CVE-2023-50868

一、漏洞信息
 漏洞编号：[CVE-2023-50868](https://nvd.nist.gov/vuln/detail/CVE-2023-50868)
 漏洞归属组件：[bind](https://gitee.com/src-openeuler/bind)
 漏洞归属的版本：9.11.21,9.11.4,9.16.23,9.16.37,9.18.21,9.18.33
 CVSS V2.0分值：
  BaseScore：N/A None
  Vector：CVSS：2.0/
 漏洞简述：
  The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped) allows remote attackers to cause a denial of service (CPU consumption for SHA-1 computations) via DNSSEC responses in a random subdomain attack, aka the  NSEC3  issue. The RFC 5155 specification implies that an algorithm must perform thousands of iterations of a hash function in certain situations.
 漏洞公开时间：2024-02-15 00:15:45
 漏洞创建时间：2024-02-13 16:32:33
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2023-50868
<details>
<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |
| ------- | -------- | -------- |
| cve.mitre.org | http://www.openwall.com/lists/oss-security/2024/02/16/2 |  |
| cve.mitre.org | http://www.openwall.com/lists/oss-security/2024/02/16/3 |  |
| cve.mitre.org | https://access.redhat.com/security/cve/CVE-2023-50868 |  |
| cve.mitre.org | https://bugzilla.suse.com/show_bug.cgi?id=1219826 |  |
| cve.mitre.org | https://datatracker.ietf.org/doc/html/rfc5155 |  |
| cve.mitre.org | https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2024-01.html |  |
| cve.mitre.org | https://gitlab.nic.cz/knot/knot-resolver/-/releases/v5.7.1 |  |
| cve.mitre.org | https://kb.isc.org/docs/cve-2023-50868 |  |
| cve.mitre.org | https://lists.debian.org/debian-lts-announce/2024/02/msg00006.html |  |
| cve.mitre.org | https://lists.debian.org/debian-lts-announce/2024/05/msg00011.html |  |
| cve.mitre.org | https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6FV5O347JTX7P5OZA6NGO4MKTXRXMKOZ/ |  |
| cve.mitre.org | https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BUIP7T7Z4T3UHLXFWG6XIVDP4GYPD3AI/ |  |
| cve.mitre.org | https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HVRDSJVZKMCXKKPP6PNR62T7RWZ3YSDZ/ |  |
| cve.mitre.org | https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IGSLGKUAQTW5JPPZCMF5YPEYALLRUZZ6/ |  |
| cve.mitre.org | https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/ |  |
| cve.mitre.org | https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RGS7JN6FZXUSTC2XKQHH27574XOULYYJ/ |  |
| cve.mitre.org | https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SVYA42BLXUCIDLD35YIJPJSHDIADNYMP/ |  |
| cve.mitre.org | https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TEXGOYGW7DBS3N2QSSQONZ4ENIRQEAPG/ |  |
| cve.mitre.org | https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UQESRWMJCF4JEYJEAKLRM6CT55GLJAB7/ |  |
| cve.mitre.org | https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/ |  |
| cve.mitre.org | https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2024q1/017430.html |  |
| cve.mitre.org | https://nlnetlabs.nl/news/2024/Feb/13/unbound-1.19.1-released/ |  |
| cve.mitre.org | https://security.netapp.com/advisory/ntap-20240307-0008/ |  |
| cve.mitre.org | https://www.isc.org/blogs/2024-bind-security-release/ |  |
| af854a3a-2127-422b-91ae-364da2661108 | http://www.openwall.com/lists/oss-security/2024/02/16/2 |  |
| af854a3a-2127-422b-91ae-364da2661108 | http://www.openwall.com/lists/oss-security/2024/02/16/3 |  |
| af854a3a-2127-422b-91ae-364da2661108 | https://access.redhat.com/security/cve/CVE-2023-50868 |  |
| af854a3a-2127-422b-91ae-364da2661108 | https://bugzilla.suse.com/show_bug.cgi?id=1219826 |  |
| af854a3a-2127-422b-91ae-364da2661108 | https://datatracker.ietf.org/doc/html/rfc5155 |  |
| af854a3a-2127-422b-91ae-364da2661108 | https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2024-01.html |  |
| af854a3a-2127-422b-91ae-364da2661108 | https://gitlab.nic.cz/knot/knot-resolver/-/releases/v5.7.1 |  |
| af854a3a-2127-422b-91ae-364da2661108 | https://kb.isc.org/docs/cve-2023-50868 |  |
| af854a3a-2127-422b-91ae-364da2661108 | https://lists.debian.org/debian-lts-announce/2024/02/msg00006.html |  |
| af854a3a-2127-422b-91ae-364da2661108 | https://lists.debian.org/debian-lts-announce/2024/05/msg00011.html |  |
| af854a3a-2127-422b-91ae-364da2661108 | https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6FV5O347JTX7P5OZA6NGO4MKTXRXMKOZ/ |  |
| af854a3a-2127-422b-91ae-364da2661108 | https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BUIP7T7Z4T3UHLXFWG6XIVDP4GYPD3AI/ |  |
| af854a3a-2127-422b-91ae-364da2661108 | https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HVRDSJVZKMCXKKPP6PNR62T7RWZ3YSDZ/ |  |
| af854a3a-2127-422b-91ae-364da2661108 | https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IGSLGKUAQTW5JPPZCMF5YPEYALLRUZZ6/ |  |
| af854a3a-2127-422b-91ae-364da2661108 | https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/ |  |
| af854a3a-2127-422b-91ae-364da2661108 | https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RGS7JN6FZXUSTC2XKQHH27574XOULYYJ/ |  |
| af854a3a-2127-422b-91ae-364da2661108 | https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SVYA42BLXUCIDLD35YIJPJSHDIADNYMP/ |  |
