ID

VAR-202005-0397

CVE

CVE-2020-12762

TITLE

json-c Input validation error vulnerability

DESCRIPTION

json-c through 0.14 has an integer overflow and out-of-bounds write via a large JSON file, as demonstrated by printbuf_memappend. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Moderate: json-c security and bug fix update Advisory ID: RHSA-2021:4382-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:4382 Issue date: 2021-11-09 CVE Names: CVE-2020-12762 ==================================================================== 1. Summary: An update for json-c is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux AppStream (v. 8) - aarch64, ppc64le, s390x, x86_64 Red Hat Enterprise Linux BaseOS (v. 8) - aarch64, ppc64le, s390x, x86_64 Red Hat Enterprise Linux CRB (v. 8) - noarch 3. Description: JSON-C implements a reference counting object model that allows users to easily construct JavaScript Object Notation (JSON) objects in C, output them as JSON formatted strings, and parse JSON formatted strings back into the C representation of JSON objects. Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.5 Release Notes linked from the References section. 4. Solution: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 5. Package List: Red Hat Enterprise Linux AppStream (v. 8): aarch64: json-c-debuginfo-0.13.1-2.el8.aarch64.rpm json-c-debugsource-0.13.1-2.el8.aarch64.rpm json-c-devel-0.13.1-2.el8.aarch64.rpm ppc64le: json-c-debuginfo-0.13.1-2.el8.ppc64le.rpm json-c-debugsource-0.13.1-2.el8.ppc64le.rpm json-c-devel-0.13.1-2.el8.ppc64le.rpm s390x: json-c-debuginfo-0.13.1-2.el8.s390x.rpm json-c-debugsource-0.13.1-2.el8.s390x.rpm json-c-devel-0.13.1-2.el8.s390x.rpm x86_64: json-c-debuginfo-0.13.1-2.el8.i686.rpm json-c-debuginfo-0.13.1-2.el8.x86_64.rpm json-c-debugsource-0.13.1-2.el8.i686.rpm json-c-debugsource-0.13.1-2.el8.x86_64.rpm json-c-devel-0.13.1-2.el8.i686.rpm json-c-devel-0.13.1-2.el8.x86_64.rpm Red Hat Enterprise Linux BaseOS (v. 8): Source: json-c-0.13.1-2.el8.src.rpm aarch64: json-c-0.13.1-2.el8.aarch64.rpm json-c-debuginfo-0.13.1-2.el8.aarch64.rpm json-c-debugsource-0.13.1-2.el8.aarch64.rpm ppc64le: json-c-0.13.1-2.el8.ppc64le.rpm json-c-debuginfo-0.13.1-2.el8.ppc64le.rpm json-c-debugsource-0.13.1-2.el8.ppc64le.rpm s390x: json-c-0.13.1-2.el8.s390x.rpm json-c-debuginfo-0.13.1-2.el8.s390x.rpm json-c-debugsource-0.13.1-2.el8.s390x.rpm x86_64: json-c-0.13.1-2.el8.i686.rpm json-c-0.13.1-2.el8.x86_64.rpm json-c-debuginfo-0.13.1-2.el8.i686.rpm json-c-debuginfo-0.13.1-2.el8.x86_64.rpm json-c-debugsource-0.13.1-2.el8.i686.rpm json-c-debugsource-0.13.1-2.el8.x86_64.rpm Red Hat Enterprise Linux CRB (v. 8): noarch: json-c-doc-0.13.1-2.el8.noarch.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/ 7. References: https://access.redhat.com/security/cve/CVE-2020-12762 https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.5_release_notes/ 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2021 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBYYrej9zjgjWX9erEAQiU1g//YzM77GdfeN9wtXjfeQ400cw5AsR8XjOm 3eS4kMuwlN0w5reO9n3OnPs3SCZVDcoRmPJ1Z71eK796SyczEzfItkB8HVpPIL2E c8QfOQ1a2m/Izws30u8/xASfY3JXEWFeX5Pip7OrQ8T+6BhpsYEMzD7zC6aPXgzw g7T87IaVa1WPsORtd/KvDivVGBLt9jwzvjbJAOmRQ0ccWC9ylsjqXiuvDzFlyL+h R0tSJXyNDFebOwwAY5cJ0Go1NjlGC61K0SgB/S/WnQyqKcqN6kss/1fFCjGs/wvy Z52AMuB1BeOjPdxPydwErGjtl7qxn0ygpKwxKsHJwbhYpuUEBhkn6LG998y9QBVj gQDuySEzrR+0j1Tg579g/z1fvtbvXCU0/Wt01uoeWJlyKVR4B8dJAV4NHLFXoon8 Uw+dlJFvFPlu0LERlaYquQJ0FksWZH9G+3mrVo2F9X8IOMint0zNe+X+mE7zuhOX qluAe5stgV5BNtXkboSmt3R4mk4suNbgexZvyC9cMeIY+A2GNB4NHcVtwPVSs4Bg QG2SPVqwXL73ViKAS9YSof9uSY2hRXqSKs+BRnIVxKZS0EzFybv76NQtmx7NjZlG JUkHfT/W9UnTxfgmrDs6xYUKNCs6lyvkTmBfGf0+S+CLTToVImr9DPN/EO2r+/xS A4oHKkiq9g8\x8eca -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://listman.redhat.com/mailman/listinfo/rhsa-announce . Bugs fixed (https://bugzilla.redhat.com/): 2030932 - CVE-2021-44228 log4j-core: Remote code execution in Log4j 2.x when logs contain an attacker-controlled string value 5. Summary: Red Hat Advanced Cluster Management for Kubernetes 2.2.11 General Availability release images, which provide one or more container updates and bug fixes. Description: Red Hat Advanced Cluster Management for Kubernetes 2.2.11 images Red Hat Advanced Cluster Management for Kubernetes provides the capabilities to address common challenges that administrators and site reliability engineers face as they