Topic

An update for openssl is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library.

Security Fix(es):

• openssl: ROHNP - Key Extraction Side Channel in Multiple Crypto Libraries (CVE-2018-0495)
• openssl: Malicious server can send large prime to client during DH(E) TLS handshake causing the client to hang (CVE-2018-0732)
• openssl: Handling of crafted recursive ASN.1 structures can cause a stack overflow and resulting denial of service (CVE-2018-0739)
• openssl: Malformed X.509 IPAdressFamily could cause OOB read (CVE-2017-3735)
• openssl: RSA key generation cache timing vulnerability in crypto/rsa/rsa_gen.c allows attackers to recover private keys (CVE-2018-0737)

For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.6 Release Notes linked from the References section.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

For the update to take effect, all services linked to the OpenSSL library must be restarted, or the system rebooted.

Affected Products

• Red Hat Enterprise Linux Server 7 x86_64
• Red Hat Enterprise Linux Workstation 7 x86_64
• Red Hat Enterprise Linux Desktop 7 x86_64
• Red Hat Enterprise Linux for IBM z Systems 7 s390x
• Red Hat Enterprise Linux for Power, big endian 7 ppc64
• Red Hat Enterprise Linux for Scientific Computing 7 x86_64
• Red Hat Enterprise Linux for Power, little endian 7 ppc64le
• Red Hat Enterprise Linux for ARM 64 7 aarch64
• Red Hat Enterprise Linux for Power 9 7 ppc64le
• Red Hat Enterprise Linux for IBM System z (Structure A) 7 s390x

Fixes

• BZ - 1486144 - CVE-2017-3735 openssl: Malformed X.509 IPAdressFamily could cause OOB read
• BZ - 1548401 - modify X509_NAME comparison function to be case sensitive for CA name lists in SSL
• BZ - 1561266 - CVE-2018-0739 openssl: Handling of crafted recursive ASN.1 structures can cause a stack overflow and resulting denial of service
• BZ - 1568253 - CVE-2018-0737 openssl: RSA key generation cache timing vulnerability in crypto/rsa/rsa_gen.c allows attackers to recover private keys
• BZ - 1585004 - ppc64le opensslconf.h is incompatible with swig
• BZ - 1591100 - CVE-2018-0732 openssl: Malicious server can send large prime to client during DH(E) TLS handshake causing the client to hang
• BZ - 1591163 - CVE-2018-0495 openssl: ROHNP - Key Extraction Side Channel in Multiple Crypto Libraries
• BZ - 1603597 - Confusing error message when asking for invalid DSA parameter sizes in FIPS mode

CVEs

• CVE-2017-3735
• CVE-2018-0495
• CVE-2018-0732
• CVE-2018-0737
• CVE-2018-0739

References

• https://access.redhat.com/security/updates/classification/#moderate
• https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/7.6_release_notes/index