Use After Free in FreeBSD
CVE-2020-7457
In FreeBSD 12.1-STABLE before r359565, 12.1-RELEASE before p7, 11.4-STABLE before r362975, 11.4-RELEASE before p1, and 11.3-RELEASE before p11, missing synchronization in the IPV6_2292PKTOPTIONS socket option set handler contained a race condition allowing a malicious application to modify memory after being freed, possibly resulting in code execution.
Vulnerability class: Race Condition
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.331 (98.3th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 98.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.331 · newest: 0.331 · change: 0.000
Affected products
- FreeBSD — versions 11.3, 11.4, 12.1
- FreeBSD — versions FreeBSD 12.1-RELEASE before p7, 11.4-RELEASE before p1, 11.3-RELEASE before p11
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security.FreeBSD.org/advisories/FreeBSD-SA-20:20.ipv6.asc (Patch, Vendor Advisory)
- security.netapp.com/advisory/ntap-20200724-0002/ (Third Party Advisory)
- packetstormsecurity.com/files/158695/FreeBSD-ip6_setpktopt-Use-After-Free-Privi… (Exploit, VDB Entry, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-7457?
- CVE-2020-7457 is a high-severity vulnerability in FreeBSD, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 8.1/10. Published 2020-07-09.
- How severe is CVE-2020-7457?
- High severity. CVSS v3 base score is 8.1 out of 10.
- Is CVE-2020-7457 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.