Bug 1479197 (CVE-2017-7781) - CVE-2017-7781 Mozilla: Elliptic curve point addition error when using mixed Jacobian-affine coordinates (MFSA 2017-18)
Summary: CVE-2017-7781 Mozilla: Elliptic curve point addition error when using mixed J...
Status: CLOSED WONTFIX
Alias: CVE-2017-7781
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: impact=moderate,public=20170808,repor...
Keywords: Reopened, Security
Depends On: 1485769
Blocks: 1484228
TreeView+ depends on / blocked
 
Reported: 2017-08-08 06:38 UTC by Doran Moppert
Modified: 2019-06-08 22:12 UTC (History)
9 users (show)

(edit)
Clone Of:
(edit)
Last Closed: 2017-08-28 04:02:52 UTC


Attachments (Terms of Use)

Description Doran Moppert 2017-08-08 06:38:04 UTC
An error in the elliptic curve point addition algorithm that uses mixed Jacobian-affine coordinates where it can yield a result `POINT_AT_INFINITY` when it should not. A man-in-the-middle attacker could use this to interfere with a connection, resulting in an attacked party computing an incorrect shared secret.


External Reference:

https://www.mozilla.org/en-US/security/advisories/mfsa2017-18/#CVE-2017-7781


Acknowledgements:

Name: the Mozilla project
Upstream: Antonio Sanso

Comment 1 Tomas Hoger 2017-08-14 09:21:21 UTC
Upstream commit:

https://hg.mozilla.org/projects/nss/rev/6d1f5f958100

Upstream bug report, which is still non-pubic:

https://bugzilla.mozilla.org/show_bug.cgi?id=1352039

Comment 3 Huzaifa S. Sidhpurwala 2017-08-28 04:02:12 UTC
Created nss-softokn tracking bugs for this issue:

Affects: fedora-all [bug 1485769]


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