GLSA 200312-05: GnuPG: ElGamal signing keys compromised and format string vulnerability

http://security.gentoo.org/

Опасность:	translation missing: ru, label_glsa_minimal
Заголовок:	GnuPG: ElGamal signing keys compromised and format string vulnerability
Дата:	12.12.2003
Ошибки:	#34504
ID:	200312-05

Сводка

A bug in GnuPG allows ElGamal signing keys to be compromised, and a format string bug in the gpgkeys_hkp utility may allow arbitrary code execution.

Назначение

GnuPG is a popular open source signing and encryption tool.

Уязвимые пакеты

Пакет	Уязвимый	Нетронутый	Архитектура(ы)
app-crypt/gnupg	<= 1.2.3-r4	>= 1.2.3-r5	All supported architectures

Описание

Two flaws have been found in GnuPG 1.2.3.

First, ElGamal signing keys can be compromised. These keys are not commonly used, but this is "a significant security failure which can lead to a compromise of almost all ElGamal keys used for signing. Note that this is a real world vulnerability which will reveal your private key within a few seconds".

Second, there is a format string flaw in the 'gpgkeys_hkp' utility which "would allow a malicious keyserver in the worst case to execute an arbitrary code on the user's machine."

Воздействие

If you have used ElGamal keys for signing your private key can be compromised, and a malicious keyserver could remotely execute arbitrary code with the permissions of the user running gpgkeys_hkp.

Обход

There is no known workaround at this time.

Решение

All users who have created ElGamal signing keys should immediately revoke them. In addition, all Gentoo Linux machines with gnupg installed should be updated to use gnupg-1.2.3-r5 or higher:

    # emerge sync
    # emerge -pv '>=app-crypt/gnupg-1.2.3-r5'
    # emerge '>=app-crypt/gnupg-1.2.3-r5'
    # emerge clean

Ссылки

Наличие

Этот GLSA и любые обновления для нее доступны для просмотра на сайте Gentoo Security: http://security.gentoo.org/glsa/glsa-200312-05.xml

Опасения?

Безопасность является одной из главных задач Gentoo Linux и первостепенное значение обеспечить конфиденциальность и безопасность машин наших пользователей. Любые соображения безопасности должны быть адресованы security@gentoo.org или в качестве альтернативы, вы можете сообщить об ошибке на https://bugs.gentoo.org.