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- Snyk ID SNYK-DEBIAN11-CURL-529553
- published 31 Oct 2017
- disclosed 31 Oct 2017
Introduced: 31 Oct 2017CVE-2017-1000257 Open this link in a new tab
How to fix?
curl to version 7.56.1-1 or higher.
Note: Versions mentioned in the description apply only to the upstream
curl package and not the
curl package as distributed by
How to fix? for
Debian:11 relevant fixed versions and status.
An IMAP FETCH response line indicates the size of the returned data, in number of bytes. When that response says the data is zero bytes, libcurl would pass on that (non-existing) data with a pointer and the size (zero) to the deliver-data function. libcurl's deliver-data function treats zero as a magic number and invokes strlen() on the data to figure out the length. The strlen() is called on a heap based buffer that might not be zero terminated so libcurl might read beyond the end of it into whatever memory lies after (or just crash) and then deliver that to the application as if it was actually downloaded.