Several vulnerabilities were discovered in OpenSSL :

CVE-2016-2177

Guido Vranken discovered that OpenSSL uses undefined pointer arithmetic. Additional information can be found at https://www.openssl.org/blog/blog/2016/06/27/undefined-pointer-arithme tic/

CVE-2016-2178

Cesar Pereida, Billy Brumley and Yuval Yarom discovered a timing leak in the DSA code.

CVE-2016-2179 / CVE-2016-2181

Quan Luo and the OCAP audit team discovered denial of service vulnerabilities in DTLS.

CVE-2016-2180 / CVE-2016-2182 / CVE-2016-6303

Shi Lei discovered an out-of-bounds memory read in TS_OBJ_print_bio() and an out-of-bounds write in BN_bn2dec() and MDC2_Update().

CVE-2016-2183

DES-based cipher suites are demoted from the HIGH group to MEDIUM as a mitigation for the SWEET32 attack.

CVE-2016-6302

Shi Lei discovered that the use of SHA512 in TLS session tickets is susceptible to denial of service.

CVE-2016-6304

Shi Lei discovered that excessively large OCSP status request may result in denial of service via memory exhaustion.

CVE-2016-6306

Shi Lei discovered that missing message length validation when parsing certificates may potentially result in denial of service.

For Debian 7 'Wheezy', these problems have been fixed in version 1.0.1t-1+deb7u1.

We recommend that you upgrade your openssl and libssl1.0.0 packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update for openssl fixes the following issues: OpenSSL Security Advisory [22 Sep 2016] (bsc#999665) Severity: High

  - OCSP Status Request extension unbounded memory growth     (CVE-2016-6304) (bsc#999666) Severity: Low

  - Pointer arithmetic undefined behavior (CVE-2016-2177)     (bsc#982575)

  - Constant time flag not preserved in DSA signing     (CVE-2016-2178) (bsc#983249)

  - DTLS buffered message DoS (CVE-2016-2179) (bsc#994844)

  - DTLS replay protection DoS (CVE-2016-2181) (bsc#994749)

  - OOB write in BN_bn2dec() (CVE-2016-2182) (bsc#993819)

  - Birthday attack against 64-bit block ciphers (SWEET32)     (CVE-2016-2183) (bsc#995359)

  - Malformed SHA512 ticket DoS (CVE-2016-6302) (bsc#995324)

  - OOB write in MDC2_Update() (CVE-2016-6303) (bsc#995377)

  - Certificate message OOB reads (CVE-2016-6306)     (bsc#999668) More information can be found on:
    https://www.openssl.org/news/secadv/20160922.txt Bugs     fixed :

  - Update expired S/MIME certs (bsc#979475)

  - Fix crash in print_notice (bsc#998190)

  - Resume reading from /dev/urandom when interrupted by a     signal (bsc#995075)

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the openssl packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - OpenSSL through 1.0.2h incorrectly uses pointer     arithmetic for heap-buffer boundary checks, which might     allow remote attackers to cause a denial of service     (integer overflow and application crash) or possibly     have unspecified other impact by leveraging unexpected     malloc behavior, related to s3_srvr.c, ssl_sess.c, and     t1_lib.c.(CVE-2016-2177)

  - The dsa_sign_setup function in crypto/dsa/dsa_ossl.c in     OpenSSL through 1.0.2h does not properly ensure the use     of constant-time operations, which makes it easier for     local users to discover a DSA private key via a timing     side-channel attack.(CVE-2016-2178)

  - The DTLS implementation in OpenSSL before 1.1.0 does     not properly restrict the lifetime of queue entries     associated with unused out-of-order messages, which     allows remote attackers to cause a denial of service     (memory consumption) by maintaining many crafted DTLS     sessions simultaneously, related to d1_lib.c,     statem_dtls.c, statem_lib.c, and     statem_srvr.c.(CVE-2016-2179)

  - The TS_OBJ_print_bio function in crypto/ts/ts_lib.c in     the X.509 Public Key Infrastructure Time-Stamp Protocol     (TSP) implementation in OpenSSL through 1.0.2h allows     remote attackers to cause a denial of service     (out-of-bounds read and application crash) via a     crafted time-stamp file that is mishandled by the     'openssl ts' command.(CVE-2016-2180)

  - The Anti-Replay feature in the DTLS implementation in     OpenSSL before 1.1.0 mishandles early use of a new     epoch number in conjunction with a large sequence     number, which allows remote attackers to cause a denial     of service (false-positive packet drops) via spoofed     DTLS records, related to rec_layer_d1.c and     ssl3_record.c.(CVE-2016-2181)

  - The BN_bn2dec function in crypto/bn/bn_print.c in     OpenSSL before 1.1.0 does not properly validate     division results, which allows remote attackers to     cause a denial of service (out-of-bounds write and     application crash) or possibly have unspecified other     impact via unknown vectors.(CVE-2016-2182)

  - The tls_decrypt_ticket function in ssl/t1_lib.c in     OpenSSL before 1.1.0 does not consider the HMAC size     during validation of the ticket length, which allows     remote attackers to cause a denial of service via a     ticket that is too short.(CVE-2016-6302)

  - Multiple memory leaks in t1_lib.c in OpenSSL before     1.0.1u, 1.0.2 before 1.0.2i, and 1.1.0 before 1.1.0a     allow remote attackers to cause a denial of service     (memory consumption) via large OCSP Status Request     extensions.(CVE-2016-6304)

  - The certificate parser in OpenSSL before 1.0.1u and     1.0.2 before 1.0.2i might allow remote attackers to     cause a denial of service (out-of-bounds read) via     crafted certificate operations, related to s3_clnt.c     and s3_srvr.c.(CVE-2016-6306)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Published	Updated	Severity
93690	Debian DLA-637-1 : openssl security update	Nessus	Debian Local Security Checks	9/26/2016	1/23/2026	critical
93893	SUSE SLES11 Security Update : openssl (SUSE-SU-2016:2458-1)	Nessus	SuSE Local Security Checks	10/6/2016	1/22/2026	critical
99810	EulerOS 2.0 SP1 : openssl (EulerOS-SA-2016-1047)	Nessus	Huawei Local Security Checks	5/1/2017	12/22/2025	critical

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