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FreeBSD: VID-A005AEA9-47BB-11EE-8E38-002590C1F29C (CVE-2022-23093): FreeBSD -- Stack overflow in ping(8)

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FreeBSD: VID-A005AEA9-47BB-11EE-8E38-002590C1F29C (CVE-2022-23093): FreeBSD -- Stack overflow in ping(8)



Details for this vulnerability have not been published by NIST at this point. Descriptions from software vendor advisories for this issue are provided below.

From VID-A005AEA9-47BB-11EE-8E38-002590C1F29C:

Problem Description:

ping reads raw IP packets from the network to process responses in

the pr_pack() function. As part of processing a response ping has to

reconstruct the IP header, the ICMP header and if present a "quoted

packet," which represents the packet that generated an ICMP error.

The quoted packet again has an IP header and an ICMP header.

The pr_pack() copies received IP and ICMP headers into stack buffers

for further processing. In so doing, it fails to take into account the

possible presence of IP option headers following the IP header in either

the response or the quoted packet. When IP options are present,

pr_pack() overflows the destination buffer by up to 40 bytes.


The memory safety bugs described above can be triggered by a remote

host, causing the ping program to crash.

The ping process runs in a capability mode sandbox on all affected

versions of FreeBSD and is thus very constrained in how it can interact

with the rest of the system at the point where the bug can occur.


  • freebsd-upgrade-base-12_3-release-p10
  • freebsd-upgrade-base-13_1-release-p5

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