CVE-2021-45960

一、漏洞信息
 漏洞编号：[CVE-2021-45960](https://nvd.nist.gov/vuln/detail/CVE-2021-45960)
 漏洞归属组件：[mozjs78](https://gitee.com/src-openeuler/mozjs78)
 漏洞归属的版本：2.2.10
 CVSS V3.0分值：
  BaseScore：8.8 High
  Vector：CVSS：3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
 漏洞简述：
  In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) places in the storeAtts function in xmlparse.c can lead to realloc misbehavior (e.g., allocating too few bytes, or only freeing memory).
 漏洞公开时间：2022-01-02 03:15
 漏洞创建时间：2024-06-14 13:55:15
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2021-45960
<details>
<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |
| ------- | -------- | -------- |
| MISC | https://github.com/libexpat/libexpat/issues/531 |  |
| MISC | https://github.com/libexpat/libexpat/pull/534 |  |
| MISC | https://bugzilla.mozilla.org/show_bug.cgi?id=1217609 |  |
| MLIST | http://www.openwall.com/lists/oss-security/2022/01/17/3 |  |
| CONFIRM | https://security.netapp.com/advisory/ntap-20220121-0004/ |  |
| CONFIRM | https://www.tenable.com/security/tns-2022-05 |  |
| DEBIAN | https://www.debian.org/security/2022/dsa-5073 |  |
| CONFIRM | https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf |  |
| redhat | https://access.redhat.com/security/cve/CVE-2021-45960 |  |
| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-45960 |  |
| suse_bugzilla | http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-45960 |  |
| suse_bugzilla | https://github.com/libexpat/libexpat/issues/531 |  |
| suse_bugzilla | https://github.com/libexpat/libexpat/pull/534 |  |
| redhat_bugzilla | https://github.com/libexpat/libexpat/issues/531 |  |
| redhat_bugzilla | https://github.com/libexpat/libexpat/pull/534 |  |
| redhat_bugzilla | https://bugzilla.mozilla.org/show_bug.cgi?id=1217609 |  |
| ubuntu | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-45960 |  |
| ubuntu | https://github.com/libexpat/libexpat/issues/531 |  |
| ubuntu | https://github.com/libexpat/libexpat/pull/534 |  |
| ubuntu | https://bugzilla.mozilla.org/show_bug.cgi?id=1217609 |  |
| ubuntu | https://nvd.nist.gov/vuln/detail/CVE-2021-45960 |  |
| ubuntu | https://launchpad.net/bugs/cve/CVE-2021-45960 |  |
| ubuntu | https://security-tracker.debian.org/tracker/CVE-2021-45960 |  |
| ubuntu | http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1002994 |  |
| debian | https://security-tracker.debian.org/tracker/CVE-2021-45960 |  |
| oracle | https://www.oracle.com/security-alerts/linuxbulletinapr2022.html |  |
| github | https://github.com/libexpat/libexpat/issues/531 |  |
| github |  https://github.com/libexpat/libexpat/pull/534 |  |
| bugzilla |  https://bugzilla.mozilla.org/show_bug.cgi?id=1217609 |  |
| openwall |  http://www.openwall.com/lists/oss-security/2022/01/17/3 |  |
| security |  https://security.netapp.com/advisory/ntap-20220121-0004/ |  |
| tenable |  https://www.tenable.com/security/tns-2022-05 |  |
| debian |  https://www.debian.org/security/2022/dsa-5073 |  |

</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:
  其它
 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://github.com/libexpat/libexpat/pull/534 |  | MISC |
|  |  | https://github.com/libexpat/libexpat/pull/534 |  | suse_bugzilla |
|  |  | https://github.com/libexpat/libexpat/pull/534 |  | redhat_bugzilla |
|  |  | https://github.com/libexpat/libexpat/pull/534 |  | ubuntu |

</details>

二、漏洞分析结构反馈
 影响性分析说明：
        攻击者通过网络攻击的方式，利用精心制作的xml文件，触发漏洞的xml文件需要达到GB级别，导致xmlparse.c中的storeAtts函数中左移29个(或更多)位置可能会导致realloc行为不端(例如,分配的字节太少,或仅释放内存)。漏洞主要威胁系统的可用性   
 openEuler评分：
  8.8
 Vector：CVSS：3.0/AV:N/AC:L/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-20.03-LTS-SP4(78.4.0):受影响
2.master(78.15.0):不受影响
3.openEuler-22.03-LTS-SP1(91.6.0):不受影响
4.openEuler-22.03-LTS-SP3(91.6.0):不受影响
5.openEuler-22.03-LTS-SP4(91.6.0):不受影响
6.openEuler-24.03-LTS:不受影响

修复是否涉及abi变化(是/否)：
  1.master(78.15.0):否
2.openEuler-20.03-LTS-SP4(78.4.0):否
3.openEuler-22.03-LTS-SP1(91.6.0):否
4.openEuler-22.03-LTS-SP3(91.6.0):否
5.openEuler-22.03-LTS-SP4(91.6.0):否
6.openEuler-24.03-LTS:否
7.openEuler-24.03-LTS-Next:否

三、漏洞修复
安全公告链接：https://www.openeuler.org/zh/security/safety-bulletin/detail/?id=openEuler-SA-2024-1815

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