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CVE-2025-62291

In the eap-mschapv2 plugin (client-side) in strongSwan before 6.0.3, a malicious EAP-MSCHAPv2 server can send a crafted message of size 6 through 8, and cause an integer underflow that potentially results in a heap-based buffer overflow.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:ef668c3cedd3e259a50418d6dc66619d9ba2966ae47ee47b0a8dfc6ebafe9a7d
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","product":"strongSwan","vendor":"strongSwan","versions":[{"lessThan":"6.0.3","status":"affected","version":"4.2.12","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:7e0a9d35ec4bfc6297e450ef2c20c8bed420be995f4dc23476ee77c9e348ef6f · sha256:0846e68e9cdafc56… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":8.1,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:7e0a9d35ec4bfc6297e450ef2c20c8bed420be995f4dc23476ee77c9e348ef6f · sha256:0846e68e9cdafc56… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-191","description":"CWE-191 Integer Underflow (Wrap or Wraparound)","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:7e0a9d35ec4bfc6297e450ef2c20c8bed420be995f4dc23476ee77c9e348ef6f · sha256:0846e68e9cdafc56… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"url":"https://github.com/strongswan/strongswan/commits/master/src/libcharon/plugins/eap_mschapv2"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7e0a9d35ec4bfc6297e450ef2c20c8bed420be995f4dc23476ee77c9e348ef6f · sha256:0846e68e9cdafc56… · /containers/cna/references/1
{"url":"https://github.com/strongswan/strongswan/releases"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7e0a9d35ec4bfc6297e450ef2c20c8bed420be995f4dc23476ee77c9e348ef6f · sha256:0846e68e9cdafc56… · /containers/cna/references/0
{"url":"https://lists.debian.org/debian-lts-announce/2025/11/msg00002.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7e0a9d35ec4bfc6297e450ef2c20c8bed420be995f4dc23476ee77c9e348ef6f · sha256:0846e68e9cdafc56… · /containers/adp/1/references/0
{"url":"https://www.strongswan.org/blog/2025/10/27/strongswan-vulnerability-%28cve-2025-62291%29.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7e0a9d35ec4bfc6297e450ef2c20c8bed420be995f4dc23476ee77c9e348ef6f · sha256:0846e68e9cdafc56… · /containers/cna/references/2

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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