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CVE-2023-25567— GSS-NTLMSSP vulnerable to out-of-bounds read when decoding target information

Quick assessment

Affected
gssapi gss-ntlmssp
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.

GSS-NTLMSSP是gssapi开源的一个实现 NTLM 身份验证的 GSSAPI 库的 mechglue 插件。 GSS-NTLMSSP 1.2.0之前版本存在缓冲区错误漏洞，该漏洞源于未针对可能触发越界读取的两个元素av_pair 的长度进行正确检查 ，解码目标信息时可能导致越界读取，攻击者可以通过“gss_accept_sec_context”主入口点触发该漏洞。

CVSS 7.5 · High EPSS 1.10% · P66

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2023-25567

Vulnerability Information
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Vulnerability Title
GSS-NTLMSSP vulnerable to out-of-bounds read when decoding target information
Source: CVE Program / CVE List V5
Vulnerability Description
GSS-NTLMSSP, a mechglue plugin for the GSSAPI library that implements NTLM authentication, has an out-of-bounds read when decoding target information prior to version 1.2.0. The length of the `av_pair` is not checked properly for two of the elements which can trigger an out-of-bound read. The out-of-bounds read can be triggered via the main `gss_accept_sec_context` entry point and could cause a denial-of-service if the memory is unmapped. The issue is fixed in version 1.2.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
GSS-NTLMSSP 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GSS-NTLMSSP是gssapi开源的一个实现 NTLM 身份验证的 GSSAPI 库的 mechglue 插件。 GSS-NTLMSSP 1.2.0之前版本存在缓冲区错误漏洞，该漏洞源于未针对可能触发越界读取的两个元素av_pair 的长度进行正确检查 ，解码目标信息时可能导致越界读取，攻击者可以通过“gss_accept_sec_context”主入口点触发该漏洞。
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
gssapi gss-ntlmssp < 1.2.0 -

II. Public POCs for CVE-2023-25567

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III. Intelligence Information for CVE-2023-25567

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Vendor Advisories for CVE-2023-25567 (1)

Other References for CVE-2023-25567 (1)

Same Patch Batch · gssapi · 2023-02-14 · 5 CVEs total

CVE-2023-25565 7.5 HIGH GSS-NTLMSSP vulnerable to incorrect free when decoding target information
CVE-2023-25566 7.5 HIGH GSS-NTLMSSP vulnerable to memory leak when parsing usernames
CVE-2023-25564 6.5 MEDIUM GSS-NTLMSSP vulnerable to memory corruption when decoding UTF16 strings
CVE-2023-25563 5.9 MEDIUM GSS-NTLMSSP vulnerable to multiple out-of-bounds reads when decoding NTLM fields

IV. Related Vulnerabilities

Same product: gss-ntlmssp
Same vendor: gssapi
Same weakness: CWE-125