Vulnerability Details : 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.
Exploit prediction scoring system (EPSS) score for CVE-2019-19945
Probability of exploitation activity in the next 30 days: 0.12%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 45 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2019-19945
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
NIST |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2019-19945
-
The product reads data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
-
When converting from one data type to another, such as long to integer, data can be omitted or translated in a way that produces unexpected values. If the resulting values are used in a sensitive context, then dangerous behaviors may occur.Assigned by: nvd@nist.gov (Primary)
References for CVE-2019-19945
-
https://github.com/openwrt/openwrt/commits/master
Commits · openwrt/openwrt · GitHubPatch;Third Party Advisory
-
https://openwrt.org/advisory/2020-01-13-1
OpenWrt Project: Security Advisory 2020-01-13-1 - uhttpd invalid data access via HTTP POST request (CVE-2019-19945)Vendor Advisory
Products affected by CVE-2019-19945
- cpe:2.3:o:openwrt:openwrt:*:*:*:*:*:*:*:*
- cpe:2.3:o:openwrt:openwrt:19.07.0:-:*:*:*:*:*:*
- cpe:2.3:o:openwrt:openwrt:19.07.0:rc2:*:*:*:*:*:*
- cpe:2.3:o:openwrt:openwrt:19.07.0:rc1:*:*:*:*:*:*