Buffer overflow in Oniguruma Project
CVE-2017-9225
An issue was discovered in Oniguruma 6.2.0, as used in Oniguruma-mod in Ruby through 2.4.1 and mbstring in PHP through 7.1.5. A stack out-of-bounds write in onigenc_unicode_get_case_fold_codes_by_str() occurs during regular expression compilation. Code point 0xFFFFFFFF is not properly handled in unicode_unfold_key(). A malformed regular expression could result in 4 bytes being written off the end of a stack buffer of expand_case_fold_string() during the call to onigenc_unicode_get_case_fold_codes_by_str(), a typical stack buffer overflow.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.031 (87.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.031 · newest: 0.031 · change: 0.000
Affected products
- Oniguruma Project — versions 6.2.0
- PHP
- Ruby-Lang Ruby
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/kkos/oniguruma/commit/166a6c3999bf06b4de0ab4ce6b088a468cc4029f (Patch, Third Party Advisory)
- github.com/kkos/oniguruma/issues/56 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2017-9225?
- CVE-2017-9225 is a critical-severity vulnerability in Oniguruma Project, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2017-05-24.
- How severe is CVE-2017-9225?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2017-9225 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.