high7.5
CVE-2021-41991
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 c…
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Strongswan | Strongswan | from 4.2.10 before 5.9.4 |
| Debian | Debian Linux | Versions 9.0, 10.0, 11.0 |
| Fedoraproject | Fedora | Versions 33, 34, 35 |
| Siemens | Sinema Remote Connect Server | All versions |
| Siemens | Siplus Et 200sp Cp 1542sp-1 Irc Tx Rail Firmware | All versions |
| Siemens | Simatic Cp 1243-1 Firmware | All versions |
| Siemens | Simatic Cp 1242-7 Gprs V2 Firmware | All versions |
| Siemens | Simatic Net Cp 1243-8 Irc Firmware | All versions |
| Siemens | Scalance Sc632-2c Firmware | All versions |
| Siemens | Siplus Et 200sp Cp 1543sp-1 Isec Firmware | All versions |
| Siemens | Cp 1543-1 Firmware | All versions |
| Siemens | Simatic Net Cp 1545-1 Firmware | All versions |
Weakness classification
References
- NVD record
- CVE.org record
- https://cert-portal.siemens.com/productcert/pdf/ssa-539476.pdf
- https://github.com/strongswan/strongswan/releases/tag/5.9.4
- 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://www.debian.org/security/2021/dsa-4989
- https://www.strongswan.org/blog/2021/10/18/strongswan-vulnerability-%28cve-2021-41991%29.html
- https://cert-portal.siemens.com/productcert/pdf/ssa-539476.pdf
- https://github.com/strongswan/strongswan/releases/tag/5.9.4
- 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://www.debian.org/security/2021/dsa-4989
- https://www.strongswan.org/blog/2021/10/18/strongswan-vulnerability-%28cve-2021-41991%29.html