[IT-SecNots] [SECURITY] [DSA 4157-1] openssl security update

[Salvatore Bonaccorso <carnil AT debian.org>]

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Debian Security Advisory DSA-4157-1                   security AT debian.org
https://www.debian.org/security/                     Salvatore Bonaccorso
March 29, 2018                        https://www.debian.org/security/faq
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Package        : openssl
CVE ID         : CVE-2017-3738 CVE-2018-0739

Multiple vulnerabilities have been discovered in OpenSSL, a Secure
Sockets Layer toolkit. The Common Vulnerabilities and Exposures project
identifies the following issues:

CVE-2017-3738

    David Benjamin of Google reported an overflow bug in the AVX2
    Montgomery multiplication procedure used in exponentiation with
    1024-bit moduli.

CVE-2018-0739

    It was discovered that constructed ASN.1 types with a recursive
    definition could exceed the stack, potentially leading to a denial
    of service.

Details can be found in the upstream advisory:
https://www.openssl.org/news/secadv/20180327.txt

For the oldstable distribution (jessie), these problems have been fixed
in version 1.0.1t-1+deb8u8. The oldstable distribution is not affected
by CVE-2017-3738.

For the stable distribution (stretch), these problems have been fixed in
version 1.1.0f-3+deb9u2.

We recommend that you upgrade your openssl packages.

For the detailed security status of openssl please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/openssl

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce AT lists.debian.org
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