Out-of-bounds Read in Openwrt
CVE-2019-19945
uhttpd in OpenWrt through 18.06.5 and 19.x through 19.07.0-rc2 has an integer signedness error. This leads to out-of-bounds access to a heap buffer and a subsequent crash. It can be triggered with an HTTP POST request to a CGI script, specifying both "Transfer-Encoding: chunked" and a large negative Content-Length value.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.016 (74.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 74.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000
Affected products
- Openwrt — versions 19.07.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/openwrt/openwrt/commits/master (Patch, Third Party Advisory)
- openwrt.org/advisory/2020-01-13-1 (Vendor Advisory)
Frequently asked questions
- What is CVE-2019-19945?
- CVE-2019-19945 is a high-severity vulnerability in Openwrt, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2020-03-16.
- How severe is CVE-2019-19945?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2019-19945 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.