Integer overflow in Apple macOS
CVE-2020-36221
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).
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.850 (99.7th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 100th percentile — 99.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.842 · newest: 0.850 · change: +0.008
Affected products
- Apple macOS
- Apple Mac OS X — versions 10.14.6
- Openldap
- Debian Linux — versions 9.0, 10.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugs.openldap.org/show_bug.cgi (Issue Tracking, Vendor Advisory)
- git.openldap.org/openldap/openldap/-/commit/38ac838e4150c626bbfa0082b7e2cf3a2bb… (Patch, Vendor Advisory)
- bugs.openldap.org/show_bug.cgi (Issue Tracking, Vendor Advisory)
- git.openldap.org/openldap/openldap/-/commit/58c1748e81c843c5b6e61648d2a4d1d82b4… (Patch, Vendor Advisory)
- git.openldap.org/openldap/openldap/-/tags/OPENLDAP_REL_ENG_2_4_57 (Release Notes, Vendor Advisory)
- lists.debian.org/debian-lts-announce/2021/02/msg00005.html (mailing-list, Mailing List, Third Party Advisory)
- www.debian.org/security/2021/dsa-4845 (vendor-advisory, Third Party Advisory)
- security.netapp.com/advisory/ntap-20210226-0002/ (Third Party Advisory)
- support.apple.com/kb/HT212529 (Third Party Advisory)
- support.apple.com/kb/HT212531 (Third Party Advisory)
Frequently asked questions
- What is CVE-2020-36221?
- CVE-2020-36221 is a high-severity vulnerability in Apple macOS, classified under Integer Underflow. CVSS score: 7.5/10. Published 2021-01-26.
- How severe is CVE-2020-36221?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2020-36221 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.