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Test ID:1.3.6.1.4.1.25623.1.0.852047
Category:SuSE Local Security Checks
Title:SuSE Update for libressl openSUSE-SU-2018:2592-1 (libressl)
Summary:The remote host is missing an update for the 'libressl'; package(s) announced via the openSUSE-SU-2018:2592_1 advisory.
Description:Summary:
The remote host is missing an update for the 'libressl'
package(s) announced via the openSUSE-SU-2018:2592_1 advisory.

Vulnerability Insight:
This update for libressl to version 2.8.0 fixes the following issues:

Security issues fixed:

- CVE-2018-12434: Avoid a timing side-channel leak when generating DSA and
ECDSA signatures. (boo#1097779)

- Reject excessively large primes in DH key generation.

Other bugs fixed:

- Fixed a pair of 20+ year-old bugs in X509_NAME_add_entry.

- Tighten up checks for various X509_VERIFY_PARAM functions, 'poisoning'
parameters so that an unverified certificate cannot be used if it fails
verification.

- Fixed a potential memory leak on failure in ASN1_item_digest.

- Fixed a potential memory alignment crash in asn1_item_combine_free.

- Removed unused SSL3_FLAGS_DELAY_CLIENT_FINISHED and
SSL3_FLAGS_POP_BUFFER flags in write path, simplifying IO paths.

- Removed SSL_OP_TLS_ROLLBACK_BUG buggy client workarounds.

- Added const annotations to many existing APIs from OpenSSL, making
interoperability easier for downstream applications.

- Added a missing bounds check in c2i_ASN1_BIT_STRING.

- Removed three remaining single DES cipher suites.

- Fixed a potential leak/incorrect return value in DSA signature
generation.

- Added a blinding value when generating DSA and ECDSA signatures, in
order to reduce the possibility of a side-channel attack leaking the
private key.

- Added ECC constant time scalar multiplication support.

- Revised the implementation of RSASSA-PKCS1-v1_5 to match the
specification in RFC 8017.


Patch Instructions:

To install this openSUSE Security Update use the SUSE recommended
installation methods
like YaST online_update or 'zypper patch'.

Alternatively you can run the command listed for your product:

- openSUSE Leap 15.0:

zypper in -t patch openSUSE-2018-950=1

Affected Software/OS:
libressl on openSUSE Leap 15.0.

Solution:
Please install the updated package(s).

CVSS Score:
1.9

CVSS Vector:
AV:L/AC:M/Au:N/C:P/I:N/A:N

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2018-12434
CopyrightCopyright (C) 2018 Greenbone Networks GmbH

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