[SECURITY] [DLA 2788-1] strongswan security update

2021-10-1922:36:40

lists.debian.org

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

0.061 Low

EPSS

Percentile

93.4%

JSON

Debian LTS Advisory DLA-2788-1 [email protected]
https://www.debian.org/lts/security/ Thorsten Alteholz
October 20, 2021 https://wiki.debian.org/LTS

Package : strongswan
Version : 5.5.1-4+deb9u5
CVE ID : CVE-2021-41991

Researchers at the United States of America National Security Agency (NSA)
identified a denial of services vulnerability in strongSwan, an
IKE/IPsec suite.

Once the in-memory certificate cache is full it tries to randomly replace
lesser used entries. Depending on the generated random value, this could
lead to an integer overflow that results in a double-dereference and a
call using out-of-bounds memory that most likely leads to a segmentation
fault.

Remote code execution can't be ruled out completely, but attackers have
no control over the dereferenced memory, so it seems unlikely at this
point.

For Debian 9 stretch, this problem has been fixed in version
5.5.1-4+deb9u5.

We recommend that you upgrade your strongswan packages.

For the detailed security status of strongswan please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/strongswan

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS

OSVersionArchitecturePackageVersionFilename
Debian10mipselstrongswan-charon-dbgsym< 5.7.2-1+deb10u1strongswan-charon-dbgsym_5.7.2-1+deb10u1_mipsel.deb
Debian9armhfstrongswan-scepclient< 5.5.1-4+deb9u5strongswan-scepclient_5.5.1-4+deb9u5_armhf.deb
Debian10s390xlibstrongswan< 5.7.2-1+deb10u1libstrongswan_5.7.2-1+deb10u1_s390x.deb
Debian11armhfstrongswan-swanctl< 5.9.1-1+deb11u1strongswan-swanctl_5.9.1-1+deb11u1_armhf.deb
Debian10amd64charon-cmd< 5.7.2-1+deb10u1charon-cmd_5.7.2-1+deb10u1_amd64.deb
Debian10arm64strongswan-nm-dbgsym< 5.7.2-1+deb10u1strongswan-nm-dbgsym_5.7.2-1+deb10u1_arm64.deb
Debian10arm64charon-cmd< 5.7.2-1+deb10u1charon-cmd_5.7.2-1+deb10u1_arm64.deb
Debian11mipselstrongswan-swanctl< 5.9.1-1+deb11u1strongswan-swanctl_5.9.1-1+deb11u1_mipsel.deb
Debian10armhfstrongswan-starter-dbgsym< 5.7.2-1+deb10u1strongswan-starter-dbgsym_5.7.2-1+deb10u1_armhf.deb
Debian10mipslibstrongswan-standard-plugins< 5.7.2-1+deb10u1libstrongswan-standard-plugins_5.7.2-1+deb10u1_mips.deb

OS	Version	Architecture	Package	Version	Filename
Debian	10	mipsel	strongswan-charon-dbgsym	< 5.7.2-1+deb10u1	strongswan-charon-dbgsym_5.7.2-1+deb10u1_mipsel.deb
Debian	9	armhf	strongswan-scepclient	< 5.5.1-4+deb9u5	strongswan-scepclient_5.5.1-4+deb9u5_armhf.deb
Debian	10	s390x	libstrongswan	< 5.7.2-1+deb10u1	libstrongswan_5.7.2-1+deb10u1_s390x.deb
Debian	11	armhf	strongswan-swanctl	< 5.9.1-1+deb11u1	strongswan-swanctl_5.9.1-1+deb11u1_armhf.deb
Debian	10	amd64	charon-cmd	< 5.7.2-1+deb10u1	charon-cmd_5.7.2-1+deb10u1_amd64.deb
Debian	10	arm64	strongswan-nm-dbgsym	< 5.7.2-1+deb10u1	strongswan-nm-dbgsym_5.7.2-1+deb10u1_arm64.deb
Debian	10	arm64	charon-cmd	< 5.7.2-1+deb10u1	charon-cmd_5.7.2-1+deb10u1_arm64.deb
Debian	11	mipsel	strongswan-swanctl	< 5.9.1-1+deb11u1	strongswan-swanctl_5.9.1-1+deb11u1_mipsel.deb
Debian	10	armhf	strongswan-starter-dbgsym	< 5.7.2-1+deb10u1	strongswan-starter-dbgsym_5.7.2-1+deb10u1_armhf.deb
Debian	10	mips	libstrongswan-standard-plugins	< 5.7.2-1+deb10u1	libstrongswan-standard-plugins_5.7.2-1+deb10u1_mips.deb