| af854a3a-2127-422b-91ae-364da2661108 | https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TEXGOYGW7DBS3N2QSSQONZ4ENIRQEAPG/ |  |
| af854a3a-2127-422b-91ae-364da2661108 | https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UQESRWMJCF4JEYJEAKLRM6CT55GLJAB7/ |  |
| af854a3a-2127-422b-91ae-364da2661108 | https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/ |  |
| af854a3a-2127-422b-91ae-364da2661108 | https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2024q1/017430.html |  |
| af854a3a-2127-422b-91ae-364da2661108 | https://nlnetlabs.nl/news/2024/Feb/13/unbound-1.19.1-released/ |  |
| af854a3a-2127-422b-91ae-364da2661108 | https://security.netapp.com/advisory/ntap-20240307-0008/ |  |
| af854a3a-2127-422b-91ae-364da2661108 | https://www.isc.org/blogs/2024-bind-security-release/ |  |
| redhat_bugzilla | https://fosstodon.org/@tychotithonus@infosec.exchange/111924626751024210 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://github.com/NLnetLabs/unbound/releases/tag/release-1.19.1 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2024q1/017430.html | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://kb.isc.org/docs/cve-2023-50868 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:0965 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:0977 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:0981 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:0982 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:1334 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:1335 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:1522 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:1543 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:1544 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:1545 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:1647 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:1648 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:1781 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:1782 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:1789 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:1801 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:1800 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:1804 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:1803 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:2551 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:2587 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:2696 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:2720 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:2721 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:2821 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:2890 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:3271 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:3741 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:3877 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:3929 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:11003 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2025:0039 | https://bugzilla.redhat.com/show_bug.cgi?id=2263917 |
| ubuntu | https://kb.isc.org/docs/cve-2023-50868 | https://ubuntu.com/security/CVE-2023-50868 |
| ubuntu | https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2024q1/017430.html | https://ubuntu.com/security/CVE-2023-50868 |
| ubuntu | https://www.knot-resolver.cz/2024-02-13-knot-resolver-5.7.1.html | https://ubuntu.com/security/CVE-2023-50868 |
| ubuntu | https://blog.powerdns.com/2024/02/13/powerdns-recursor-4-8-6-4-9-3-5-0-2-released | https://ubuntu.com/security/CVE-2023-50868 |
| ubuntu | https://nlnetlabs.nl/news/2024/Feb/13/unbound-1.19.1-released/ | https://ubuntu.com/security/CVE-2023-50868 |
| ubuntu | https://nlnetlabs.nl/downloads/unbound/CVE-2023-50387_CVE-2023-50868.txt | https://ubuntu.com/security/CVE-2023-50868 |
| ubuntu | https://ubuntu.com/security/notices/USN-6633-1 | https://ubuntu.com/security/CVE-2023-50868 |
| ubuntu | https://ubuntu.com/security/notices/USN-6642-1 | https://ubuntu.com/security/CVE-2023-50868 |
| ubuntu | https://ubuntu.com/security/notices/USN-6657-1 | https://ubuntu.com/security/CVE-2023-50868 |
| ubuntu | https://ubuntu.com/security/notices/USN-6665-1 | https://ubuntu.com/security/CVE-2023-50868 |
| ubuntu | https://ubuntu.com/security/notices/USN-6723-1 | https://ubuntu.com/security/CVE-2023-50868 |
| ubuntu | https://www.cve.org/CVERecord?id=CVE-2023-50868 | https://ubuntu.com/security/CVE-2023-50868 |
| ubuntu | https://ubuntu.com/security/notices/USN-6657-2 | https://ubuntu.com/security/CVE-2023-50868 |
| ubuntu | https://nvd.nist.gov/vuln/detail/CVE-2023-50868 | https://ubuntu.com/security/CVE-2023-50868 |
| ubuntu | https://launchpad.net/bugs/cve/CVE-2023-50868 | https://ubuntu.com/security/CVE-2023-50868 |
| ubuntu | https://security-tracker.debian.org/tracker/CVE-2023-50868 | https://ubuntu.com/security/CVE-2023-50868 |

