CVE-2021-33646

一、漏洞信息
 漏洞编号：[CVE-2021-33646](https://nvd.nist.gov/vuln/detail/CVE-2021-33646)
 漏洞归属组件：[libtar](https://gitee.com/src-openeuler/libtar)
 漏洞归属的版本：1.2.20
 CVSS V3.0分值：
  BaseScore：6.2 Medium
  Vector：CVSS：3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
 漏洞简述：
  The th_read() function doesn’t free a variable t->th_buf.gnu_longname after allocating memory, which may cause a memory leak.
 漏洞公开时间：2022-08-11 04:15:00
 漏洞创建时间：2022-07-26 16:23:26
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2021-33646
<details>
<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |
| ------- | -------- | -------- |
| nvd | https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1807 |  |
| nvd | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OD4HEBSTI22FNYKOKK7W3X6ZQE6FV3XC/ |  |
| nvd | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5YSHZY753R7XW6CIKJVAWI373WW3YRRJ/ |  |
| nvd | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7Q26QDNOJDOFYWMJWEIK5XR62M2FF6IJ/ |  |
| nvd | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4S4PJRCJLEAWN2EKXGLSOBTL7O57V7NC/ |  |
| nvd | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7WX5YE66CT7Y5C2HTHXSFDKQWYWYWJ2T/ |  |
| redhat | https://access.redhat.com/security/cve/CVE-2021-33646 |  |
| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-33646 | https://bugzilla.suse.com/show_bug.cgi?id=1202320 |
| suse_bugzilla | http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33646 | https://bugzilla.suse.com/show_bug.cgi?id=1202320 |
| suse_bugzilla | https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1807 | https://bugzilla.suse.com/show_bug.cgi?id=1202320 |
| redhat_bugzilla | https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1807 | https://bugzilla.redhat.com/show_bug.cgi?id=2121297 |
| redhat_bugzilla | https://repo.openeuler.org/openEuler-22.03-LTS/update/source/Packages/libtar-1.2.20-21.oe2203.src.rpm | https://bugzilla.redhat.com/show_bug.cgi?id=2121297 |
| redhat_bugzilla | https://www.openeuler.org/en/security/safety-bulletin/detail. | https://bugzilla.redhat.com/show_bug.cgi?id=2121297 |
| ubuntu | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33646 | https://ubuntu.com/security/CVE-2021-33646 |
| ubuntu | https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1807 | https://ubuntu.com/security/CVE-2021-33646 |
| ubuntu | https://nvd.nist.gov/vuln/detail/CVE-2021-33646 | https://ubuntu.com/security/CVE-2021-33646 |
| ubuntu | https://launchpad.net/bugs/cve/CVE-2021-33646 | https://ubuntu.com/security/CVE-2021-33646 |
| ubuntu | https://security-tracker.debian.org/tracker/CVE-2021-33646 | https://ubuntu.com/security/CVE-2021-33646 |
| debian |  | https://security-tracker.debian.org/tracker/CVE-2021-33646 |
| cve_search |  | https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1807 |
| cve_search |  | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OD4HEBSTI22FNYKOKK7W3X6ZQE6FV3XC/ |
| cve_search |  | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5YSHZY753R7XW6CIKJVAWI373WW3YRRJ/ |
| cve_search |  | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7Q26QDNOJDOFYWMJWEIK5XR62M2FF6IJ/ |
| cve_search |  | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4S4PJRCJLEAWN2EKXGLSOBTL7O57V7NC/ |
| cve_search |  | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7WX5YE66CT7Y5C2HTHXSFDKQWYWYWJ2T/ |
| mageia |  | http://advisories.mageia.org/MGASA-2022-0335.html |
| amazon_linux | https://alas.aws.amazon.com/cve/html/CVE-2022-2257.html | https://alas.aws.amazon.com/ALAS-2022-1639.html |
| amazon_linux | https://alas.aws.amazon.com/cve/html/CVE-2022-2264.html | https://alas.aws.amazon.com/ALAS-2022-1639.html |
| amazon_linux | https://alas.aws.amazon.com/cve/html/CVE-2022-2284.html | https://alas.aws.amazon.com/ALAS-2022-1639.html |
