CVE-2019-9023 Memory corruption in n/a
Heap-based buffer over-reads in PHP mbstring regex functions allow attackers to cause denial of service or disclose sensitive memory contents via invalid multibyte data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2019-9023?
CVE-2019-9023 is a critical memory corruption vulnerability in Canonical Ubuntu Linux, published on 22 Feb 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue was discovered in PHP before 5.6.40, 7.x before 7.1.26, 7.2.x before 7.2.14, and 7.3.x before 7.3.1. A number of heap-based buffer over-read instances are present in mbstring regular expression functions when supplied with invalid multibyte data. These occur in ext/mbstring/oniguruma/regcomp.c, ext/mbstring/oniguruma/regexec.c, ext/mbstring/oniguruma/regparse.c, ext/mbstring/oniguruma/enc/unicode.c, and ext/mbstring/oniguruma/src/utf32_be.c when a multibyte regular expression pattern contains invalid multibyte sequences.
Weakness: CWE-125
Which versions are affected by CVE-2019-9023?
It affects 5 products.
Products include Canonical Ubuntu Linux, Debian Debian Linux, Netapp Storage Automation Store, Opensuse Leap, Php Php.
How do I fix CVE-2019-9023?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2019-9023 being exploited?
There is no known exploitation of CVE-2019-9023 in the wild and no public exploit code.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as GHSA-f6fp-28gh-x93q, UBUNTU-CVE-2019-9023.