CVE-2022-48711 tipc: improve size validations for received domain records

2024-06-2011:13:06

Linux

github.com

linux kernel

vulnerability

cve-2022-48711

size validations

domain records

network topology

stack overflow

message data length

bit overflow

sk buffers

AI Score

6.8

Confidence

Low

EPSS

0.009

Percentile

83.4%

SSVC

Exploitation

none

Automatable

Technical Impact

partial

JSON

In the Linux kernel, the following vulnerability has been resolved:

tipc: improve size validations for received domain records

The function tipc_mon_rcv() allows a node to receive and process
domain_record structs from peer nodes to track their views of the
network topology.

This patch verifies that the number of members in a received domain
record does not exceed the limit defined by MAX_MON_DOMAIN, something
that may otherwise lead to a stack overflow.

tipc_mon_rcv() is called from the function tipc_link_proto_rcv(), where
we are reading a 32 bit message data length field into a uint16. To
avert any risk of bit overflow, we add an extra sanity check for this in
that function. We cannot see that happen with the current code, but
future designers being unaware of this risk, may introduce it by
allowing delivery of very large (> 64k) sk buffers from the bearer
layer. This potential problem was identified by Eric Dumazet.

This fixes CVE-2022-0435

CNA Affected

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    "vendor": "Linux",
    "product": "Linux",
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        "version": "35c55c9877f8",
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        "versionType": "git"
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        "version": "35c55c9877f8",
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      }
    ],
    "programFiles": [
      "net/tipc/link.c",
      "net/tipc/monitor.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
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        "status": "unaffected",
        "version": "4.9.301",
        "versionType": "custom",
        "lessThanOrEqual": "4.9.*"
      },
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        "status": "unaffected",
        "version": "4.14.266",
        "versionType": "custom",
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      },
      {
        "status": "unaffected",
        "version": "4.19.229",
        "versionType": "custom",
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      },
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        "status": "unaffected",
        "version": "5.4.179",
        "versionType": "custom",
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      },
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        "status": "unaffected",
        "version": "5.10.100",
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      },
      {
        "status": "unaffected",
        "version": "5.15.23",
        "versionType": "custom",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "5.16.9",
        "versionType": "custom",
        "lessThanOrEqual": "5.16.*"
      },
      {
        "status": "unaffected",
        "version": "5.17",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/tipc/link.c",
      "net/tipc/monitor.c"
    ],
    "defaultStatus": "affected"
  }
]