var-202110-1670
Vulnerability from variot
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. strongSwan Exists in an integer overflow vulnerability.Denial of service (DoS) It may be put into a state. ========================================================================== Ubuntu Security Notice USN-5111-1 October 19, 2021
strongswan vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 21.10
- Ubuntu 21.04
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
Summary:
Several security issues were fixed in strongSwan.
Software Description: - strongswan: IPsec VPN solution
Details:
It was discovered that strongSwan incorrectly handled certain RSASSA-PSS signatures. A remote attacker could use this issue to cause strongSwan to crash, resulting in a denial of service. (CVE-2021-41990)
It was discovered that strongSwan incorrectly handled replacing certificates in the cache. A remote attacker could use this issue to cause strongSwan to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2021-41991)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 21.10: libstrongswan 5.9.1-1ubuntu3.1 strongswan 5.9.1-1ubuntu3.1
Ubuntu 21.04: libstrongswan 5.9.1-1ubuntu1.2 strongswan 5.9.1-1ubuntu1.2
Ubuntu 20.04 LTS: libstrongswan 5.8.2-1ubuntu3.3 strongswan 5.8.2-1ubuntu3.3
Ubuntu 18.04 LTS: libstrongswan 5.6.2-1ubuntu2.7 strongswan 5.6.2-1ubuntu2.7
In general, a standard system update will make all the necessary changes.
References: https://ubuntu.com/security/notices/USN-5111-1 CVE-2021-41990, CVE-2021-41991
Package Information: https://launchpad.net/ubuntu/+source/strongswan/5.9.1-1ubuntu3.1 https://launchpad.net/ubuntu/+source/strongswan/5.9.1-1ubuntu1.2 https://launchpad.net/ubuntu/+source/strongswan/5.8.2-1ubuntu3.3 https://launchpad.net/ubuntu/+source/strongswan/5.6.2-1ubuntu2.7 . -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512
Debian Security Advisory DSA-4989-1 security@debian.org https://www.debian.org/security/ Yves-Alexis Perez October 18, 2021 https://www.debian.org/security/faq
Package : strongswan CVE ID : CVE-2021-41990 CVE-2021-41991
Researchers at the United States of America National Security Agency (NSA) identified two denial of services vulnerability in strongSwan, an IKE/IPsec suite.
CVE-2021-41990
RSASSA-PSS signatures whose parameters define a very high salt length can
trigger an integer overflow that can lead to a segmentation fault.
Generating a signature that bypasses the padding check to trigger the crash
requires access to the private key that signed the certificate. However,
the certificate does not have to be trusted. Because the gmp and the
openssl plugins both check if a parsed certificate is self-signed (and the
signature is valid), this can e.g. be triggered by an unrelated
self-signed CA certificate sent by an initiator. 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 the oldstable distribution (buster), these problems have been fixed in version 5.7.2-1+deb10u1.
For the stable distribution (bullseye), these problems have been fixed in version 5.9.1-1+deb11u1.
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 Security Advisories, how to apply these updates to your system and frequently asked questions can be found at: https://www.debian.org/security/
Mailing list: debian-security-announce@lists.debian.org -----BEGIN PGP SIGNATURE-----
iQEzBAEBCgAdFiEE8vi34Qgfo83x35gF3rYcyPpXRFsFAmFtyAUACgkQ3rYcyPpX RFudiwf+NNcRRRJychLI5ycMKVxkr2tEAJDeVZjv966YBM1tXnCtROydXf5Zip2M dn/EYO71uuT5FKhs8tJyx5iv2bFcrvyqQQo6DFQvXZHR0+9U+MHcR9qB7JJDM4nK +JXOEmAv3akCFhiP6jMx5B6jRWR1e4MOwxmgrgGu/nwy2cYBQPI43qPTrXi3Fcnv eSgeyLqyZNLmaGmj8jQfTnc8bdVF5xAs6mHhVqNJxQCdouG9b4/S6AxJsl3IMxyF WZhtCNUvhHH8wz0lZVElR3Qs6fUu0phKdlT9kBv/o6fP3ceiYOCEh8SqBgYU3hQL xyB0uP4EcSR70TvKZMB2jV/tGG1A8w== =/Xvi -----END PGP SIGNATURE----- . - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 202405-08
https://security.gentoo.org/
Severity: Normal Title: strongSwan: Multiple Vulnerabilities Date: May 04, 2024 Bugs: #818841, #832460, #878887, #899964 ID: 202405-08
Synopsis
Multiple vulnerabilities have been discovered in strongSwan, the worst of which could possibly lead to remote code execution.
Background
strongSwan is an IPSec implementation for Linux.
