Out-of-bounds Read in Oniguruma Project
CVE-2019-19203
An issue was discovered in Oniguruma 6.x before 6.9.4_rc2. In the function gb18030_mbc_enc_len in file gb18030.c, a UChar pointer is dereferenced without checking if it passed the end of the matched string. This leads to a heap-based buffer over-read.
Vulnerability class: Buffer Overflow
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: 0.041 (90.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 90.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.041 · newest: 0.041 · change: 0.000
Affected products
- Oniguruma Project — versions 6.9.4
- Fedoraproject Fedora — versions 30, 31
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/kkos/oniguruma/releases/tag/v6.9.4_rc2 (Release Notes)
- github.com/kkos/oniguruma/issues/163 (Exploit, Patch, Third Party Advisory)
- github.com/ManhNDd/CVE-2019-19203 (Exploit, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- github.com/tarantula-team/CVE-2019-19203 (Third Party Advisory)
Frequently asked questions
- What is CVE-2019-19203?
- CVE-2019-19203 is a high-severity vulnerability in Oniguruma Project, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2019-11-21.
- How severe is CVE-2019-19203?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2019-19203 known to be exploited?
- 12 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.