Bug 1238326 – CVE-2015-3278 nss_compat_ossl: incorrect multi-keyword mode cipherstring parsing

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Bug 1238326 - (CVE-2015-3278) CVE-2015-3278 nss_compat_ossl: incorrect multi-keyword mode cipherstring parsing

Summary:	CVE-2015-3278 nss_compat_ossl: incorrect multi-keyword mode cipherstring parsing

Status:	CLOSED WONTFIX

Aliases:	CVE-2015-3278

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=moderate,public=20150715,repor...
Keywords:	Security

Depends On:	1243519
Blocks:	1238331
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Reported:	2015-07-01 11:29 EDT by Vasyl Kaigorodov
Modified:	2015-08-14 05:28 EDT (History)
CC List:	5 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2015-08-14 05:28:35 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
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Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
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Description Vasyl Kaigorodov 2015-07-01 11:29:41 EDT

It was reported that cipherstring parsing code incorrectly implements the multi-keyword mode in nss_compat_ossl.

As a consequence anyone using a combination like

  ECDH+SHA

will not get the expected set of ciphers

  ECDH-RSA-RC4-SHA
  ECDH-RSA-DES-CBC3-SHA
  ECDH-RSA-AES128-SHA
  ECDH-RSA-AES256-SHA
  ECDH-ECDSA-RC4-SHA
  ECDH-ECDSA-DES-CBC3-SHA
  ECDH-ECDSA-AES128-SHA
  ECDH-ECDSA-AES256-SHA
  ECDHE-RSA-RC4-SHA
  ECDHE-RSA-DES-CBC3-SHA
  ECDHE-RSA-AES128-SHA
  ECDHE-RSA-AES256-SHA
  ECDHE-ECDSA-RC4-SHA
  ECDHE-ECDSA-DES-CBC3-SHA
  ECDHE-ECDSA-AES128-SHA
  ECDHE-ECDSA-AES256-SHA

but instead will match

  DES-CBC-SHA
  DES-CBC3-SHA
  RC4-SHA
  EDH-RSA-DES-CBC-SHA
  EDH-RSA-DES-CBC3-SHA
  EDH-DSS-DES-CBC-SHA
  EDH-DSS-DES-CBC3-SHA
  EXP1024-DES-CBC-SHA
  EXP1024-RC4-SHA
  SEED-SHA
  AES128-SHA
  AES256-SHA
  CAMELLIA256-SHA
  CAMELLIA128-SHA
  DHE-RSA-AES128-SHA
  DHE-RSA-AES256-SHA
  DHE-RSA-CAMELLIA128-SHA
  DHE-RSA-CAMELLIA256-SHA
  DHE-DSS-RC4-SHA
  DHE-DSS-AES128-SHA
  DHE-DSS-AES256-SHA
  DHE-DSS-CAMELLIA128-SHA
  DHE-DSS-CAMELLIA256-SHA
  ECDH-RSA-RC4-SHA
  ECDH-RSA-DES-CBC3-SHA
  ECDH-RSA-AES128-SHA
  ECDH-RSA-AES256-SHA
  ECDH-ECDSA-RC4-SHA
  ECDH-ECDSA-DES-CBC3-SHA
  ECDH-ECDSA-AES128-SHA
  ECDH-ECDSA-AES256-SHA
  ECDHE-RSA-RC4-SHA
  ECDHE-RSA-DES-CBC3-SHA
  ECDHE-RSA-AES128-SHA
  ECDHE-RSA-AES256-SHA
  ECDHE-ECDSA-RC4-SHA
  ECDHE-ECDSA-DES-CBC3-SHA
  ECDHE-ECDSA-AES128-SHA
  ECDHE-ECDSA-AES256-SHA

Acknowledgements:

Red Hat would like to thank Martin Poole of Software Maintenance Engineering group for reporting this issue.

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