Affected packages
Package Vulnerable Unaffected
net-vpn/strongswan < 5.9.10 >= 5.9.10
Description
Multiple vulnerabilities have been discovered in strongSwan. Please review the CVE identifiers referenced below for details.
Impact
Please review the referenced CVE identifiers for details.
Workaround
There is no known workaround at this time.
Resolution
All strongSwan users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=net-vpn/strongswan-5.9.10"
References
[ 1 ] CVE-2021-41991 https://nvd.nist.gov/vuln/detail/CVE-2021-41991 [ 2 ] CVE-2021-45079 https://nvd.nist.gov/vuln/detail/CVE-2021-45079 [ 3 ] CVE-2022-40617 https://nvd.nist.gov/vuln/detail/CVE-2022-40617 [ 4 ] CVE-2023-26463 https://nvd.nist.gov/vuln/detail/CVE-2023-26463
Availability
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
https://security.gentoo.org/glsa/202405-08
Concerns?
Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.
License
Copyright 2024 Gentoo Foundation, Inc; referenced text belongs to its owner(s).
The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.
https://creativecommons.org/licenses/by-sa/2.5
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"data": "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. strongSwan Exists in an integer overflow vulnerability.Denial of service (DoS) It may be put into a state. ==========================================================================\nUbuntu Security Notice USN-5111-1\nOctober 19, 2021\n\nstrongswan vulnerabilities\n==========================================================================\n\nA security issue affects these releases of Ubuntu and its derivatives:\n\n- Ubuntu 21.10\n- Ubuntu 21.04\n- Ubuntu 20.04 LTS\n- Ubuntu 18.04 LTS\n\nSummary:\n\nSeveral security issues were fixed in strongSwan. \n\nSoftware Description:\n- strongswan: IPsec VPN solution\n\nDetails:\n\nIt was discovered that strongSwan incorrectly handled certain RSASSA-PSS\nsignatures. A remote attacker could use this issue to cause strongSwan to\ncrash, resulting in a denial of service. (CVE-2021-41990)\n\nIt was discovered that strongSwan incorrectly handled replacing\ncertificates in the cache. A remote attacker could use this issue to cause\nstrongSwan to crash, resulting in a denial of service, or possibly execute\narbitrary code. (CVE-2021-41991)\n\nUpdate instructions:\n\nThe problem can be corrected by updating your system to the following\npackage versions:\n\nUbuntu 21.10:\n libstrongswan 5.9.1-1ubuntu3.1\n strongswan 5.9.1-1ubuntu3.1\n\nUbuntu 21.04:\n libstrongswan 5.9.1-1ubuntu1.2\n strongswan 5.9.1-1ubuntu1.2\n\nUbuntu 20.04 LTS:\n libstrongswan 5.8.2-1ubuntu3.3\n strongswan 5.8.2-1ubuntu3.3\n\nUbuntu 18.04 LTS:\n libstrongswan 5.6.2-1ubuntu2.7\n strongswan 5.6.2-1ubuntu2.7\n\nIn general, a standard system update will make all the necessary changes. \n\nReferences:\n https://ubuntu.com/security/notices/USN-5111-1\n CVE-2021-41990, CVE-2021-41991\n\nPackage Information:\n https://launchpad.net/ubuntu/+source/strongswan/5.9.1-1ubuntu3.1\n https://launchpad.net/ubuntu/+source/strongswan/5.9.1-1ubuntu1.2\n https://launchpad.net/ubuntu/+source/strongswan/5.8.2-1ubuntu3.3\n https://launchpad.net/ubuntu/+source/strongswan/5.6.2-1ubuntu2.7\n. -----BEGIN PGP SIGNED MESSAGE-----\nHash: SHA512\n\n- -------------------------------------------------------------------------\nDebian Security Advisory DSA-4989-1 security@debian.org\nhttps://www.debian.org/security/ Yves-Alexis Perez\nOctober 18, 2021 https://www.debian.org/security/faq\n- -------------------------------------------------------------------------\n\nPackage : strongswan\nCVE ID : CVE-2021-41990 CVE-2021-41991\n\nResearchers at the United States of America National Security Agency (NSA)\nidentified two denial of services vulnerability in strongSwan, an IKE/IPsec\nsuite. \n\nCVE-2021-41990\n\n RSASSA-PSS signatures whose parameters define a very high salt length can\n trigger an integer overflow that can lead to a segmentation fault. \n Generating a signature that bypasses the padding check to trigger the crash\n requires access to the private key that signed the certificate. However,\n the certificate does not have to be