CVE-2021-41991 | Severity.io

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.

Related CPE's

Vulnerable

o

debian

debian_linux

3

o

fedoraproject

fedora

3

sinema_remote_connect_server

Vulnerable

siplus_et_200sp_cp_1542sp-1_irc_tx_rail_firmware

Vulnerable

siplus_et_200sp_cp_1542sp-1_irc_tx_rail

simatic_cp_1243-1_firmware

Vulnerable

simatic_cp_1243-1

simatic_cp_1242-7_gprs_v2_firmware

Vulnerable

simatic_cp_1242-7_gprs_v2

simatic_net_cp_1243-8_irc_firmware

Vulnerable

simatic_net_cp_1243-8_irc

scalance_sc632-2c_firmware

Vulnerable

scalance_sc632-2c

siplus_et_200sp_cp_1543sp-1_isec_firmware

Vulnerable

siplus_et_200sp_cp_1543sp-1_isec

cp_1543-1_firmware

Vulnerable

simatic_net_cp_1545-1_firmware

Vulnerable

simatic_net_cp_1545-1

simatic_cp_1543sp-1_firmware

Vulnerable

simatic_cp_1543sp-1

simatic_net_cp1243-7_lte_eu_firmware

Vulnerable

simatic_net_cp1243-7_lte_eu

simatic_cp_1243-7_lte\/us_firmware

Vulnerable

simatic_cp_1243-7_lte\/us

simatic_cp_1542sp-1_firmware

Vulnerable

simatic_cp_1542sp-1

scalance_sc636-2c_firmware

Vulnerable

scalance_sc636-2c

simatic_cp_1542sp-1_irc_firmware

Vulnerable

simatic_cp_1542sp-1_irc

scalance_sc642-2c_firmware

Vulnerable

scalance_sc642-2c

scalance_sc646-2c_firmware

Vulnerable

scalance_sc646-2c

scalance_sc622-2c_firmware

Vulnerable

scalance_sc622-2c

siplus_s7-1200_cp_1243-1_rail_firmware

Vulnerable

siplus_s7-1200_cp_1243-1_rail

siplus_s7-1200_cp_1243-1_firmware

Vulnerable

siplus_s7-1200_cp_1243-1

siplus_net_cp_1543-1_firmware

Vulnerable

siplus_net_cp_1543-1

siplus_et_200sp_cp_1543sp-1_isec_tx_rail_firmware

Vulnerable

siplus_et_200sp_cp_1543sp-1_isec_tx_rail

References

https://cert-portal.siemens.com/productcert/pdf/ssa-539476.pdf

PatchThird Party Advisory

https://github.com/strongswan/strongswan/releases/tag/5.9.4

Third Party Advisory

https://lists.debian.org/debian-lts-announce/2021/10/msg00014.html

Mailing ListThird 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://www.strongswan.org/blog/2021/10/18/strongswan-vulnerability-%28cve-2021-41991%29.html

https://cert-portal.siemens.com/productcert/pdf/ssa-539476.pdf

PatchThird Party Advisory

https://github.com/strongswan/strongswan/releases/tag/5.9.4

Third Party Advisory

https://lists.debian.org/debian-lts-announce/2021/10/msg00014.html

Mailing ListThird 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://www.strongswan.org/blog/2021/10/18/strongswan-vulnerability-%28cve-2021-41991%29.html

Weaknesses

[email protected]

Primary

CWE-190

CVSS impact metrics

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

7.5 · High

Information

Source identifier

[email protected]

Vulnerability status

Modified

Published

2021-10-18T12:15:10.333Z

4 years ago

Last modified

2024-11-21T05:27:02.090Z

1 year ago