Package: libgcrypt20 Source: gnupg2 Version: 1.7.9-1 Severity: normal File: gcrypt
Dear Maintainer, As reported in the gnupg mailing list (thread links below), the gpg-agent failed to decrypt secret keys for client applications when a large number of concurrent requests were made. libgcrypt takes care to manage secure memory. It allocates pools of memory in SECMEM_BUFFER_SIZE size chunks. The first of these pools is mlock()ed to prevent swapping. Certain secure memory allocation only use memory from this first pool. If this first pool is full, libgcrypt reported an ENOMEM error up to the caller. In the case of the gpg-agent, it failed to decrypt private keys when it received a large number of concurrent key decryption requests. These decryption failures resulted in intermittment to short periods of persistent failures in calling applications. libgcrypt 1.8.1 contains the needed fixes and is compatile with GnuPG 2.1. Specific changes also need to be back ported to GnuPG 2.1 to take advantage of these options. These changes are trivial to backport. Mailing list threads: https://lists.gnupg.org/pipermail/gnupg-devel/2017-June/032937.html https://lists.gnupg.org/pipermail/gnupg-devel/2017-November/033280.html -- System Information: Debian Release: buster/sid APT prefers unstable-debug APT policy: (500, 'unstable-debug'), (500, 'unstable') Architecture: amd64 (x86_64) Kernel: Linux 4.9.0-2-amd64 (SMP w/8 CPU cores) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages libgcrypt20:amd64 depends on: ii libc6 2.24-17 ii libgpg-error0 1.27-3 libgcrypt20:amd64 recommends no packages. Versions of packages libgcrypt20:amd64 suggests: pn rng-tools <none> -- no debconf information The information contained in this message is proprietary and/or confidential. If you are not the intended recipient, please: (i) delete the message and all copies; (ii) do not disclose, distribute or use the message in any manner; and (iii) notify the sender immediately. In addition, please be aware that any message addressed to our domain is subject to archiving and review by persons other than the intended recipient. Thank you.
