CVE-2018-1000005 - log back

CVE-2018-1000005 created at 25 Sep 2019 19:31:40
Severity
+ Medium
Remote
+ Remote
Type
+ Denial of service
Description
+ libcurl contains an out bounds read in code handling HTTP/2 trailers. It was reported 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 associated 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 the libcurl callback. This might 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.
References
+ https://curl.haxx.se/docs/adv_2018-824a.html
+ https://github.com/curl/curl/commit/fa3dbb9a147488a2943bda809c66fc497efe06cb
Notes