</details>

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：
  <details>
<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源  |
| ------- | -------- | ------- | -------- | --------- |
|  |  | https://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=3ae7f1ab0d847b17fdc95fd0e5b3120f66dc3af9 |  | snyk |
| bind9 |  | https://github.com/NLnetLabs/unbound/commit/92f2a1ca690a44880f4c4fa70a4b5a4b029aaf1c |  | ubuntu |
|  |  | https://github.com/PowerDNS/pdns/pull/13781 |  | debian |
|  |  | https://github.com/NLnetLabs/unbound/commit/92f2a1ca690a44880f4c4fa70a4b5a4b029aaf1c |  | debian |
|  |  | https://www.nlnetlabs.nl/downloads/unbound/patch_CVE-2023-50387_CVE-2023-50868.diff |  | unbound |

</details>

二、漏洞分析结构反馈
 影响性分析说明：
                  DNS协议中的Closest Encloser Proof方面（在跳过RFC 9276指导时的RFC 5155中）允许远程攻击者通过DNSSEC响应在随机子域攻击中导致拒绝服务（CPU消耗用于SHA-1计算），也被称为NSEC3问题。RFC 5155规范意味着在某些情况下，算法必须执行数千次哈希函数迭代；        
 openEuler评分：
  7.5
 Vector：CVSS：2.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
 受影响版本排查(受影响/不受影响)：
  1.master(9.18.33):受影响
2.openEuler-20.03-LTS-SP1(9.11.21):受影响
3.openEuler-20.03-LTS-SP4(9.11.21):受影响
4.openEuler-22.03-LTS(9.16.23):受影响
5.openEuler-22.03-LTS-Next(9.16.23):受影响
6.openEuler-22.03-LTS-SP1(9.16.23):受影响
7.openEuler-22.03-LTS-SP2(9.16.23):受影响
8.openEuler-22.03-LTS-SP3(9.16.23):受影响
9.openEuler-24.03-LTS(9.18.21):受影响

修复是否涉及abi变化(是/否)：
  1.master(9.18.33):否
2.openEuler-20.03-LTS-SP1(9.11.21):否
3.openEuler-20.03-LTS-SP4(9.11.21):否
4.openEuler-22.03-LTS(9.16.23):否
5.openEuler-22.03-LTS-Next(9.16.23):否
6.openEuler-22.03-LTS-SP1(9.16.23):否
7.openEuler-22.03-LTS-SP2(9.16.23):否
8.openEuler-22.03-LTS-SP3(9.16.23):否
9.openEuler-24.03-LTS(9.18.21):否

原因说明：
  1.master(9.18.33):
2.openEuler-20.03-LTS-SP4(9.11.21):
3.openEuler-22.03-LTS-SP3(9.16.23):
4.openEuler-22.03-LTS-SP4(9.16.23):
5.openEuler-24.03-LTS(9.18.21):
6.openEuler-24.03-LTS-Next(9.18.21):
7.openEuler-24.03-LTS-SP1(9.18.21):
8.openEuler-24.03-LTS-SP2(9.18.21):

三、漏洞修复
安全公告链接：https://www.openeuler.org/zh/security/safety-bulletin/detail/?id=openEuler-SA-2025-2609

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