Debian Security Advisory
DSA-3673-1 openssl -- security update
- Date Reported:
- 22 Sep 2016
- Affected Packages:
- Security database references:
- In Mitre's CVE dictionary: CVE-2016-2177, CVE-2016-2178, CVE-2016-2179, CVE-2016-2180, CVE-2016-2181, CVE-2016-2182, CVE-2016-2183, CVE-2016-6302, CVE-2016-6303, CVE-2016-6304, CVE-2016-6306.
- More information:
Several 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-arithmetic/
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 the stable distribution (jessie), these problems have been fixed in version 1.0.1t-1+deb8u4.
For the unstable distribution (sid), these problems will be fixed soon.
We recommend that you upgrade your openssl packages.