CVE-2021-20193

一、漏洞信息
 漏洞编号：[CVE-2021-20193](https://nvd.nist.gov/vuln/detail/CVE-2021-20193)
 漏洞归属组件：[tar](https://gitee.com/src-openeuler/tar)
 漏洞归属的版本：1.30,1.32
 CVSS V3.0分值：
  BaseScore：5.5 Medium
  Vector：CVSS：3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
 漏洞简述：
  A flaw was found in the src/list.c of tar 1.33 and earlier. This flaw allows an attacker who can submit a crafted input file to tar to cause uncontrolled consumption of memory. The highest threat from this vulnerability is to system availability.
 漏洞公开时间：2021-03-27 01:15
 漏洞创建时间：2021-04-02 11:55:18
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2021-20193
<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://savannah.gnu.org/bugs/?59897 |  |
| MISC | https://bugzilla.redhat.com/show_bug.cgi?id=1917565 |  |
| MISC | https://git.savannah.gnu.org/cgit/tar.git/commit/?id=d9d4435692150fa8ff68e1b1a473d187cc3fd777 |  |
| GENTOO | https://security.gentoo.org/glsa/202105-29 |  |
| redhat | https://access.redhat.com/security/cve/CVE-2021-20193 |  |
| redhat_bugzilla | https://savannah.gnu.org/bugs/?59897 |  |
| ubuntu | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20193 |  |
| ubuntu | https://savannah.gnu.org/bugs/?59897 |  |
| ubuntu | https://git.savannah.gnu.org/cgit/tar.git/commit/?id=d9d4435692150fa8ff68e1b1a473d187cc3fd777 |  |
| ubuntu | https://nvd.nist.gov/vuln/detail/CVE-2021-20193 |  |
| ubuntu | https://launchpad.net/bugs/cve/CVE-2021-20193 |  |
| ubuntu | https://security-tracker.debian.org/tracker/CVE-2021-20193 |  |
| ubuntu | http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=980525 |  |
| ubuntu | https://bugs.launchpad.net/ubuntu/+source/tar/+bug/1912091 |  |
| debian | https://security-tracker.debian.org/tracker/CVE-2021-20193 |  |
| oracle | https://www.oracle.com/security-alerts/bulletinjul2021.html |  |
| gentoo | https://security.gentoo.org/glsa/202105-29 |  |
| savannah | https://savannah.gnu.org/bugs/?59897 |  |
| bugzilla |  https://bugzilla.redhat.com/show_bug.cgi?id=1917565 |  |
| git |  https://git.savannah.gnu.org/cgit/tar.git/commit/?id=d9d4435692150fa8ff68e1b1a473d187cc3fd777 |  |
| security |  https://security.gentoo.org/glsa/202105-29 |  |

</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://git.savannah.gnu.org/cgit/tar.git/commit/?id=d9d4435692150fa8ff68e1b1a473d187cc3fd777 |  | MISC |
|  |  | https://git.savannah.gnu.org/cgit/tar.git/commit/?id=d9d4435692150fa8ff68e1b1a473d187cc3fd777 |  | ubuntu |
|  |  | https://savannah.gnu.org/bugs/?59897 |  | nvd |
|  |  | https://bugzilla.redhat.com/show_bug.cgi?id=1917565 |  | nvd |
|  |  | https://git.savannah.gnu.org/cgit/tar.git/commit/?id=d9d4435692150fa8ff68e1b1a473d187cc3fd777 |  | nvd |

</details>

二、漏洞分析结构反馈
 影响性分析说明：
    在tar的src / list.c中发现一个缺陷。此缺陷使攻击者可以将精心制作的输入文件提交给tar，从而导致不受控制的内存消耗。此漏洞带来的最大威胁是对系统可用性的威胁。 
 openEuler评分：
  5.5
 Vector：CVSS：3.0/AV:L/AC:L/PR:N/UI:R/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(1.32):受影响
2.openEuler-20.03-LTS-SP1(1.32):受影响

修复是否涉及abi变化(是/否)：
  1.openEuler-20.03-LTS-SP1(1.32):
2.openEuler-20.03-LTS-SP3(1.32):
3.openEuler-22.03-LTS(1.34):
4.openEuler-22.03-LTS-SP1(1.34):

三、漏洞修复
安全公告链接：https://www.openeuler.org/zh/security/safety-bulletin/detail/?id=openEuler-SA-2021-1173

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