[USN-3689-2] Libgcrypt vulnerability


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Ubuntu Security Notice USN-3689-2
June 19, 2018

libgcrypt11 vulnerability
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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A security issue affects these releases of Ubuntu and its derivatives:

– Ubuntu 12.04 ESM

Summary:

Libgcrypt could be made to expose sensitive information.

Software Description:
– libgcrypt11: LGPL Crypto library

Details:

USN-3689-1 fixed a vulnerability in Libgcrypt. This update provides
the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

=C2=A0Keegan Ryan discovered that Libgcrypt was susceptible to a side-
=C2=A0channel attack. A local attacker could possibly use this attack to
=C2=A0recover ECDSA private keys.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 12.04 ESM:
=C2=A0 libgcrypt11=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A01.5.0-=
3ubuntu0.8

In general, a standard system update will make all the necessary
changes.

References:
=C2=A0 https://usn.ubuntu.com/usn/usn-3689-2
=C2=A0 https://usn.ubuntu.com/usn/usn-3689-1
=C2=A0 CVE-2018-0495
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