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CVE-2025-11961— OOBR and OOBW in pcap_ether_aton() in libpcap

Quick assessment

Affected
The Tcpdump Group libpcap
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.

libpcap是Tcpdump团队的一款用于网络流量捕获的便携式C/C ++库。 libpcap存在安全漏洞，该漏洞源于pcap_ether_aton函数对输入格式验证不足，可能导致越界读取和写入。

CVSS 1.9 · Low EPSS 0.12% · P2

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-11961

Vulnerability Information
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Vulnerability Title
OOBR and OOBW in pcap_ether_aton() in libpcap
Source: CVE Program / CVE List V5
Vulnerability Description
pcap_ether_aton() is an auxiliary function in libpcap, it takes a string argument and returns a fixed-size allocated buffer. The string argument must be a well-formed MAC-48 address in one of the supported formats, but this requirement has been poorly documented. If an application calls the function with an argument that deviates from the expected format, the function can read data beyond the end of the provided string and write data beyond the end of the allocated buffer.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
缓冲区上溢读取
Source: CVE Program / CVE List V5
Vulnerability Title
libpcap 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
libpcap是Tcpdump团队的一款用于网络流量捕获的便携式C/C ++库。 libpcap存在安全漏洞，该漏洞源于pcap_ether_aton函数对输入格式验证不足，可能导致越界读取和写入。
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
The Tcpdump Group libpcap 0 ~ 1.10.6 -

II. Public POCs for CVE-2025-11961

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III. Intelligence Information for CVE-2025-11961

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Patches & Fixes for CVE-2025-11961 (1)

IV. Related Vulnerabilities

Same product: libpcap
Same vendor: The Tcpdump Group
Same weakness: CWE-126

V. Comments for CVE-2025-11961

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