d03 |
https://ubuntu.com/security/CVE-2024-26629 | None | None | https://discourse.ubuntu.com/c/ubuntu-pro |
https://www.opencve.io/cve/CVE-2024-26629 | None | None |
https://git.kernel.org/stable/c/edcf9725150e42beeca42d085149f4c88fa97afd https://git.kernel.org/stable/c/8f5b860de87039b007e84a28a5eefc888154e098 https://git.kernel.org/stable/c/b7d2eee1f53899b53f069bba3a59a419fc3d331b https://git.kernel.org/stable/c/e4cf8941664cae2f89f0189c29fe2ce8c6be0d03 |
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2024-26629 | |||
https://security-tracker.debian.org/tracker/CVE-2024-26629 |
说明:补丁链接仅供初步排查参考,实际可用性请人工再次确认,补丁下载验证可使用CVE补丁工具。
若补丁不准确,烦请在此issue下评论 '/report-patch 参考网址 补丁链接1,补丁链接2' 反馈正确信息,便于我们不断优化工具,不胜感激。
如 /report-patch https://security-tracker.debian.org/tracker/CVE-2021-3997 https://github.com/systemd/systemd/commit/5b1cf7a9be37e20133c0208005274ce4a5b5c6a1
@郭梦琪 请确认分支: master,openEuler-20.03-LTS-SP1,openEuler-20.03-LTS-SP4,openEuler-22.03-LTS,openEuler-22.03-LTS-Next,openEuler-22.03-LTS-SP1,openEuler-22.03-LTS-SP2,openEuler-22.03-LTS-SP3,openEuler-24.03-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.
@郭梦琪 4.受影响版本排查(受影响/不受影响)=> 没有分析或未按正确格式填写:master:,openEuler-20.03-LTS-SP1:,openEuler-20.03-LTS-SP4:,openEuler-22.03-LTS:,openEuler-22.03-LTS-Next:,openEuler-22.03-LTS-SP1:,openEuler-22.03-LTS-SP2:,openEuler-22.03-LTS-SP3:,openEuler-24.03-LTS:
CVE-2024-26629
影响性分析说明:
Reserved.
openEuler评分:(评分和向量)
0.0
CVSS: 3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:N
受影响版本排查(受影响/不受影响):
1.openEuler-20.03-LTS-SP1:不受影响
2.openEuler-20.03-LTS-SP4:不受影响
3.openEuler-22.03-LTS:不受影响
4.openEuler-22.03-LTS-SP1:不受影响
5.openEuler-22.03-LTS-SP2:不受影响
6.openEuler-22.03-LTS-SP3:不受影响
7.master(6.1.0):不受影响
8.openEuler-22.03-LTS-Next:不受影响
9.openEuler-24.03-LTS:不受影响
10.openEuler-24.03-LTS-Next:不受影响
修复是否涉及abi变化(是/否):
1.openEuler-20.03-LTS-SP1(4.19.90):否
2.openEuler-20.03-LTS-SP4:否
3.openEuler-22.03-LTS:否
4.openEuler-22.03-LTS-SP1:否
5.openEuler-22.03-LTS-SP2:否
6.openEuler-22.03-LTS-SP3:否
7.master(6.1.0):否
8.openEuler-22.03-LTS-Next:否
9.openEuler-24.03-LTS:否
10.openEuler-24.03-LTS-Next:否
===========================================================
@sanglipeng 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 | Reserved. |
已分析 | 2.openEulerScore | 4 |
已分析 | 3.openEulerVector | AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:N |
已分析 | 4.受影响版本排查 | openEuler-20.03-LTS-SP1:不受影响,openEuler-20.03-LTS-SP4:不受影响,openEuler-22.03-LTS:不受影响,openEuler-22.03-LTS-SP1:不受影响,openEuler-22.03-LTS-SP2:不受影响,openEuler-22.03-LTS-SP3:不受影响,master:不受影响,openEuler-22.03-LTS-Next:不受影响,openEuler-24.03-LTS:不受影响,openEuler-24.03-LTS-Next:不受影响 |
已分析 | 5.修复是否涉及abi变化 | openEuler-20.03-LTS-SP1:否,openEuler-20.03-LTS-SP4:否,openEuler-22.03-LTS:否,openEuler-22.03-LTS-SP1:否,openEuler-22.03-LTS-SP2:否,openEuler-22.03-LTS-SP3:否,master:否,openEuler-22.03-LTS-Next:否,openEuler-24.03-LTS:否,openEuler-24.03-LTS-Next: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.
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