high
7.5
CWE
191
Advisory Published
Updated

CVE-2020-36221: Integer Underflow

First published: Tue Jan 26 2021(Updated: )

An integer underflow was discovered in OpenLDAP before 2.4.57 leading to slapd crashes in the Certificate Exact Assertion processing, resulting in denial of service (schema_init.c serialNumberAndIssuerCheck).

Credit: CVE-2020-36226 CVE-2020-36227 CVE-2020-36223 CVE-2020-36224 CVE-2020-36225 CVE-2020-36221 CVE-2020-36228 CVE-2020-36222 CVE-2020-36230 CVE-2020-36229 CVE-2020-36226 CVE-2020-36229 CVE-2020-36225 CVE-2020-36224 CVE-2020-36223 CVE-2020-36227 CVE-2020-36228 CVE-2020-36221 CVE-2020-36222 CVE-2020-36230 cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Openldap Openldap<2.4.57
Debian Debian Linux=9.0
Debian Debian Linux=10.0
Apple Mac OS X>=10.14.0<10.14.6
Apple Mac OS X=10.14.6
Apple Mac OS X=10.14.6-security_update_2019-004
Apple Mac OS X=10.14.6-security_update_2019-005
Apple Mac OS X=10.14.6-security_update_2019-006
Apple Mac OS X=10.14.6-security_update_2019-007
Apple Mac OS X=10.14.6-security_update_2020-001
Apple Mac OS X=10.14.6-security_update_2020-002
Apple Mac OS X=10.14.6-security_update_2020-003
Apple Mac OS X=10.14.6-security_update_2020-004
Apple Mac OS X=10.14.6-security_update_2020-005
Apple Mac OS X=10.14.6-security_update_2020-006
Apple Mac OS X=10.14.6-security_update_2020-007
Apple Mac OS X=10.14.6-security_update_2021-001
Apple Mac OS X=10.14.6-security_update_2021-002
Apple Mac OS X=10.14.6-security_update_2021-003
Apple Mac OS X=10.14.6-supplemental_update
Apple Mac OS X=10.14.6-supplemental_update_2
Apple macOS>=11.1<11.4
Apple Mojave
debian/openldap
2.4.47+dfsg-3+deb10u7
2.4.57+dfsg-3+deb11u1
2.5.13+dfsg-5

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Peer vulnerabilities

(Found alongside the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID for this issue?

    The vulnerability ID for this issue is CVE-2020-36221.

  • What is the affected software?

    The affected software includes macOS Big Sur, Mojave, and Catalina.

  • How was this issue addressed?

    This issue was addressed with improved checks.

  • What is the severity of CVE-2020-36221?

    The severity of CVE-2020-36221 is not specified.

  • How do I fix CVE-2020-36221?

    To fix CVE-2020-36221, make sure you have the latest version of macOS installed.

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