GLSA-200609-18 : Opera: RSA signature forgery

This script is Copyright (C) 2006-2014 Tenable Network Security, Inc.


Synopsis :

The remote Gentoo host is missing one or more security-related
patches.

Description :

The remote host is affected by the vulnerability described in GLSA-200609-18
(Opera: RSA signature forgery)

Opera makes use of OpenSSL, which fails to correctly verify PKCS #1
v1.5 RSA signatures signed by a key with exponent 3. Some CAs in
Opera's list of trusted signers are using root certificates with
exponent 3.

Impact :

An attacker could forge certificates which will appear valid and signed
by a trusted CA.

Workaround :

There is no known workaround at this time.

See also :

http://www.opera.com/support/search/supsearch.dml?index=845
http://www.gentoo.org/security/en/glsa/glsa-200609-05.xml
http://www.gentoo.org/security/en/glsa/glsa-200609-18.xml

Solution :

All Opera users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=www-client/opera-9.02'

Risk factor :

Medium / CVSS Base Score : 6.4
(CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N)
CVSS Temporal Score : 4.7
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

Family: Gentoo Local Security Checks

Nessus Plugin ID: 22469 (gentoo_GLSA-200609-18.nasl)

Bugtraq ID: 19849

CVE ID: