CVE-2017-9224: oniguruma_project oniguruma Out-of-bounds Read
Vulnerability summary
CVE-2017-9224 is a critical (CVSS 9.8) Out-of-bounds Read vulnerability in oniguruma_project oniguruma. EPSS estimates a 6.54% chance of exploitation in the next 30 days, higher than 93.8% of scored vulnerabilities. 1 public exploit is recorded.
Public exploit (GitHub, Date unknown)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 7 · Related 4Timeline
- 24-05-2017PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
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 read occurs in match_at() during regular expression searching. A logical error involving order of validation and access in match_at() could result in an out-of-bounds read from a stack buffer.
CVSS metrics
6 scores · 4 sources · 3 versions- OSV · AlpineEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
6.54%
Chance of exploitation in the next 30 days
Percentile
94%
Versus all other CVEs
30-day change
No change 0.00 pp
From 6.54% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundOniguruma
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu3 products
- libonig< 5.9.1-1ubuntu1.1 | < 5.9.6-1ubuntu0.1
- php5< 5.5.9+dfsg-1ubuntu4.22
- php7.0< 7.0.22-0ubuntu0.16.04.1
Alpine2 products
- php5< 5.6.31-r0
- php7< 7.0.21-r0 | < 7.1.9-r0 | < 7.1.7-r0
Debian1 product
- libonig< 6.1.3-2
Oniguruma_project1 product
- onigurumaEOL6.2.0
Php1 product
- php< 5.6.31 | ≥ 7.0.0, < 7.0.21 | ≥ 7.1.0, < 7.1.7
5 vendors · 8 products
References
10 links- github.com/kkos/oniguruma/commit/690313a061f7a4fa614ec5cc8368b4f2284e059bX Refsource CONFIRMPatchThird Party Advisory
