CVE-2021-41991
At a glance
- Source
- NVD
- EPSS
- EPSS 5.30 % · percentile 93 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- mitre
- NVD status
- Modified
Description
The in-memory certificate cache in strongSwan before 5.9.4 has a remote integer overflow upon receiving many requests with different certificates to fill the cache and later trigger the replacement of cache entries. The code attempts to select a less-often-used cache entry by means of a random number generator, but this is not done correctly. Remote code execution might be a slight possibility.
Weaknesses (CWE)
- CWE-190 — Integer Overflow or Wraparound
References
- https://github.com/strongswan/strongswan/releases/tag/5.9.4
- https://www.strongswan.org/blog/2021/10/18/strongswan-vulnerability-%28cve-2021-41991%29.html
- https://www.debian.org/security/2021/dsa-4989
- https://lists.debian.org/debian-lts-announce/2021/10/msg00014.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5FJSATD2R2XHTG4P63GCMQ2N7EWKMME5/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WQSQ3BEC22NF4NCDZVCT4P3Q2ZIAJXGJ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y3TQ32JLJOBJDB2EJKSX2PBPB5NFG2D4/
- https://cert-portal.siemens.com/productcert/pdf/ssa-539476.pdf
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
| CVSS 2.0 | MEDIUM 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2021-28981
- GCVE · GCVE-0-2021-41991
CERT-FR advisories
- CERTFR-2023-AVI-0338 — Multiples vulnérabilités dans les produits Belden · cert.ssi.gouv.fr
- CERTFR-2022-AVI-124 — Multiples vulnérabilités dans les produits Siemens · cert.ssi.gouv.fr
- CERTFR-2021-AVI-928 — Multiples vulnérabilités dans les produits Stormshield · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*≥ 4.2.10 < 5.9.4cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*cpe:2.3:a:siemens:sinema_remote_connect_server:-:*:*:*:*:*:*:*cpe:2.3:o:siemens:siplus_et_200sp_cp_1542sp-1_irc_tx_rail_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:siemens:simatic_cp_1243-1_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:siemens:simatic_cp_1242-7_gprs_v2_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:siemens:simatic_net_cp_1243-8_irc_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:siemens:scalance_sc632-2c_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:siemens:siplus_et_200sp_cp_1543sp-1_isec_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:siemens:cp_1543-1_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:siemens:simatic_net_cp_1545-1_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:siemens:simatic_cp_1543sp-1_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:siemens:simatic_net_cp1243-7_lte_eu_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:siemens:simatic_cp_1243-7_lte\/us_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:siemens:simatic_cp_1542sp-1_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:siemens:scalance_sc636-2c_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:siemens:simatic_cp_1542sp-1_irc_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:siemens:scalance_sc642-2c_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:siemens:scalance_sc646-2c_firmware:*:*:*:*:*:*:*:*< 2.3cpe:2.3:o:siemens:scalance_sc622-2c_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:siemens:siplus_s7-1200_cp_1243-1_rail_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:siemens:siplus_s7-1200_cp_1243-1_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:siemens:siplus_net_cp_1543-1_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:siemens:siplus_et_200sp_cp_1543sp-1_isec_tx_rail_firmware:-:*:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| affected n/a |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |