Debian DLA-637-1 : openssl security update
High Nessus Plugin ID 93690
SynopsisThe remote Debian host is missing a security update.
DescriptionSeveral vulnerabilities were discovered in OpenSSL :
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/
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().
DES-based cipher suites are demoted from the HIGH group to MEDIUM as a mitigation for the SWEET32 attack.
Shi Lei discovered that the use of SHA512 in TLS session tickets is susceptible to denial of service.
Shi Lei discovered that excessively large OCSP status request may result in denial of service via memory exhaustion.
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.
SolutionUpgrade the affected packages.