CVE-2023-51766

一、漏洞信息
 漏洞编号：[CVE-2023-51766](https://nvd.nist.gov/vuln/detail/CVE-2023-51766)
 漏洞归属组件：[exim](https://gitee.com/src-openeuler/exim)
 漏洞归属的版本：4.96
 CVSS V3.0分值：
  BaseScore：5.3 Medium
  Vector：CVSS：3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
 漏洞简述：
  Exim before 4.97.1 allows SMTP smuggling in certain PIPELINING/CHUNKING configurations. Remote attackers can use a published exploitation technique to inject e-mail messages with a spoofed MAIL FROM address, allowing bypass of an SPF protection mechanism. This occurs because Exim supports <LF>.<CR><LF> but some other popular e-mail servers do not.
 漏洞公开时间：2023-12-24 14:15:07
 漏洞创建时间：2023-12-24 14:39:32
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2023-51766
<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/2023/12/24/1 |  |
| cve.mitre.org | http://www.openwall.com/lists/oss-security/2023/12/25/1 |  |
| cve.mitre.org | http://www.openwall.com/lists/oss-security/2023/12/29/2 |  |
| cve.mitre.org | http://www.openwall.com/lists/oss-security/2024/01/01/1 |  |
| cve.mitre.org | http://www.openwall.com/lists/oss-security/2024/01/01/2 |  |
| cve.mitre.org | http://www.openwall.com/lists/oss-security/2024/01/01/3 |  |
| cve.mitre.org | https://bugs.exim.org/show_bug.cgi?id=3063 |  |
| cve.mitre.org | https://bugzilla.redhat.com/show_bug.cgi?id=2255852 |  |
| cve.mitre.org | https://exim.org/static/doc/security/CVE-2023-51766.txt |  |
| cve.mitre.org | https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.html |  |
| cve.mitre.org | https://git.exim.org/exim.git/commit/5bb786d5ad568a88d50d15452aacc8404047e5ca |  |
| cve.mitre.org | https://git.exim.org/exim.git/commit/cf1376206284f2a4f11e32d931d4aade34c206c5 |  |
| cve.mitre.org | https://github.com/Exim/exim/blob/master/doc/doc-txt/cve-2023-51766 |  |
| cve.mitre.org | https://lists.debian.org/debian-lts-announce/2024/01/msg00002.html |  |
| cve.mitre.org | https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ORN7OKEQPPBKUHYRQ6LR5PSNBQVDHAWB/ |  |
| cve.mitre.org | https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QPDWHJPABVJCXDSNELSSVTIVAJU2MDUQ/ |  |
| cve.mitre.org | https://lwn.net/Articles/956533/ |  |
| cve.mitre.org | https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/ |  |
| cve.mitre.org | https://www.openwall.com/lists/oss-security/2023/12/23/2 |  |
| cve.mitre.org | https://www.youtube.com/watch?v=V8KPV96g1To |  |
| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-51766 | https://bugzilla.suse.com/show_bug.cgi?id=1218387 |
| redhat_bugzilla | https://bugs.exim.org/show_bug.cgi?id=3063 | https://bugzilla.redhat.com/show_bug.cgi?id=2255852 |
| redhat_bugzilla | https://security-tracker.debian.org/tracker/CVE-2023-51766 | https://bugzilla.redhat.com/show_bug.cgi?id=2255852 |
| redhat_bugzilla | https://www.cve.org/CVERecord?id=CVE-2023-51766 | https://bugzilla.redhat.com/show_bug.cgi?id=2255852 |
| debian |  | https://security-tracker.debian.org/tracker/CVE-2023-51766 |
| gentoo |  | https://security.gentoo.org/glsa/202402-18 |
| cve_search |  | https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/ |
| cve_search |  | https://exim.org/static/doc/security/CVE-2023-51766.txt |
| cve_search |  | https://bugs.exim.org/show_bug.cgi?id=3063 |
| cve_search |  | https://www.openwall.com/lists/oss-security/2023/12/23/2 |
| cve_search |  | http://www.openwall.com/lists/oss-security/2023/12/24/1 |
| cve_search |  | http://www.openwall.com/lists/oss-security/2023/12/25/1 |
| cve_search |  | https://git.exim.org/exim.git/commit/5bb786d5ad568a88d50d15452aacc8404047e5ca |
| cve_search |  | https://git.exim.org/exim.git/commit/cf1376206284f2a4f11e32d931d4aade34c206c5 |
| cve_search |  | https://bugzilla.redhat.com/show_bug.cgi?id=2255852 |
| cve_search |  | https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.html |
| cve_search |  | http://www.openwall.com/lists/oss-security/2023/12/29/2 |
| cve_search |  | https://github.com/Exim/exim/blob/master/doc/doc-txt/cve-2023-51766 |
| cve_search |  | http://www.openwall.com/lists/oss-security/2024/01/01/1 |
| cve_search |  | http://www.openwall.com/lists/oss-security/2024/01/01/2 |
| cve_search |  | http://www.openwall.com/lists/oss-security/2024/01/01/3 |
| cve_search |  | https://www.youtube.com/watch?v=V8KPV96g1To |
| cve_search |  | https://lists.debian.org/debian-lts-announce/2024/01/msg00002.html |
| cve_search |  | https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QPDWHJPABVJCXDSNELSSVTIVAJU2MDUQ/ |
| cve_search |  | https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ORN7OKEQPPBKUHYRQ6LR5PSNBQVDHAWB/ |
| cve_search |  | https://lwn.net/Articles/956533/ |
| amazon_linux_explore | https://access.redhat.com/security/cve/CVE-2023-51766 | https://explore.alas.aws.amazon.com/CVE-2023-51766.html |
| amazon_linux_explore | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-51766 | https://explore.alas.aws.amazon.com/CVE-2023-51766.html |
| snyk | https://bugs.exim.org/show_bug.cgi?id=3063 | https://security.snyk.io/vuln/SNYK-UNMANAGED-EXIMEXIM-6139277 |
| snyk | https://github.com/Exim/exim/commit/5bb786d5ad568a88d50d15452aacc8404047e5ca | https://security.snyk.io/vuln/SNYK-UNMANAGED-EXIMEXIM-6139277 |
| snyk | https://github.com/Exim/exim/commit/cf1376206284f2a4f11e32d931d4aade34c206c5 | https://security.snyk.io/vuln/SNYK-UNMANAGED-EXIMEXIM-6139277 |
| snyk | https://www.openwall.com/lists/oss-security/2023/12/23/2 | https://security.snyk.io/vuln/SNYK-UNMANAGED-EXIMEXIM-6139277 |
| snyk | https://exim.org/static/doc/security/CVE-2023-51766.txt | https://security.snyk.io/vuln/SNYK-UNMANAGED-EXIMEXIM-6139277 |
| snyk | https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/ | https://security.snyk.io/vuln/SNYK-UNMANAGED-EXIMEXIM-6139277 |
| cve.mitre.org | https://lists.debian.org/debian-lts-announce/2024/01/msg00002.html |  |
| cve.mitre.org | https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ORN7OKEQPPBKUHYRQ6LR5PSNBQVDHAWB/ |  |
| cve.mitre.org | https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QPDWHJPABVJCXDSNELSSVTIVAJU2MDUQ/ |  |
| cve.mitre.org | https://lwn.net/Articles/956533/ |  |
| cve.mitre.org | https://www.youtube.com/watch?v=V8KPV96g1To |  |
| cve.mitre.org | http://www.openwall.com/lists/oss-security/2023/12/24/1 |  |
| cve.mitre.org | http://www.openwall.com/lists/oss-security/2023/12/25/1 |  |
| cve.mitre.org | http://www.openwall.com/lists/oss-security/2023/12/29/2 |  |
| cve.mitre.org | http://www.openwall.com/lists/oss-security/2024/01/01/1 |  |
| cve.mitre.org | http://www.openwall.com/lists/oss-security/2024/01/01/2 |  |
| cve.mitre.org | http://www.openwall.com/lists/oss-security/2024/01/01/3 |  |
| cve.mitre.org | https://bugs.exim.org/show_bug.cgi?id=3063 |  |
| cve.mitre.org | https://bugzilla.redhat.com/show_bug.cgi?id=2255852 |  |
| cve.mitre.org | https://exim.org/static/doc/security/CVE-2023-51766.txt |  |
| cve.mitre.org | https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.html |  |
| cve.mitre.org | https://git.exim.org/exim.git/commit/5bb786d5ad568a88d50d15452aacc8404047e5ca |  |
| cve.mitre.org | https://git.exim.org/exim.git/commit/cf1376206284f2a4f11e32d931d4aade34c206c5 |  |
| cve.mitre.org | https://github.com/Exim/exim/blob/master/doc/doc-txt/cve-2023-51766 |  |
| cve.mitre.org | https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/ |  |
| cve.mitre.org | https://www.openwall.com/lists/oss-security/2023/12/23/2 |  |