| amazon_linux | https://alas.aws.amazon.com/cve/html/CVE-2022-2285.html | https://alas.aws.amazon.com/ALAS-2022-1639.html |
| amazon_linux | https://alas.aws.amazon.com/cve/html/CVE-2022-2286.html | https://alas.aws.amazon.com/ALAS-2022-1639.html |
| amazon_linux | https://alas.aws.amazon.com/cve/html/CVE-2022-2287.html | https://alas.aws.amazon.com/ALAS-2022-1639.html |
| amazon_linux | https://alas.aws.amazon.com/cve/html/CVE-2022-2288.html | https://alas.aws.amazon.com/ALAS-2022-1639.html |
| amazon_linux | https://alas.aws.amazon.com/cve/html/CVE-2022-2289.html | https://alas.aws.amazon.com/ALAS-2022-1639.html |
| amazon_linux | https://alas.aws.amazon.com/cve/html/CVE-2022-2304.html | https://alas.aws.amazon.com/ALAS-2022-1639.html |
| amazon_linux | https://alas.aws.amazon.com/cve/html/CVE-2022-2343.html | https://alas.aws.amazon.com/ALAS-2022-1639.html |
| amazon_linux | https://alas.aws.amazon.com/cve/html/CVE-2022-2344.html | https://alas.aws.amazon.com/ALAS-2022-1639.html |
| amazon_linux | https://alas.aws.amazon.com/cve/html/CVE-2022-2345.html | https://alas.aws.amazon.com/ALAS-2022-1639.html |
| amazon_linux | https://alas.aws.amazon.com/cve/html/CVE-2022-2816.html | https://alas.aws.amazon.com/ALAS-2022-1639.html |
| amazon_linux | https://alas.aws.amazon.com/cve/html/CVE-2022-2817.html | https://alas.aws.amazon.com/ALAS-2022-1639.html |
| amazon_linux | https://alas.aws.amazon.com/cve/html/CVE-2022-2819.html | https://alas.aws.amazon.com/ALAS-2022-1639.html |
| amazon_linux | https://alas.aws.amazon.com/cve/html/CVE-2022-3037.html | https://alas.aws.amazon.com/ALAS-2022-1639.html |
| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-33646 |  |
| suse_bugzilla | http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33646 |  |
| suse_bugzilla | https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1807 |  |
| redhat_bugzilla | https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1807 |  |
| redhat_bugzilla | https://repo.openeuler.org/openEuler-22.03-LTS/update/source/Packages/libtar-1.2.20-21.oe2203.src.rpm |  |
| redhat_bugzilla | https://www.openeuler.org/en/security/safety-bulletin/detail. |  |
| redhat_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2121297 |  |
| ubuntu | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33646 |  |
| ubuntu | https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1807 |  |
| ubuntu | https://nvd.nist.gov/vuln/detail/CVE-2021-33646 |  |
| ubuntu | https://launchpad.net/bugs/cve/CVE-2021-33646 |  |
| ubuntu | https://security-tracker.debian.org/tracker/CVE-2021-33646 |  |
| debian | https://security-tracker.debian.org/tracker/CVE-2021-33646 |  |
| nvd | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OD4HEBSTI22FNYKOKK7W3X6ZQE6FV3XC/ |  |
| nvd | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5YSHZY753R7XW6CIKJVAWI373WW3YRRJ/ |  |
| nvd | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7Q26QDNOJDOFYWMJWEIK5XR62M2FF6IJ/ |  |

</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>

无
</details>

二、漏洞分析结构反馈
 影响性分析说明：
        使用libtar解析tar包，在th_read()函数LONGNAME分支中，最后一轮读取的t->th_buf.gnu_longname 没有释放，存在内存泄露，可导致进程崩溃如果此组件用于外部服务接口提供zip解包服务，可能会导致无权限的拒绝服务攻击.   
 openEuler评分：
  6.2
 Vector：CVSS：3.0/AV:L/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.openEuler-20.03-LTS-SP1(1.2.20):受影响
2.openEuler-20.03-LTS-SP3(1.2.20):受影响
3.openEuler-22.03-LTS(1.2.20):受影响

修复是否涉及abi变化(是/否)：
  1.openEuler-22.03-LTS(1.2.20):否
2.openEuler-20.03-LTS-SP3(1.2.20):否
3.openEuler-22.03-LTS(1.2.20):否

三、漏洞修复
安全公告链接：https://www.openeuler.org/zh/security/safety-bulletin/detail/?id=openEuler-SA-2022-1807

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