CVE-2024-8006: NULL pointer dereference in libpcap before 1.10.5 with remote packet capture support
First published: Fri Aug 30 2024(Updated: )
Remote packet capture support is disabled by default in libpcap. When a user builds libpcap with remote packet capture support enabled, one of the functions that become available is pcap_findalldevs_ex(). One of the function arguments can be a filesystem path, which normally means a directory with input data files. When the specified path cannot be used as a directory, the function receives NULL from opendir(), but does not check the return value and passes the NULL value to readdir(), which causes a NULL pointer derefence.
Credit: security@tcpdump.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Libpcap | <1.10.5 |
Remedy
Upgrade to libpcap 1.10.5.
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2024-8006?
CVE-2024-8006 has a moderate severity level due to the potential risk associated with enabled remote packet capture functionality.
How do I fix CVE-2024-8006?
To fix CVE-2024-8006, ensure that remote packet capture support is disabled in libpcap unless explicitly needed.
Which versions of libpcap are affected by CVE-2024-8006?
Libpcap versions prior to 1.10.5 are affected by CVE-2024-8006 if remote packet capture support is enabled.
What is the exploit for CVE-2024-8006?
CVE-2024-8006 can be exploited when a user provides a malicious filesystem path to the pcap_findalldevs_ex() function.
Is remote packet capture support enabled by default in libpcap?
No, remote packet capture support is disabled by default in libpcap.
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