An integer underflow flaw, leading to a heap-based buffer overflow, was found in the ksba_oid_to_str() function of libksba, an X.509 and CMS (PKCS#7) library. By using special crafted S/MIME messages or ECC based OpenPGP data, it is possible to create a buffer overflow, which could

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Debian Security Advisory DSA-3078-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
http://www.debian.org/security/                      Salvatore Bonaccorso
November 27, 2014                      http://www.debian.org/security/faq
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Package        : libksba
CVE ID         : CVE-2014-9087
Debian Bug     : 770972

An integer underflow flaw, leading to a heap-based buffer overflow, was
found in the ksba_oid_to_str() function of libksba, an X.509 and CMS
(PKCS#7) library. By using special crafted S/MIME messages or ECC based
OpenPGP data, it is possible to create a buffer overflow, which could
cause an application using libksba to crash (denial of service), or
potentially, execute arbitrary code.

For the stable distribution (wheezy), this problem has been fixed in
version 1.2.0-2+deb7u1.

For the upcoming stable distribution (jessie), this problem has been
fixed in version 1.3.2-1.

For the unstable distribution (sid), this problem has been fixed in
version 1.3.2-1.

We recommend that you upgrade your libksba packages.

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/

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