Out-of-bounds Read in Apple Macos

CVE-2019-20838

libpcre in PCRE before 8.43 allows a subject buffer over-read in JIT when UTF is disabled, and \X or \R has more than one fixed quantifier, a related issue to CVE-2019-20454.

Vulnerability class: Buffer Overflow

EPSS: 0.028 (84.8th percentile) — read the EPSS interpretation.

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.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

  • cve@mitre.org (Patch, VDB Entry, Third Party Advisory, x_refsource_MISC, Issue Tracking)
  • cve@mitre.org (x_refsource_MISC, Release Notes, Vendor Advisory)
  • cve@mitre.org (x_refsource_CONFIRM, Vendor Advisory)
  • cve@mitre.org (mailing-list, x_refsource_FULLDISC, Mailing List, Third Party Advisory)
  • cve@mitre.org (x_refsource_CONFIRM, Vendor Advisory)
  • cve@mitre.org (mailing-list, x_refsource_FULLDISC, Mailing List, Third Party Advisory)
  • cve@mitre.org (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2019-20838?
CVE-2019-20838 is a high-severity vulnerability in Apple Macos, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2020-06-15.
How severe is CVE-2019-20838?
High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2019-20838 known to be exploited?
17 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.