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CVE-2023-39192— Kernel: netfilter: xtables out-of-bounds read in u32_match_it()

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 8
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.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于未验证xt_u32结构中的字段。攻击者利用该漏洞导致系统崩溃或信息泄露。

CVSS 6.7 · Medium EPSS 0.40% · P33
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I. Basic Information for CVE-2023-39192

Vulnerability Information
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Vulnerability Title
Kernel: netfilter: xtables out-of-bounds read in u32_match_it()
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in the Netfilter subsystem in the Linux kernel. The xt_u32 module did not validate the fields in the xt_u32 structure. This flaw allows a local privileged attacker to trigger an out-of-bounds read by setting the size fields with a value beyond the array boundaries, leading to a crash or information disclosure.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于未验证xt_u32结构中的字段。攻击者利用该漏洞导致系统崩溃或信息泄露。
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
Red Hat Red Hat Enterprise Linux 8 0:4.18.0-553.rt7.342.el8_10 ~ * cpe:/a:redhat:enterprise_linux:8::realtime
Red Hat Red Hat Enterprise Linux 8 0:4.18.0-553.el8_10 ~ * cpe:/a:redhat:enterprise_linux:8::crb
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9

II. Public POCs for CVE-2023-39192

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III. Intelligence Information for CVE-2023-39192

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Vendor Advisories for CVE-2023-39192 (5)

Mailing List Discussions for CVE-2023-39192 (1)

Same Patch Batch · Red Hat · 2023-10-09 · 4 CVEs total

CVE-2023-39193 6.1 MEDIUM Kernel: netfilter: xtables sctp out-of-bounds read in match_flags()
CVE-2023-39189 5.1 MEDIUM Kernel: netfilter: nftables out-of-bounds read in nf_osf_match_one()
CVE-2023-39194 3.2 LOW Kernel: xfrm: out-of-bounds read in __xfrm_state_filter_match()

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 8
Same vendor: Red Hat
Same weakness: CWE-125

V. Comments for CVE-2023-39192

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