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OVAL Definitions
>
OVAL Definition Details
Id
oval:ru.altx-soft.nix:def:26388
[Eng]
Version
5
Class
patch
ALTXid
153663
Language
Russian
Severity
Medium
Title
ALAS-2015-564 -- обновление безопасности для openssl
Description
During certificate verfification, OpenSSL (starting from version 1.0.1n and 1.0.2b) will attempt to find an alternative certificate chain if the first attempt to build such a chain fails. An error in the implementation of this logic can mean that an attacker could cause certain checks on untrusted certificates to be bypassed, such as the CA flag, enabling them to use a valid leaf certificate to act as a CA and "issue" an invalid certificate.
This issue will impact any application that verifies certificates including SSL/TLS/DTLS clients and SSL/TLS/DTLS servers using client authentication.
The only version of OpenSSL from the Amazon Linux AMI that is impacted by this CVE is openssl-1.0.1k-10.86.amzn1, which was published as ALAS-2015-550.
Family
unix
Platform
Amazon Linux AMI
Product
openssl
Reference
VENDOR: ALAS-2015-564
VENDOR: ALAS-2015-564
Id:
ALAS-2015-564
Reference:
https://alas.aws.amazon.com/ALAS-2015-564.html
CVE: CVE-2015-1793
CVE: CVE-2015-1793
Id:
CVE-2015-1793
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1793
Comment
: The X509_verify_cert function in crypto/x509/x509_vfy.c in OpenSSL 1.0.1n, 1.0.1o, 1.0.2b, and 1.0.2c does not properly process X.509 Basic Constraints cA values during identification of alternative certificate chains, which allows remote attackers to spoof a Certification Authority role and trigger unintended certificate verifications via a valid leaf certificate.
CVSSv2 Score:
6.4
Access vector:
NETWORK
Access complexity:
LOW
Authentication:
NONE
Confidentiality impact:
PARTIAL
Integrity impact:
PARTIAL
Availability impact:
NONE
CVSSv2 Vector:
AV:N/AC:L/Au:N/C:P/I:P/A:N
CVSSv3 Score:
6.5
Attack vector:
NETWORK
Attack complexity:
LOW
Privileges required:
NONE
User interaction:
NONE
Scope:
UNCHANGED
Confidentiality impact:
LOW
Integrity impact:
LOW
Availability impact:
NONE
CVSSv3 Vector:
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CWE:
254 (Security Features)
References:
http://openssl.org/news/secadv_20150709.txt (CONFIRM)
SSRT102180 (HP)
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10694 (CONFIRM)
http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html (CONFIRM)
http://www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.html (CONFIRM)
http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html (CONFIRM)
http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html (CONFIRM)
91787 (BID)
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05184351 (CONFIRM)
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05045763 (CONFIRM)
HPSBGN03424 (HP)
http://www.oracle.com/technetwork/topics/security/bulletinjul2015-2511963.html (CONFIRM)
http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html (CONFIRM)
75652 (BID)
http://fortiguard.com/advisory/2015-07-09-cve-2015-1793-openssl-alternative-chains-certificate-forgery (CONFIRM)
http://www1.huawei.com/en/security/psirt/security-bulletins/security-advisories/hw-454058.htm (CONFIRM)
http://www.fortiguard.com/advisory/2015-07-09-cve-2015-1793-openssl-alternative-chains-certificate-forgery (CONFIRM)
https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04822825 (CONFIRM)
https://kc.mcafee.com/corporate/index?page=content&id=SB10125 (CONFIRM)
GLSA-201507-15 (GENTOO)
NetBSD-SA2015-008 (NETBSD)
FreeBSD-SA-15:12 (FREEBSD)
SSA:2015-190-01 (SLACKWARE)
1032817 (SECTRACK)
20150710 OpenSSL Alternative Chains Certificate Forgery Vulnerability (July 2015) Affecting Cisco Products (CISCO)
FEDORA-2015-11475 (FEDORA)
FEDORA-2015-11414 (FEDORA)
38640 (EXPLOIT-DB)
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html (CONFIRM)
https://help.ecostruxureit.com/display/public/UADCO8x/StruxureWare+Data+Center+Operation+Software+Vulnerability+Fixes (CONFIRM)
https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=9a0db453ba017ebcaccbee933ee6511a9ae4d1c8 ()
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