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[ GLSA 200609-18 ] Opera: RSA signature forgery
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GLSA
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Joined: 12 May 2004
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PostPosted: Thu Sep 28, 2006 3:26 pm    Post subject: [ GLSA 200609-18 ] Opera: RSA signature forgery Reply with quote

Gentoo Linux Security Advisory

Title: Opera: RSA signature forgery (GLSA 200609-18)
Severity: normal
Exploitable: remote
Date: September 28, 2006
Bug(s): #147838
ID: 200609-18

Synopsis


Opera fails to correctly verify certain signatures.


Background


Opera is a multi-platform web browser.


Affected Packages

Package: www-client/opera
Vulnerable: < 9.02
Unaffected: >= 9.02
Architectures: All supported architectures


Description


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.


Resolution


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


References

Opera Advisory
GLSA 200609-05


Last edited by GLSA on Mon Jun 10, 2013 4:23 am; edited 2 times in total
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