</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://git.exim.org/exim.git/commit/5bb786d5ad568a88d50d15452aacc8404047e5ca |  | cve.mitre.org |
|  |  | https://git.exim.org/exim.git/commit/cf1376206284f2a4f11e32d931d4aade34c206c5 |  | cve.mitre.org |
|  |  | https://github.com/Exim/exim/commit/5bb786d5ad568a88d50d15452aacc8404047e5ca |  | snyk |
|  |  | https://github.com/Exim/exim/commit/cf1376206284f2a4f11e32d931d4aade34c206c5 |  | snyk |
|  |  | http://www.openwall.com/lists/oss-security/2023/12/24/1 |  | nvd |
|  |  | http://www.openwall.com/lists/oss-security/2023/12/25/1 |  | nvd |
|  |  | http://www.openwall.com/lists/oss-security/2023/12/29/2 |  | nvd |
|  |  | http://www.openwall.com/lists/oss-security/2024/01/01/1 |  | nvd |
|  |  | http://www.openwall.com/lists/oss-security/2024/01/01/2 |  | nvd |
|  |  | http://www.openwall.com/lists/oss-security/2024/01/01/3 |  | nvd |
|  |  | https://bugs.exim.org/show_bug.cgi?id=3063 |  | nvd |
|  |  | https://bugzilla.redhat.com/show_bug.cgi?id=2255852 |  | nvd |
|  |  | https://exim.org/static/doc/security/CVE-2023-51766.txt |  | nvd |
|  |  | https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.html |  | nvd |
|  |  | https://git.exim.org/exim.git/commit/5bb786d5ad568a88d50d15452aacc8404047e5ca |  | nvd |
|  |  | https://git.exim.org/exim.git/commit/cf1376206284f2a4f11e32d931d4aade34c206c5 |  | nvd |
|  |  | https://github.com/Exim/exim/blob/master/doc/doc-txt/cve-2023-51766 |  | nvd |
|  |  | https://lists.debian.org/debian-lts-announce/2024/01/msg00002.html |  | nvd |
|  |  | https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ORN7OKEQPPBKUHYRQ6LR5PSNBQVDHAWB/ |  | nvd |
|  |  | https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QPDWHJPABVJCXDSNELSSVTIVAJU2MDUQ/ |  | nvd |
|  |  | https://lwn.net/Articles/956533/ |  | nvd |
|  |  | https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/ |  | nvd |
|  |  | https://www.openwall.com/lists/oss-security/2023/12/23/2 |  | nvd |
|  |  | https://www.youtube.com/watch?v=V8KPV96g1To |  | nvd |

