Security update for libnettle
Announcement ID: | SUSE-RU-2019:0791-1 |
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Rating: | moderate |
References: | |
Affected Products: |
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An update that has one fix can now be installed.
Description:
This update for libnettle to version 3.4.1 fixes the following issues:
Issues addressed and new features:
- Updated to 3.4.1 (fate#327114 and bsc#1129598)
- Fixed a missing break statements in the parsing of PEM input files in pkcs1-conv.
- Fixed a link error on the pss-mgf1-test which was affecting builds without public key support.
- All functions using RSA private keys are now side-channel silent. This applies both to the bignum calculations, which now use GMP's mpn_sec_* family of functions, and the processing of PKCS#1 padding needed for RSA decryption.
- Changes in behavior: The functions rsa_decrypt and rsa_decrypt_tr may now clobber all of the provided message buffer, independent of the actual message length. They are side-channel silent, in that branches and memory accesses don't depend on the validity or length of the message. Side-channel leakage from the caller's use of length and return value may still provide an oracle useable for a Bleichenbacher-style chosen ciphertext attack. Which is why the new function rsa_sec_decrypt is recommended.
Patch Instructions:
To install this SUSE update use the SUSE recommended
installation methods like YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:
-
Basesystem Module 15
zypper in -t patch SUSE-SLE-Module-Basesystem-15-2019-791=1
-
Desktop Applications Module 15
zypper in -t patch SUSE-SLE-Module-Desktop-Applications-15-2019-791=1
Package List:
-
Basesystem Module 15 (aarch64 ppc64le s390x x86_64)
- libnettle6-3.4.1-4.7.3
- libnettle-devel-3.4.1-4.7.3
- libnettle-debugsource-3.4.1-4.7.3
- libnettle6-debuginfo-3.4.1-4.7.3
- libhogweed4-debuginfo-3.4.1-4.7.3
- libhogweed4-3.4.1-4.7.3
-
Desktop Applications Module 15 (x86_64)
- libhogweed4-32bit-3.4.1-4.7.3
- libhogweed4-32bit-debuginfo-3.4.1-4.7.3
- libnettle-debugsource-3.4.1-4.7.3
- libnettle6-32bit-debuginfo-3.4.1-4.7.3
- libnettle6-32bit-3.4.1-4.7.3