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CVE-2023-52628— netfilter: nftables: exthdr: fix 4-byte stack OOB write

Quick assessment

Affected
Linux Linux
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netfilter: nftables: exthdr中包含堆栈溢出写入。

CVSS 7.8 · High EPSS 0.66% · P50

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux 49499c3e6e18b7677a63316f3ff54a16533dc28f< 28a97c43c9e32f437ebb8d6126f9bb7f3ca9521a affected
49499c3e6e18b7677a63316f3ff54a16533dc28f< cf39c4f77a773a547ac2bcf30ecdd303bb0c80cb affected
49499c3e6e18b7677a63316f3ff54a16533dc28f< a7d86a77c33ba1c357a7504341172cc1507f0698 affected
49499c3e6e18b7677a63316f3ff54a16533dc28f< 1ad7b189cc1411048434e8595ffcbe7873b71082 affected
49499c3e6e18b7677a63316f3ff54a16533dc28f< d9ebfc0f21377690837ebbd119e679243e0099cc affected
49499c3e6e18b7677a63316f3ff54a16533dc28f< c8f292322ff16b9a2272a67de396c09a50e09dce affected
49499c3e6e18b7677a63316f3ff54a16533dc28f< fd94d9dadee58e09b49075240fe83423eb1dcd36 affected
4.1 affected
… +8 more rows
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I. Basic Information for CVE-2023-52628

Vulnerability Information
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Vulnerability Title
netfilter: nftables: exthdr: fix 4-byte stack OOB write
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nftables: exthdr: fix 4-byte stack OOB write If priv->len is a multiple of 4, then dst[len / 4] can write past the destination array which leads to stack corruption. This construct is necessary to clean the remainder of the register in case ->len is NOT a multiple of the register size, so make it conditional just like nft_payload.c does. The bug was added in 4.1 cycle and then copied/inherited when tcp/sctp and ip option support was added. Bug reported by Zero Day Initiative project (ZDI-CAN-21950, ZDI-CAN-21951, ZDI-CAN-21961).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
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netfilter: nftables: exthdr中包含堆栈溢出写入。
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
Linux Linux 49499c3e6e18b7677a63316f3ff54a16533dc28f ~ 28a97c43c9e32f437ebb8d6126f9bb7f3ca9521a -
Linux Linux 4.1 -

II. Public POCs for CVE-2023-52628

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III. Intelligence Information for CVE-2023-52628

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Mailing List Discussions for CVE-2023-52628 (1)

Other References for CVE-2023-52628 (6)

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-52628

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