trusted. Because the gmp and the\n openssl plugins both check if a parsed certificate is self-signed (and the\n signature is valid), this can e.g. be triggered by an unrelated\n self-signed CA certificate sent by an initiator. Depending on the generated random value, this could\n lead to an integer overflow that results in a double-dereference and a call\n using out-of-bounds memory that most likely leads to a segmentation fault. \n Remote code execution can\u0027t be ruled out completely, but attackers have no\n control over the dereferenced memory, so it seems unlikely at this point. \n\nFor the oldstable distribution (buster), these problems have been fixed\nin version 5.7.2-1+deb10u1. \n\nFor the stable distribution (bullseye), these problems have been fixed in\nversion 5.9.1-1+deb11u1. \n\nWe recommend that you upgrade your strongswan packages. \n\nFor the detailed security status of strongswan please refer to\nits security tracker page at:\nhttps://security-tracker.debian.org/tracker/strongswan\n\nFurther information about Debian Security Advisories, how to apply\nthese updates to your system and frequently asked questions can be\nfound at: https://www.debian.org/security/\n\nMailing list: debian-security-announce@lists.debian.org\n-----BEGIN PGP SIGNATURE-----\n\niQEzBAEBCgAdFiEE8vi34Qgfo83x35gF3rYcyPpXRFsFAmFtyAUACgkQ3rYcyPpX\nRFudiwf+NNcRRRJychLI5ycMKVxkr2tEAJDeVZjv966YBM1tXnCtROydXf5Zip2M\ndn/EYO71uuT5FKhs8tJyx5iv2bFcrvyqQQo6DFQvXZHR0+9U+MHcR9qB7JJDM4nK\n+JXOEmAv3akCFhiP6jMx5B6jRWR1e4MOwxmgrgGu/nwy2cYBQPI43qPTrXi3Fcnv\neSgeyLqyZNLmaGmj8jQfTnc8bdVF5xAs6mHhVqNJxQCdouG9b4/S6AxJsl3IMxyF\nWZhtCNUvhHH8wz0lZVElR3Qs6fUu0phKdlT9kBv/o6fP3ceiYOCEh8SqBgYU3hQL\nxyB0uP4EcSR70TvKZMB2jV/tGG1A8w==\n=/Xvi\n-----END PGP SIGNATURE-----\n. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -\nGentoo Linux Security Advisory GLSA 202405-08\n- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -\n https://security.gentoo.org/\n- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -\n\n Severity: Normal\n Title: strongSwan: Multiple Vulnerabilities\n Date: May 04, 2024\n Bugs: #818841, #832460, #878887, #899964\n ID: 202405-08\n\n- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -\n\nSynopsis\n=======\nMultiple vulnerabilities have been discovered in strongSwan, the worst\nof which could possibly lead to remote code execution. \n\nBackground\n=========\nstrongSwan is an IPSec implementation for Linux. \n\nAffected packages\n================\nPackage Vulnerable Unaffected\n------------------ ------------ ------------\nnet-vpn/strongswan \u003c 5.9.10 \u003e= 5.9.10\n\nDescription\n==========\nMultiple vulnerabilities have been discovered in strongSwan. Please\nreview the CVE identifiers referenced below for details. \n\nImpact\n=====\nPlease review the referenced CVE identifiers for details. \n\nWorkaround\n=========\nThere is no known workaround at this time. \n\nResolution\n=========\nAll strongSwan users should upgrade to the latest version:\n\n # emerge --sync\n # emerge --ask --oneshot --verbose \"\u003e=net-vpn/strongswan-5.9.10\"\n\nReferences\n=========\n[ 1 ] CVE-2021-41991\n https://nvd.nist.gov/vuln/detail/CVE-2021-41991\n[ 2 ] CVE-2021-45079\n https://nvd.nist.gov/vuln/detail/CVE-2021-45079\n[ 3 ] CVE-2022-40617\n https://nvd.nist.gov/vuln/detail/CVE-2022-40617\n[ 4 ] CVE-2023-26463\n https://nvd.nist.gov/vuln/detail/CVE-2023-26463\n\nAvailability\n===========\nThis GLSA and any updates to it are available for viewing at\nthe Gentoo Security Website:\n\n https://security.gentoo.org/glsa/202405-08\n\nConcerns?\n========\nSecurity is a primary focus of Gentoo Linux and ensuring the\nconfidentiality and security of our users\u0027 machines is of utmost\nimportance to us. Any security concerns should be addressed to\nsecurity@gentoo.org or alternatively, you may file a bug at\nhttps://bugs.gentoo.org. \n\nLicense\n======\nCopyright 2024 Gentoo Foundation, Inc; referenced text\nbelongs to its owner(s). \n\nThe contents of this document are licensed under the\nCreative Commons - Attribution / Share Alike license. \n\nhttps://creativecommons.org/licenses/by-sa/2.5\n",
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