CVE-2020-17469
An issue was discovered in FNET through 4.6.4.
Published 5 y ago · modified 4 mo ago · JSON
Summary
An issue was discovered in FNET through 4.6.4. The code for IPv6 fragment reassembly tries to access a previous fragment starting from a network incoming fragment that still doesn't have a reference to the previous one (which supposedly resides in the reassembly list). When faced with an incoming fragment that belongs to a non-empty fragment list, IPv6 reassembly must check that there are no empty holes between the fragments: this leads to an uninitialized pointer dereference in _fnet_ip6_reassembly in fnet_ip6.c, and causes Denial-of-Service.
Exploit prediction (EPSS)
2.99% probability of exploitation in the next 30 days, higher than 87% of all scored CVEs.
CVSS scores
| Assigned by | Version | Score | Vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
Classification
- Weakness
- CWE-824 Access of Uninitialized Pointer
References
- kb.cert.org /vuls/id/815128 · x_refsource_MISC, x_transferred
- us-cert.cisa.gov /ics/advisories/icsa-20-343-01 · x_refsource_MISC, x_transferred
- fnet.sourceforge.net /manual/fnet_history.html · x_refsource_CONFIRM, x_transferred
Sources
- CVE List: CVE-2020-17469
- NVD: CVE-2020-17469
vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.