CVE-2019-9022
php: memcpy with negative length via crafted DNS response
Severity
LowRed Hat Product Security
CVSS 3.0
Review impact separately from score.
Published · December 29, 2018
Updated · June 28, 2026
Description
An issue was discovered in PHP 7.x before 7.1.26, 7.2.x before 7.2.14, and 7.3.x before 7.3.2. dns_get_record misparses a DNS response, which can allow a hostile DNS server to cause PHP to misuse memcpy, leading to read operations going past the buffer allocated for DNS data. This affects php_parserr in ext/standard/dns.c for DNS_CAA and DNS_ANY queries.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.0 · 4.6CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:L
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer