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The remote Oracle Linux host is missing one or more security updates.
From Red Hat Security Advisory 2006:0680 :
Updated gnutls packages that fix a security issue are now available
for Red Hat Enterprise Linux 4.
This update has been rated as having important security impact by the
Red Hat Security Response Team.
The GnuTLS Library provides support for cryptographic algorithms and
protocols such as TLS. GnuTLS includes libtasn1, a library developed
for ASN.1 structures management that includes DER encoding and
Daniel Bleichenbacher recently described an attack on PKCS #1 v1.5
signatures. Where an RSA key with exponent 3 is used it may be
possible for an attacker to forge a PKCS #1 v1.5 signature that would
be incorrectly verified by implementations that do not check for
excess data in the RSA exponentiation result of the signature.
The core GnuTLS team discovered that GnuTLS is vulnerable to a variant
of the Bleichenbacker attack. This issue affects applications that use
GnuTLS to verify X.509 certificates as well as other uses of PKCS #1
In Red Hat Enterprise Linux 4, the GnuTLS library is only used by the
Evolution client when connecting to an Exchange server or when
publishing calendar information to a WebDAV server.
Users are advised to upgrade to these updated packages, which contain
a backported patch from the GnuTLS maintainers to correct this issue.
See also :
Update the affected gnutls packages.
Risk factor :
Medium / CVSS Base Score : 5.0
CVSS Temporal Score : 4.3
Public Exploit Available : false
Family: Oracle Linux Local Security Checks
Nessus Plugin ID: 67410 ()
Bugtraq ID: 20027
CVE ID: CVE-2006-4790
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