CVE-2017-9229

Exp

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 SIGSEGV occurs in left_adjust_char_head() during regular expression compilation. Invalid handling of reg->dmax in forward_search_range() could result in an invalid pointer dereference, normally as an immediate denial-of-service condition.

Published: 2017-05-24 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2017-9229 is rated High Exploit Risk (81.7/100): CVSS High severity, with high exploitation likelihood (EPSS 5.13%, 91th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +4.75% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2017-9229

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2017-9229

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.38% 5.13% +4.75%
2 2026-04-24 0.59% 0.38% -0.21%
3 2026-03-04 — 0.59% —

Full EPSS history (60 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2017-9229

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2017-9229

OS Trackers for CVE-2017-9229

vendor priority summary link
debian not yet assigned CVE-2017-9229 not yet assigned priority: Debian including 1 source packages (libonig), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2017-9229
redhat medium — https://access.redhat.com/security/cve/CVE-2017-9229
suse medium CVE-2017-9229 severity moderate: SUSE including 384 source package names (apache2-mod_php5-5.2.14-0.7.30.111.11.1, apache2-mod_php5-5.5.14-109.13.1, …), 989 product×package rows across 84 product lines (HPE Helion OpenStack 8, Image SLES12-SP5-Azure-BYOS, … (84 product lines)): Known Not Affected 559, Fixed 425, Will Not Fix 5. https://www.suse.com/security/cve/CVE-2017-9229/
ubuntu medium CVE-2017-9229 medium priority: Ubuntu including 4 source packages (libonig, php5, php7.0, php7.1), 25 status rows across 7 suites (artful, bionic, trusty, upstream, xenial, yakkety, zesty): DNE 11, released 6, needs-triage 4, ignored 3, not-affected 1. https://ubuntu.com/security/CVE-2017-9229

Affected software / configurations for CVE-2017-9229

Vendor Product Version Raw CPE
oniguruma_project oniguruma 6.2.0 cpe:2.3:a:oniguruma_project:oniguruma:6.2.0:*:*:*:*:*:*:*
php php <= 7.1.5 cpe:2.3:a:php:php:*:*:*:*:*:oniguruma-mod:*:*
ruby-lang ruby <= 2.4.1 cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:oniguruma-mod:*:*
php php >= 5.6.0, < 5.6.31 cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
php php >= 7.0.0, < 7.0.21 cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
php php >= 7.1.0, < 7.1.7 cpe:2.3:a:php:php:*:*:*:*:*:*:*:*

References for CVE-2017-9229

cvelogic Threat Intelligence