CVE-2020-8013— permissions: chkstat sets unintended setuid/capabilities for mrsh and wodim
Quick assessment
Affected
SUSE SUSE Linux Enterprise Server 12
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
SUSE Linux Enterprise Server是德国SUSE公司的一套企业服务器版Linux操作系统。 SUSE Linux Enterprise Server中的permissions存在后置链接漏洞。该漏洞源于网络系统或产品未正确过滤表示非预期资源的链接或者快捷方式的文件名。攻击者可利用该漏洞访问非法的文件路径。以下产品及版本受到影响：SUSE Linux Enterprise Server 12版本（permissions 2015.09.28.1626-17.27.1之前版本），SUSE
Possible ATT&CK Techniques 1 AI
T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2020-8013
Vulnerability Information
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Vulnerability Title
permissions: chkstat sets unintended setuid/capabilities for mrsh and wodim
Source: CVE Program / CVE List V5
Vulnerability Description
A UNIX Symbolic Link (Symlink) Following vulnerability in chkstat of SUSE Linux Enterprise Server 12, SUSE Linux Enterprise Server 15, SUSE Linux Enterprise Server 11 set permissions intended for specific binaries on other binaries because it erroneously followed symlinks. The symlinks can't be controlled by attackers on default systems, so exploitation is difficult. This issue affects: SUSE Linux Enterprise Server 12 permissions versions prior to 2015.09.28.1626-17.27.1. SUSE Linux Enterprise Server 15 permissions versions prior to 20181116-9.23.1. SUSE Linux Enterprise Server 11 permissions versions prior to 2013.1.7-0.6.12.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在文件访问前对链接解析不恰当(链接跟随)
Source: CVE Program / CVE List V5
Vulnerability Title
SUSE Linux Enterprise Server 后置链接漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SUSE Linux Enterprise Server是德国SUSE公司的一套企业服务器版Linux操作系统。 SUSE Linux Enterprise Server中的permissions存在后置链接漏洞。该漏洞源于网络系统或产品未正确过滤表示非预期资源的链接或者快捷方式的文件名。攻击者可利用该漏洞访问非法的文件路径。以下产品及版本受到影响：SUSE Linux Enterprise Server 12版本（permissions 2015.09.28.1626-17.27.1之前版本），SUSE
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| SUSE | SUSE Linux Enterprise Server 12 | permissions ~ 2015.09.28.1626-17.27.1 | - |
|
| SUSE | SUSE Linux Enterprise Server 15 | permissions ~ 20181116-9.23.1 | - |
|
| SUSE | SUSE Linux Enterprise Server 11 | permissions ~ 2013.1.7-0.6.12.1 | - |
|
II. Public POCs for CVE-2020-8013
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2020-8013 (1)
-
https://bugzilla.suse.com/show_bug.cgi?id=1163922 x_refsource_CONFIRM
Mailing List Discussions for CVE-2020-8013 (1)
-
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00010.html vendor-advisory x_refsource_SUSE
Same Patch Batch · SUSE · 2020-03-02 · 5 CVEs total
| CVE-2019-18897 | 8.4 HIGH | Local privilege escalation from user salt to root |
| CVE-2019-18902 | 7.5 HIGH | wicked: Use-after-free when receiving invalid DHCP6 client options |
| CVE-2019-18903 | 7.5 HIGH | wicked: Use-after-free when receiving invalid DHCP6 IA_PD option |
| CVE-2019-18901 | 5.1 MEDIUM | mysql-systemd-helper allows setting 640 permissions of arbitrary files |
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V. Comments for CVE-2020-8013
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