work across a range of public and private cloud environments. Clusters and applications are all visible and managed from a single console — with security policy built in. See the following Release Notes documentation, which will be updated shortly for this release, for additional details about this release: https://access.redhat.com/documentation/en-us/red_hat_advanced_cluster_management_for_kubernetes/2.2/html/release_notes/ Security updates: * object-path: Type confusion vulnerability can lead to a bypass of CVE-2020-15256 (CVE-2021-23434) * follow-redirects: Exposure of Private Personal Information to an Unauthorized Actor (CVE-2022-0155) Related bugs: * RHACM 2.2.11 images (Bugzilla #2029508) * ClusterImageSet has 4.5 which is not supported in ACM 2.2.10 (Bugzilla #2030859) 3. Bugs fixed (https://bugzilla.redhat.com/): 1999810 - CVE-2021-23434 object-path: Type confusion vulnerability can lead to a bypass of CVE-2020-15256 2029508 - RHACM 2.2.11 images 2030859 - ClusterImageSet has 4.5 which is not supported in ACM 2.2.10 2044556 - CVE-2022-0155 follow-redirects: Exposure of Private Personal Information to an Unauthorized Actor 5. The following data is constructed from data provided by Red Hat's json file at: https://access.redhat.com/security/data/csaf/v2/advisories/2023/rhsa-2023_6976.json Red Hat officially shut down their mailing list notifications October 10, 2023. Due to this, Packet Storm has recreated the below data as a reference point to raise awareness. It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment. ========================================================================= Ubuntu Security Notice USN-4360-4 May 28, 2020 json-c vulnerability ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.04 LTS - Ubuntu 19.10 - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS - Ubuntu 14.04 ESM - Ubuntu 12.04 ESM Summary: json-c could be made to execute arbitrary code if it received a specially crafted JSON file. The security fix introduced a memory leak that was reverted in USN-4360-2 and USN-4360-3. This update provides the correct fix update for CVE-2020-12762. Original advisory details: It was discovered that json-c incorrectly handled certain JSON files. An attacker could possibly use this issue to execute arbitrary code. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS: libjson-c4 0.13.1+dfsg-7ubuntu0.3 Ubuntu 19.10: libjson-c4 0.13.1+dfsg-4ubuntu0.3 Ubuntu 18.04 LTS: libjson-c3 0.12.1-1.3ubuntu0.3 Ubuntu 16.04 LTS: libjson-c2 0.11-4ubuntu2.6 libjson0 0.11-4ubuntu2.6 Ubuntu 14.04 ESM: libjson-c2 0.11-3ubuntu1.2+esm3 libjson0 0.11-3ubuntu1.2+esm3 Ubuntu 12.04 ESM: libjson0 0.9-1ubuntu1.4 In general, a standard system update will make all the necessary changes. Bugs fixed (https://bugzilla.redhat.com/): 1963232 - CVE-2021-33194 golang: x/net/html: infinite loop in ParseFragment 5. JIRA issues fixed (https://issues.jboss.org/): LOG-1168 - Disable hostname verification in syslog TLS settings LOG-1235 - Using HTTPS without a secret does not translate into the correct 'scheme' value in Fluentd LOG-1375 - ssl_ca_cert should be optional LOG-1378 - CLO should support sasl_plaintext(Password over http) LOG-1392 - In fluentd config, flush_interval can't be set with flush_mode=immediate LOG-1494 - Syslog output is serializing json incorrectly LOG-1555 - Fluentd logs emit transaction failed: error_class=NoMethodError while forwarding to external syslog server LOG-1575 - Rejected by Elasticsearch and unexpected json-parsing LOG-1735 - Regression introducing flush_at_shutdown LOG-1774 - The collector logs should be excluded in fluent.conf LOG-1776 - fluentd total_limit_size sets value beyond available space LOG-1822 - OpenShift Alerting Rules Style-Guide Compliance LOG-1859 - CLO Should not error and exit early on missing ca-bundle when cluster wide proxy is not enabled LOG-1862 - Unsupported kafka parameters when enabled Kafka SASL LOG-1903 - Fix the Display of ClusterLogging type in OLM LOG-1911 - CLF API changes to Opt-in to multiline error detection LOG-1918 - Alert `FluentdNodeDown` always firing LOG-1939 - Opt-in multiline detection breaks cloudwatch forwarding 6

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

local

TYPE

input validation error

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Red Hat

SOURCES

LAST UPDATE DATE

2025-06-26T21:54:45.071000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE