Vulnerability in Oracle Communications Cloud Native Core Automated Test Suite
CVE-2021-29921
In Python before 3,9,5, the ipaddress library mishandles leading zero characters in the octets of an IP address string. This (in some situations) allows attackers to bypass access control that is based on IP addresses.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.068 (94.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 94.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.069 · newest: 0.068 · change: -0.001
Affected products
- Oracle Communications Cloud Native Core Automated Test Suite — versions 1.8.0
- Oracle Communications Cloud Native Core Binding Support Function — versions 1.11.0
- Oracle Communications Cloud Native Core Network Slice Selection Function — versions 1.8.0
- Oracle Graalvm — versions 20.3.2, 21.1.0
- Oracle Zfs Storage Appliance Kit — versions 8.8
- Python
Public proof-of-concept exploits
References
- github.com/sickcodes (Third Party Advisory)
- docs.python.org/3/library/ipaddress.html (Vendor Advisory)
- github.com/python/cpython/blob/63298930fb531ba2bb4f23bc3b915dbf1e17e9e1/Misc/NE… (Third Party Advisory)
- sick.codes/sick-2021-014 (Exploit, Third Party Advisory)
- www.oracle.com//security-alerts/cpujul2021.html (Patch, Third Party Advisory)
- github.com/sickcodes/security/blob/master/advisories/SICK-2021-014.md (Exploit, Third Party Advisory)
- python-security.readthedocs.io/vuln/ipaddress-ipv4-leading-zeros.html (Vendor Advisory)
- bugs.python.org/issue36384 (Patch, Issue Tracking, Vendor Advisory)
- github.com/python/cpython/pull/12577 (Patch, Third Party Advisory)
- github.com/python/cpython/pull/25099 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-29921?
- CVE-2021-29921 is a critical-severity vulnerability in Oracle Communications Cloud Native Core Automated Test Suite. CVSS score: 9.8/10. Published 2021-05-06.
- How severe is CVE-2021-29921?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-29921 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.