Bug 1595602 (CVE-2018-1000520) - CVE-2018-1000520 mbedtls: Allows incorrectly signed certificate
Summary: CVE-2018-1000520 mbedtls: Allows incorrectly signed certificate
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2018-1000520
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1595603 1595604
Blocks:
TreeView+ depends on / blocked
 
Reported: 2018-06-27 08:16 UTC by Andrej Nemec
Modified: 2019-09-29 14:43 UTC (History)
2 users (show)

Fixed In Version:
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Last Closed: 2019-04-09 11:48:24 UTC
Embargoed:

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Description Andrej Nemec 2018-06-27 08:16:01 UTC 
When the negotiated ciphersuite is of the type TLS-ECDH-RSA-* (ECDH key exchange + RSA signed certificate), ECDSA signed certificates are accepted, which means that the ciphersuite technically becomes TLS-ECDH-ECDSA.

Upstream issue:

https://github.com/ARMmbed/mbedtls/issues/1561
Comment 1 Andrej Nemec 2018-06-27 08:16:27 UTC 
Created mbedtls tracking bugs for this issue:

Affects: epel-all [bug 1595604]
Affects: fedora-all [bug 1595603]
Comment 2 Morten Stevens 2019-03-28 13:56:42 UTC 
@Andrej

I think we should close this. See: https://github.com/ARMmbed/mbedtls/issues/1561#issuecomment-424756997
Comment 3 Andrej Nemec 2019-04-09 11:48:24 UTC 
(In reply to Morten Stevens from comment #2)
> @Andrej
> 
> I think we should close this. See:
> https://github.com/ARMmbed/mbedtls/issues/1561#issuecomment-424756997

I agree with the upstream analysis, it seems this was classified as a regular bug.
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