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Sicherheit: Preisgabe von Informationen in libressl
Aktuelle Meldungen Distributionen
Name: Preisgabe von Informationen in libressl
ID: openSUSE-SU-2018:2592-1
Distribution: SUSE
Plattformen: SUSE openSUSE Leap 15.0
Datum: Mo, 3. September 2018, 16:36
Referenzen: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12434
Applikationen: LibreSSL

Originalnachricht

   openSUSE Security Update: Security update for libressl
______________________________________________________________________________

Announcement ID: openSUSE-SU-2018:2592-1
Rating: moderate
References: #1097779
Cross-References: CVE-2018-12434
Affected Products:
openSUSE Leap 15.0
______________________________________________________________________________

An update that fixes one vulnerability is now available.

Description:

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



Package List:

- openSUSE Leap 15.0 (i586 x86_64):

libcrypto43-2.8.0-lp150.2.3.1
libcrypto43-debuginfo-2.8.0-lp150.2.3.1
libressl-2.8.0-lp150.2.3.1
libressl-debuginfo-2.8.0-lp150.2.3.1
libressl-debugsource-2.8.0-lp150.2.3.1
libressl-devel-2.8.0-lp150.2.3.1
libssl45-2.8.0-lp150.2.3.1
libssl45-debuginfo-2.8.0-lp150.2.3.1
libtls17-2.8.0-lp150.2.3.1
libtls17-debuginfo-2.8.0-lp150.2.3.1

- openSUSE Leap 15.0 (noarch):

libressl-devel-doc-2.8.0-lp150.2.3.1

- openSUSE Leap 15.0 (x86_64):

libcrypto43-32bit-2.8.0-lp150.2.3.1
libcrypto43-32bit-debuginfo-2.8.0-lp150.2.3.1
libressl-devel-32bit-2.8.0-lp150.2.3.1
libssl45-32bit-2.8.0-lp150.2.3.1
libssl45-32bit-debuginfo-2.8.0-lp150.2.3.1
libtls17-32bit-2.8.0-lp150.2.3.1
libtls17-32bit-debuginfo-2.8.0-lp150.2.3.1


References:

https://www.suse.com/security/cve/CVE-2018-12434.html
https://bugzilla.suse.com/1097779

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