HOME VULNERABILITIESCVE-2019-9637

HIGH

CVE-2019-9637

CWE-264Published: March 9, 2019· Updated: Jun 17, 2026

7.5

CVSS v3.1

Official Description

An issue was discovered in PHP before 7.1.27, 7.2.x before 7.2.16, and 7.3.x before 7.3.3. Due to the way rename() across filesystems is implemented, it is possible that file being renamed is briefly available with wrong permissions while the rename is ongoing, thus enabling unauthorized users to access the data.

Technical Analysis

CVE-2019-9637 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected Vendors & Products

Canonical1 product(s)

ubuntu linux

Debian1 product(s)

debian linux

netapp1 product(s)

storage automation store

openSUSE1 product(s)

leap

PHP1 product(s)

php

Source: NVD CPE · 10 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://bugs.php.net/bug.php?id=77630

PATCHhttps://bugs.php.net/bug.php?id=77630

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2019-04/msg00104.html

ADVISORYhttps://lists.debian.org/debian-lts-announce/2019/03/msg00043.html

ADVISORYhttps://security.netapp.com/advisory/ntap-20190502-0007/

ADVISORYhttps://support.f5.com/csp/article/K53825211

ADVISORYhttps://usn.ubuntu.com/3922-1/

ADVISORYhttps://usn.ubuntu.com/3922-2/

ADVISORYhttps://usn.ubuntu.com/3922-3/

ADVISORYhttps://www.debian.org/security/2019/dsa-4403

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2019-04/msg00104.html

ADVISORYhttps://lists.debian.org/debian-lts-announce/2019/03/msg00043.html

ADVISORYhttps://security.netapp.com/advisory/ntap-20190502-0007/

ADVISORYhttps://support.f5.com/csp/article/K53825211

ADVISORYhttps://usn.ubuntu.com/3922-1/

ADVISORYhttps://usn.ubuntu.com/3922-2/

ADVISORYhttps://usn.ubuntu.com/3922-3/

ADVISORYhttps://www.debian.org/security/2019/dsa-4403

All References (30)

→

http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00104.htmlMailing List · Third Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00012.html

→

http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00041.html

→

http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00044.html

→

https://access.redhat.com/errata/RHSA-2019:2519

→

https://access.redhat.com/errata/RHSA-2019:3299

→

https://bugs.php.net/bug.php?id=77630Issue Tracking · Patch · Vendor Advisory

→

https://lists.debian.org/debian-lts-announce/2019/03/msg00043.htmlMailing List · Third Party Advisory

→

https://security.netapp.com/advisory/ntap-20190502-0007/Third Party Advisory

→

https://support.f5.com/csp/article/K53825211Third Party Advisory

→

https://usn.ubuntu.com/3922-1/Third Party Advisory

→

https://usn.ubuntu.com/3922-2/Third Party Advisory

→

https://usn.ubuntu.com/3922-3/Third Party Advisory

→

https://www.debian.org/security/2019/dsa-4403Third Party Advisory

→

https://www.tenable.com/security/tns-2019-07

Quick Facts

CVE IDCVE-2019-9637

CVSS Score7.5 / 10

SeverityHIGH

WeaknessCWE-264

CISA KEVNo

Affected5 vendor(s)

PublishedMar 9, 2019

Related CVEs (CWE-264)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2019-9637 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.

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