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CVE-2023-7256— Double-free in libpcap before 1.10.5 with remote packet capture support.

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存在资源管理错误漏洞，该漏洞源于sock_initaddress()函数对getaddrinfo()和freeaddrinfo()的调用逻辑不清晰，可能导致同一内存块被多次释放。

CVSS 4.4 · Medium EPSS 0.24% · P16

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2023-7256

Vulnerability Information
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Vulnerability Title
Double-free in libpcap before 1.10.5 with remote packet capture support.
Source: CVE Program / CVE List V5
Vulnerability Description
In affected libpcap versions during the setup of a remote packet capture the internal function sock_initaddress() calls getaddrinfo() and possibly freeaddrinfo(), but does not clearly indicate to the caller function whether freeaddrinfo() still remains to be called after the function returns. This makes it possible in some scenarios that both the function and its caller call freeaddrinfo() for the same allocated memory block. A similar problem was reported in Apple libpcap, to which Apple assigned CVE-2023-40400.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
双重释放
Source: CVE Program / CVE List V5
Vulnerability Title
libpcap 资源管理错误漏洞
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存在资源管理错误漏洞，该漏洞源于sock_initaddress()函数对getaddrinfo()和freeaddrinfo()的调用逻辑不清晰，可能导致同一内存块被多次释放。
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 1.8.x -

II. Public POCs for CVE-2023-7256

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III. Intelligence Information for CVE-2023-7256

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Patches & Fixes for CVE-2023-7256 (2)

IV. Related Vulnerabilities

Same product: libpcap
Same vendor: The Tcpdump Group
Same weakness: CWE-415

V. Comments for CVE-2023-7256

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