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CVE-2018-17953— pam_access does not handle netmask matches correctly

Quick assessment

Affected
SUSE pam
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.

Micro Focus openSUSE Leap和SUSE Linux Enterprise都是英国Micro Focus公司的不同版本的Linux操作系统。PAM是其中的一个可插拔认证模块。 Micro Focus openSUSE Leap 15.0版本和SUSE Linux Enterprise 15版本中的PAM 1.3.0版本存在安全漏洞，该漏洞源于pam_access.so文件没有正确地处理对IP地址和子网络的过滤。攻击者可借助不正确的变量利用该漏洞绕过访问控制。

AI Predicted 7.5 Difficulty: Moderate EPSS 1.34% · P70

Possible ATT&CK Techniques 1 AI

T1138
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I. Basic Information for CVE-2018-17953

Vulnerability Information
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Vulnerability Title
pam_access does not handle netmask matches correctly
Source: CVE Program / CVE List V5
Vulnerability Description
A incorrect variable in a SUSE specific patch for pam_access rule matching in PAM 1.3.0 in openSUSE Leap 15.0 and SUSE Linux Enterprise 15 could lead to pam_access rules not being applied (fail open).
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Micro Focus openSUSE Leap和SUSE Linux Enterprise PAM 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Micro Focus openSUSE Leap和SUSE Linux Enterprise都是英国Micro Focus公司的不同版本的Linux操作系统。PAM是其中的一个可插拔认证模块。 Micro Focus openSUSE Leap 15.0版本和SUSE Linux Enterprise 15版本中的PAM 1.3.0版本存在安全漏洞，该漏洞源于pam_access.so文件没有正确地处理对IP地址和子网络的过滤。攻击者可借助不正确的变量利用该漏洞绕过访问控制。
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 pam 1.3.0 ~ 1.3.0 before 2018-11-30 -

II. Public POCs for CVE-2018-17953

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III. Intelligence Information for CVE-2018-17953

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Vendor Advisories for CVE-2018-17953 (1)

IV. Related Vulnerabilities

Same product: pam
Same vendor: SUSE
Same weakness: CWE-284

V. Comments for CVE-2018-17953

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