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CVE Record

CVE-2017-11362: In PHP 7.x before 7.0.21 and 7.1.x before 7.1.7, ext/intl/msgformat/msgformat_parse.c does not restrict the...

In PHP 7.x before 7.0.21 and 7.1.x before 7.1.7, ext/intl/msgformat/msgformat_parse.c does not restrict the locale length, which allows remote attackers to cause a denial of service (stack-based buffer overflow and application crash) or possibly have unspecified other impact within International Components for Unicode (ICU) for C/C++ via a long first argument to the msgfmt_parse_message function.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2017-11362 is a PHP intl extension flaw where an overly long locale value can crash an affected PHP application. The cited record describes denial of service and only unspecified possible other impact, so business urgency depends on whether old PHP 7.0 or 7.1 runtimes remain exposed to untrusted input.

Executive priority

Treat this as a targeted legacy-platform cleanup item, not an emergency based on the supplied evidence. Prioritize internet-facing PHP applications and vendor-managed platforms still running affected PHP builds, because a crashable service can still cause customer-facing downtime.

Technical view

PHP 7.x before 7.0.21 and 7.1.x before 7.1.7 fail to restrict locale length in ext/intl/msgformat/msgformat_parse.c. A long first argument to msgfmt_parse_message can trigger a stack-based buffer overflow in ICU-related handling, causing an application crash and possible unspecified other impact.

Likely exposure

Exposure is most likely on legacy PHP 7.0 or 7.1 systems using the intl extension where msgfmt_parse_message accepts user-influenced locale values. The source bundle does not identify specific applications, distributions, or appliances beyond cited vendor advisories.

Exploitation context

The bundle does not show CISA KEV listing or cited evidence of active exploitation. The described impact is remotely triggerable denial of service, with possible unspecified other impact, but the sources provided do not substantiate code execution or weaponized exploitation.

Researcher notes

The provided evidence supports a locale-length validation flaw in PHP intl msgformat parsing with stack overflow and crash impact. Affected product metadata is incomplete in the bundle, so exposure assessment should rely on PHP version, intl usage, and vendor advisory applicability rather than CPE data.

Mitigation direction

  • Upgrade PHP to 7.0.21, 7.1.7, or vendor-patched packages as applicable.
  • Apply relevant OS or appliance vendor security advisories listed in the source bundle.
  • Reduce exposure of endpoints that pass untrusted locale values into PHP intl parsing.
  • Check current vendor guidance if legacy PHP versions cannot be upgraded.

Validation and detection

  • Inventory PHP runtimes and identify PHP 7.0 before 7.0.21 or 7.1 before 7.1.7.
  • Confirm whether the PHP intl extension is installed and enabled.
  • Review application code for msgfmt_parse_message with user-influenced locale input.
  • Verify vendor package versions against Red Hat, Gentoo, Ubuntu, NetApp, or PHP advisories.
Prepared
Confidence
medium
Sources
7

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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CVE-2017-11362 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
6Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

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