Buffer overflow in PHP
CVE-2019-11043
In PHP versions 7.1.x below 7.1.33, 7.2.x below 7.2.24 and 7.3.x below 7.3.11 in certain configurations of FPM setup it is possible to cause FPM module to write past allocated buffers into the space reserved for FCGI protocol data, thus opening the possibility of remote code execution.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.7 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.997 (100.0th percentile), scored .
Very high probability of exploitation in the next 30 days — among the top 0.1% most-likely-to-be-exploited CVEs. 100th percentile — 100.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.998 · newest: 0.997 · change: -0.000
Affected products
- PHP — versions 7.1.x, 7.2.x, 7.3.x
- Tenable Tenable.sc
- Canonical Ubuntu Linux — versions 12.04, 14.04, 16.04
- Debian Linux — versions 9.0, 10.0
- Fedoraproject Fedora — versions 29, 30, 31
- Red Hat Enterprise Linux — versions 8.0
- Red Hat Enterprise Linux Desktop — versions 6.0, 7.0
- Red Hat Enterprise Linux Eus — versions 7.7, 8.1, 8.2
- Red Hat Enterprise Linux Eus Compute Node — versions 7.7
- Red Hat Enterprise Linux For Arm 64 — versions 8.0_aarch64
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply updates per vendor instructions.
Known ransomware campaign use: yes.
Public proof-of-concept exploits
References
- github.com/neex/phuip-fpizdam (Exploit, Third Party Advisory)
- bugs.php.net/bug.php (Exploit, Patch, Issue Tracking, Vendor Advisory)
- usn.ubuntu.com/4166-1/ (vendor-advisory, Third Party Advisory)
- www.debian.org/security/2019/dsa-4552 (vendor-advisory, Mailing List, Third Party Advisory)
- www.debian.org/security/2019/dsa-4553 (vendor-advisory, Mailing List, Third Party Advisory)
- usn.ubuntu.com/4166-2/ (vendor-advisory, Third Party Advisory)
- support.f5.com/csp/article/K75408500 (Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory, Mailing List, Third Party Advisory)
- security.netapp.com/advisory/ntap-20191031-0003/ (Third Party Advisory)
- access.redhat.com/errata/RHSA-2019:3286 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-11043?
- CVE-2019-11043 is a high-severity vulnerability in PHP, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.7/10. Published 2019-10-28.
- How severe is CVE-2019-11043?
- High severity. CVSS v3 base score is 8.7 out of 10.
- Is CVE-2019-11043 known to be exploited?
- Yes. CVE-2019-11043 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-25), indicating it is being actively exploited. 149 public proof-of-concept repositories are indexed.