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CVE-2019-11477— Integer overflow in TCP_SKB_CB(skb)->tcp_gso_segs

Quick assessment

Affected
Linux Linux kernel
Exploitation
Public or AI PoC available; prioritize validation
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中的网络子系统处理TCP Selective Acknowledgment (SACK)片段的方法存在输入验证错误漏洞。攻击者可利用该漏洞造成拒绝服务。

AI Predicted 7.5 Difficulty: Easy EPSS 98.75% · P100

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth
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I. Basic Information for CVE-2019-11477

Vulnerability Information
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Vulnerability Title
Integer overflow in TCP_SKB_CB(skb)->tcp_gso_segs
Source: CVE Program / CVE List V5
Vulnerability Description
Jonathan Looney discovered that the TCP_SKB_CB(skb)->tcp_gso_segs value was subject to an integer overflow in the Linux kernel when handling TCP Selective Acknowledgments (SACKs). A remote attacker could use this to cause a denial of service. This has been fixed in stable kernel releases 4.4.182, 4.9.182, 4.14.127, 4.19.52, 5.1.11, and is fixed in commit 3b4929f65b0d8249f19a50245cd88ed1a2f78cff.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 输入验证错误漏洞
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中的网络子系统处理TCP Selective Acknowledgment (SACK)片段的方法存在输入验证错误漏洞。攻击者可利用该漏洞造成拒绝服务。
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)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux kernel 4.4 ~ 4.4.182 -

II. Public POCs for CVE-2019-11477

# POC Description Source Link Shenlong Link
1 None https://github.com/sasqwatch/cve-2019-11477-poc POC Details
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III. Intelligence Information for CVE-2019-11477

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Patches & Fixes for CVE-2019-11477 (1)

Vendor Advisories for CVE-2019-11477 (11)

Exploits & Public PoCs for CVE-2019-11477 (1)

Mailing List Discussions for CVE-2019-11477 (6)

Other References for CVE-2019-11477 (8)

Same Patch Batch · Linux · 2019-06-18 · 3 CVEs total

CVE-2019-11478 SACK can cause extensive memory use via fragmented resend queue
CVE-2019-11479 Linux kernel 资源管理错误漏洞

IV. Related Vulnerabilities

Same product: Linux kernel
Same vendor: Linux
Same weakness: CWE-190

V. Comments for CVE-2019-11477

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