CVE-2018-1000005
Severity CVSS v4.0:
Pending analysis
Type:
CWE-125
Out-of-bounds Read
Publication date:
24/01/2018
Last modified:
18/06/2019
Description
libcurl 7.49.0 to and including 7.57.0 contains an out bounds read in code handling HTTP/2 trailers. It was reported (https://github.com/curl/curl/pull/2231) that reading an HTTP/2 trailer could mess up future trailers since the stored size was one byte less than required. The problem is that the code that creates HTTP/1-like headers from the HTTP/2 trailer data once appended a string like `:` to the target buffer, while this was recently changed to `: ` (a space was added after the colon) but the following math wasn't updated correspondingly. When accessed, the data is read out of bounds and causes either a crash or that the (too large) data gets passed to client write. This could lead to a denial-of-service situation or an information disclosure if someone has a service that echoes back or uses the trailers for something.
Impact
Base Score 3.x
9.10
Severity 3.x
CRITICAL
Base Score 2.0
6.40
Severity 2.0
MEDIUM
Vulnerable products and versions
| CPE | From | Up to |
|---|---|---|
| cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:* | 7.49.0 (including) | 7.57.0 (including) |
| cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* | ||
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | ||
| cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* | ||
| cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* | ||
| cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:* |
To consult the complete list of CPE names with products and versions, see this page