Buffer overflow in NetApp Clustered Data Ontap
CVE-2021-21703
In PHP versions 7.3.x up to and including 7.3.31, 7.4.x below 7.4.25 and 8.0.x below 8.0.12, when running PHP FPM SAPI with main FPM daemon process running as root and child worker processes running as lower-privileged users, it is possible for the child processes to access memory shared with the main process and write to it, modifying it in a way that would cause the root process to conduct invalid memory reads and writes, which can be used to escalate privileges from local unprivileged user to the root user.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.014 (71.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 72nd percentile — 71.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: -0.000
Affected products
- NetApp Clustered Data Ontap
- Oracle Communications Diameter Signaling Router
- PHP
- PHP Group — versions 7.3.x, 7.4.x, 8.0.X
- Debian Linux — versions 9.0, 10.0, 11.0
- Fedoraproject Fedora — versions 33, 34, 35
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugs.php.net/bug.php (Exploit, Patch, Issue Tracking, Vendor Advisory)
- www.debian.org/security/2021/dsa-4992 (vendor-advisory, Third Party Advisory)
- www.debian.org/security/2021/dsa-4993 (vendor-advisory, Third Party Advisory)
- www.openwall.com/lists/oss-security/2021/10/26/7 (mailing-list, Patch, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2021/10/msg00021.html (mailing-list, Mailing List, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- www.oracle.com/security-alerts/cpujan2022.html (Patch, Vendor Advisory)
- security.netapp.com/advisory/ntap-20211118-0003/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-21703?
- CVE-2021-21703 is a high-severity vulnerability in NetApp Clustered Data Ontap, classified under Improper Access Control. CVSS score: 7.8/10. Published 2021-10-25.
- How severe is CVE-2021-21703?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2021-21703 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.