- Description
- With NLnet Labs Unbound up to and including version 1.25.1, applications using libunbound and configured with 'unwanted-reply-threshold', could eventually be abruptly terminated if the threshold is reached and libunbound needs to call 'libworker_alloc_cleanup' since the function is absent from the function call allow list. When an application using libunbound sets 'unwanted-reply-threshold' to any non-zero value and the iterator queries an authoritative that replies with enough wrong-transaction-ID UDP datagrams to cross the threshold, the 'libworker_alloc_cleanup' will eventually be called. Since the function is absent from the function call allow list, this leads to a fatal exit of libunbound and eventual termination of the embedding application.Unbound itself is not affected since its relevant function 'worker_alloc_cleanup' is registed in the allow list and proceeds to perform the documented cache flush.
- Source
- sep@nlnetlabs.nl
- NVD status
- Analyzed
- Products
- unbound
CVSS 3.1
- Type
- Secondary
- Base score
- 5.9
- Impact score
- 3.6
- Exploitability score
- 2.2
- Vector string
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- Severity
- MEDIUM
- sep@nlnetlabs.nl
- CWE-754
- Hype score
- Not currently trending
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"matchCriteriaId": "9C01A425-F6D7-49A7-A72D-BF2159564DB6",
"versionEndExcluding": "1.25.2",
"vulnerable": true
}
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"negate": false,
"operator": "OR"
}
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}
]