The following two security updates are available for Debian GNU/Linux: [DSA 2850-2] libyaml regression update and [DSA 2860-1] parcimonie security update



[DSA 2850-2] libyaml regression update

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Debian Security Advisory DSA-2850-2 security@debian.org
http://www.debian.org/security/ Salvatore Bonaccorso
February 12, 2014 http://www.debian.org/security/faq
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Package : libyaml
Vulnerability : regression
Debian Bug : 738587

The security update released in DSA-2850-1 for libyaml introduced a
regression in libyaml failing to parse a subset of valid yaml documents.
For reference the original advisory text follows.

Florian Weimer of the Red Hat Product Security Team discovered a
heap-based buffer overflow flaw in LibYAML, a fast YAML 1.1 parser and
emitter library. A remote attacker could provide a YAML document with a
specially-crafted tag that, when parsed by an application using libyaml,
would cause the application to crash or, potentially, execute arbitrary
code with the privileges of the user running the application.

For the oldstable distribution (squeeze), this problem has been fixed in
version 0.1.3-1+deb6u3.

For the stable distribution (wheezy), this problem has been fixed in
version 0.1.4-2+deb7u3.

For the unstable distribution (sid), this problem will be fixed soon.

We recommend that you upgrade your libyaml packages.

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

[DSA 2860-1] parcimonie security update

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Debian Security Advisory DSA-2860-1 security@debian.org
http://www.debian.org/security/ Salvatore Bonaccorso
February 11, 2014 http://www.debian.org/security/faq
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Package : parcimonie
Vulnerability : information disclosure
CVE ID : CVE-2014-1921
Debian Bug : 738134

Holger Levsen discovered that parcimonie, a privacy-friendly helper to
refresh a GnuPG keyring, is affected by a design problem that undermines
the usefulness of this piece of software in the intended threat model.

When using parcimonie with a large keyring (1000 public keys or more),
it would always sleep exactly ten minutes between two key fetches. This
can probably be used by an adversary who can watch enough key fetches to
correlate multiple key fetches with each other, which is what parcimonie
aims at protecting against. Smaller keyrings are affected to a smaller
degree. This problem is slightly mitigated when using a HKP(s) pool as
the configured GnuPG keyserver.

For the stable distribution (wheezy), this problem has been fixed in
version 0.7.1-1+deb7u1.

For the unstable distribution (sid), this problem has been fixed in
version 0.8.1-1.

We recommend that you upgrade your parcimonie packages.

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