CVE-2023-0464: Excessive Resource Usage Verifying X.509 Policy Constraints
First published: Wed Mar 22 2023(Updated: )
A security vulnerability has been identified in all supported versions of OpenSSL related to the verification of X.509 certificate chains that include policy constraints. Attackers may be able to exploit this vulnerability by creating a malicious certificate chain that triggers exponential use of computational resources, leading to a denial-of-service (DoS) attack on affected systems. Policy processing is disabled by default but can be enabled by passing the `-policy' argument to the command line utilities or by calling the `X509_VERIFY_PARAM_set1_policies()' function.
Credit: openssl-security@openssl.org openssl-security@openssl.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| OpenSSL OpenSSL | >=1.0.2<1.0.2zh | |
| OpenSSL OpenSSL | >=1.1.1<1.1.1u | |
| OpenSSL OpenSSL | >=3.0.0<3.0.9 | |
| OpenSSL OpenSSL | >=3.1.0<3.1.1 | |
| debian/openssl | <=1.1.1n-0+deb10u3 | 1.1.1n-0+deb10u6 1.1.1w-0+deb11u1 1.1.1n-0+deb11u5 3.0.11-1~deb12u2 3.1.4-2 |
| redhat/openssl | <3.1.1 | 3.1.1 |
| redhat/openssl | <3.0.9 | 3.0.9 |
| redhat/openssl | <1.1.1 | 1.1.1 |
| IBM Cognos Analytics | <=12.0.0-12.0.1 | |
| IBM Cognos Analytics | <=11.2.0-11.2.4 FP2 | |
| IBM Cognos Analytics | <=11.1.1-11.1.7 FP7 |
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Reference Links
- https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=2017771e2db3e2b96f89bbe8766c3209f6a99545
- https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=2dcd4f1e3115f38cefa43e3efbe9b801c27e642e
- https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=879f7080d7e141f415c79eaa3a8ac4a3dad0348b
- https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=959c59c7a0164117e7f8366466a32bb1f8d77ff1
- https://lists.debian.org/debian-lts-announce/2023/06/msg00011.html
- https://www.debian.org/security/2023/dsa-5417
- https://www.openssl.org/news/secadv/20230322.txt
- https://git.openssl.org/gitweb/?p=openssl.git;a=commit;h=959c59c7a0164117e7f8366466a32bb1f8d77ff1
- https://git.openssl.org/gitweb/?p=openssl.git;a=commit;h=879f7080d7e141f415c79eaa3a8ac4a3dad0348b
- https://security-tracker.debian.org/tracker/CVE-2023-0464
- https://www.couchbase.com/alerts/
- https://security.gentoo.org/glsa/202402-08
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2181084
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2181085
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2181086
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2181087
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2181088
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2181089
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2181090
- https://access.redhat.com/errata/RHSA-2023:3722
- https://access.redhat.com/security/cve/cve-2023-0464
- https://access.redhat.com/errata/RHSA-2023:7622
- https://access.redhat.com/errata/RHSA-2023:7623
- https://access.redhat.com/errata/RHSA-2023:7625
- https://access.redhat.com/errata/RHSA-2023:7626
- https://bugzilla.redhat.com/show_bug.cgi?id=2181082
- https://exchange.xforce.ibmcloud.com/vulnerabilities/250736
- https://www.ibm.com/support/pages/node/7123154 (Advisory)
Frequently Asked Questions
What is CVE-2023-0464?
CVE-2023-0464 is a security vulnerability in OpenSSL related to the verification of X.509 certificate chains that include policy constraints.
How can this vulnerability be exploited?
Attackers may be able to exploit this vulnerability by creating a malicious certificate chain that triggers exponential use of resources.
Which versions of OpenSSL are affected by CVE-2023-0464?
All supported versions of OpenSSL are affected, including 1.1.1n-0+deb10u6, 1.1.1n-0+deb11u5, 3.0.9-1, and 3.0.11-1.
How can I fix the CVE-2023-0464 vulnerability?
To fix the vulnerability, update to the latest versions of OpenSSL, such as 1.1.1n-0+deb10u6, 1.1.1n-0+deb11u5, 3.0.9-1, or 3.0.11-1.
Where can I find more information about CVE-2023-0464?
You can find more information about CVE-2023-0464 on the official OpenSSL website and in the provided references.
- collector/nvd-index
- collector/security-tracker-debian
- agent/author
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- agent/first-publish-date
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- collector/mitre-cve
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- collector/redhat-bugzilla
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- alias/CVE-2023-0464
- agent/last-modified-date
- agent/references
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- collector/ibm-support
- source/IBM
- vendor/openssl
- canonical/openssl openssl
- version/openssl openssl/1.0.2
- version/openssl openssl/1.1.1
- version/openssl openssl/3.0.0
- version/openssl openssl/3.1.0
- package-manager/debian
- package-manager/redhat
- vendor/ibm
- canonical/ibm cognos analytics
- version/ibm cognos analytics/12.0.0-12.0.1
- version/ibm cognos analytics/11.2.0-11.2.4 fp2
- version/ibm cognos analytics/11.1.1-11.1.7 fp7