Vulnerability in NetApp Clustered Data Ontap
CVE-2021-21707
In PHP versions 7.3.x below 7.3.33, 7.4.x below 7.4.26 and 8.0.x below 8.0.13, certain XML parsing functions, like simplexml_load_file(), URL-decode the filename passed to them. If that filename contains URL-encoded NUL character, this may cause the function to interpret this as the end of the filename, thus interpreting the filename differently from what the user intended, which may lead it to reading a different file than intended.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.260 (97.9th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 97.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.260 · newest: 0.260 · change: 0.000
Affected products
- NetApp Clustered Data Ontap
- PHP
- PHP Group — versions 7.3.x, 7.4.x, 8.0.X
- Tenable Tenable.sc
- Debian Linux — versions 10.0, 11.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugs.php.net/bug.php (Exploit, Patch, Release Notes, Issue Tracking, Vendor Advisory)
- security.netapp.com/advisory/ntap-20211223-0005/ (Third Party Advisory)
- www.debian.org/security/2022/dsa-5082 (vendor-advisory, Third Party Advisory)
- www.tenable.com/security/tns-2022-09 (Patch, Third Party Advisory, Release Notes)
- lists.debian.org/debian-lts-announce/2022/12/msg00030.html (mailing-list, Mailing List, Issue Tracking)
Frequently asked questions
- What is CVE-2021-21707?
- CVE-2021-21707 is a medium-severity vulnerability in NetApp Clustered Data Ontap, classified under CWE-159. CVSS score: 5.3/10. Published 2021-11-29.
- How severe is CVE-2021-21707?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2021-21707 known to be exploited?
- 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.