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Bug 1408385 - (CVE-2016-9594) CVE-2016-9594 curl: Unitialized random
CVE-2016-9594 curl: Unitialized random
Status: CLOSED NOTABUG
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20161223,repor...
: Security
Depends On:
Blocks:
  Show dependency treegraph
 
Reported: 2016-12-23 03:33 EST by Andrej Nemec
Modified: 2018-01-11 07:30 EST (History)
28 users (show)

See Also:
Fixed In Version: curl 7.52.1
Doc Type: If docs needed, set a value
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Last Closed: 2016-12-23 03:34:22 EST
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Description Andrej Nemec 2016-12-23 03:33:06 EST
libcurl's (new) internal function that returns a good 32bit random value was
implemented poorly and overwrote the pointer instead of writing the value into
the buffer the pointer pointed to.

This random value is used to generate nonces for Digest and NTLM
authentication, for generating boundary strings in HTTP formposts and
more. Having a weak or virtually non-existent random there makes these
operations vulnerable.

This function is brand new in 7.52.0

External References:

https://curl.haxx.se/docs/adv_20161223.html

Upstream patch:

https://curl.haxx.se/CVE-2016-9594.patch
Comment 1 Andrej Nemec 2016-12-23 03:33:34 EST
Acknowledgments:

Name: Daniel Stenberg
Upstream: Kamil Dudka (Red Hat)
Comment 2 Andrej Nemec 2016-12-23 03:34:22 EST
Vulnerable version is not shipped anywhere across our products.

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