7.5

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 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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Strongswan ≫ Strongswan Version >= 4.2.10 < 5.9.4
Debian ≫ Debian Linux Version 9.0
Debian ≫ Debian Linux Version 10.0
Debian ≫ Debian Linux Version 11.0
Fedoraproject ≫ Fedora Version 33
Fedoraproject ≫ Fedora Version 34
Fedoraproject ≫ Fedora Version 35
Siemens ≫ Simatic Cp 1243-1 Firmware Version -
   Siemens ≫ Simatic Cp 1243-1 Version -
Siemens ≫ Scalance Sc632-2c Firmware Version -
   Siemens ≫ Scalance Sc632-2c Version -
Siemens ≫ Cp 1543-1 Firmware Version -
   Siemens ≫ Cp 1543-1 Version -
Siemens ≫ Scalance Sc636-2c Firmware Version -
   Siemens ≫ Scalance Sc636-2c Version -
Siemens ≫ Scalance Sc642-2c Firmware Version -
   Siemens ≫ Scalance Sc642-2c Version -
Siemens ≫ Scalance Sc646-2c Firmware Version < 2.3
   Siemens ≫ Scalance Sc646-2c Version -
Siemens ≫ Scalance Sc622-2c Firmware Version -
   Siemens ≫ Scalance Sc622-2c Version -
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 5.2% 0.917
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NIST 5 10 2.9
AV:N/AC:L/Au:N/C:N/I:N/A:P
CWE-190 Integer Overflow or Wraparound

The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

https://cert-portal.siemens.com/productcert/pdf/ssa-539476.pdf
Patch
Third Party Advisory
https://github.com/strongswan/strongswan/releases/tag/5.9.4
Third Party Advisory
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
Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/10/msg00014.html
Third Party Advisory
Mailing List
https://www.strongswan.org/blog/2021/10/18/strongswan-vulnerability-%28cve-2021-41991%29.html