</details>

二、漏洞分析结构反馈
 影响性分析说明：
    Exim before 4.97.1 allows SMTP smuggling in certain PIPELINING/CHUNKING configurations. Remote attackers can use a published exploitation technique to inject e-mail messages with a spoofed MAIL FROM address, allowing bypass of an SPF protection mechanism. This occurs because Exim supports . but some other popular e-mail servers do not. 
 openEuler评分：
  5.3
 Vector：CVSS：3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
 受影响版本排查(受影响/不受影响)：
  1.master(4.97.1):受影响
2.openEuler-24.03-LTS(4.97.1):受影响
3.openEuler-24.03-LTS-Next(4.97.1):受影响
4.openEuler-22.03-LTS-SP4(4.96):受影响
5.openEuler-22.03-LTS-SP3(4.96):受影响
6.openEuler-22.03-LTS-SP1:不受影响
7.openEuler-20.03-LTS-SP4:不受影响

修复是否涉及abi变化(是/否)：
  1.master(4.97.1):否
2.openEuler-24.03-LTS(4.97.1):否
3.openEuler-24.03-LTS-Next(4.97.1):否
4.openEuler-22.03-LTS-SP4(4.96):否
5.openEuler-22.03-LTS-SP1:否
6.openEuler-22.03-LTS-SP3(4.96):否
7.openEuler-20.03-LTS-SP4:否

三、漏洞修复
安全公告链接：https://www.openeuler.org/zh/security/safety-bulletin/detail/?id=openEuler-SA-2024-1928

@AlexZ11 ,@small_leek ,@jimmy_hero ,@zhuchunyi 
**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(4.96):
2.openEuler-20.03-LTS-SP1:
3.openEuler-20.03-LTS-SP3:
4.openEuler-20.03-LTS-SP4:
5.openEuler-22.03-LTS:
6.openEuler-22.03-LTS-Next(4.96):
7.openEuler-22.03-LTS-SP1:
8.openEuler-22.03-LTS-SP2(4.96):
9.openEuler-22.03-LTS-SP3:

修复是否涉及abi变化(是/否)：
1.master(4.96):
2.openEuler-20.03-LTS-SP1:
3.openEuler-20.03-LTS-SP3:
4.openEuler-20.03-LTS-SP4:
5.openEuler-22.03-LTS:
6.openEuler-22.03-LTS-Next(4.96):
7.openEuler-22.03-LTS-SP1:
8.openEuler-22.03-LTS-SP2(4.96):
9.openEuler-22.03-LTS-SP3:

-----------------------------------------------------------------------
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

<table><tr><th white-space: nowrap;>参考网址</th> <th white-space: nowrap;>关联pr</th> <th white-space: nowrap;>状态</th> <th white-space: nowrap;>补丁链接</th></tr><tr><td>https://nvd.nist.gov/vuln/detail/CVE-2023-51766</td><td></td><td></td><td></td></tr><tr><td rowspan="1">https://ubuntu.com/security/CVE-2023-51766</td><td>None</td><td>None</td><td><a href=https://discourse.ubuntu.com/c/ubuntu-pro>https://discourse.ubuntu.com/c/ubuntu-pro</a></td></tr><tr><td>https://www.opencve.io/cve/CVE-2023-51766</td><td></td><td></td><td></td></tr><tr><td>https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2023-51766</td><td></td><td></td><td></td></tr></table>

> 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](https://gitee.com/openeuler/cve-manager/blob/master/cve-agency-manager/cve_tracking/README.md)。
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

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