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Out-of-bounds Read The advisory has been revoked - it doesn't affect any version of package curl  (opens in a new tab)

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EPSS
4.56% (92nd percentile)

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  • Snyk IDSNYK-UBUNTU1204-CURL-615028
  • published24 Jan 2018
  • disclosed24 Jan 2018
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Introduced: 24 Jan 2018

CVE-2018-1000005  (opens in a new tab)
CWE-125  (opens in a new tab)

Amendment

The Ubuntu security team deemed this advisory irrelevant for Ubuntu:12.04.

NVD Description

Note: Versions mentioned in the description apply only to the upstream curl package and not the curl package as distributed by Ubuntu.

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.