Otkriveno je nekoliko sigurnosnih propusta paketa Evince koje je moguće iskoristiti za izvođenje napada uskraćivanjem usluge ili pokretanje proizvoljnog programskog koda.
Paket:
Evince 2.x
Operacijski sustavi:
Debian Linux 5.0 (lenny), Debian Linux 6.0 (squeeze)
Kritičnost:
6.4
Problem:
cjelobrojno prepisivanje, pogreška u programskoj komponenti, preljev međuspremnika
Navedene ranjivosti posljedica su pogrešaka u PK, VF, AFM i TFM font analizatorima u datotekama backend/dvi/mdvi-lib/pk.c, backend/dvi/mdvi-lib/vf.c, backend/dvi/mdvi-lib/afmparse.c te backend/dvi/mdvi-lib/tfmfile.c.
Posljedica:
Navedene ranjivosti udaljeni zlonamjerni korisnik može iskoristiti za izvođenje DoS napada ili proizvoljno izvršavanje programskog koda.
Rješenje:
Rješenje problema sigurnosti je nadogradnja paketa na novije inačice.
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Debian Security Advisory DSA-2357-1 Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.
http://www.debian.org/security/ Yves-Alexis Perez
December 03, 2011 http://www.debian.org/security/faq
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Package : evince
Vulnerability : several
Problem type : remote
Debian-specific: no
CVE ID : CVE-2010-2640 CVE-2010-2641 CVE-2010-2642 CVE-2010-264320
Debian Bug : 609534
Jon Larimer from IBM X-Force Advanced Research discovered multiple
vulnerabilities in the DVI backend of the evince document viewer:
CVE-2010-2640
Insuficient array bounds checks in the PK fonts parser could lead
to function pointer overwrite, causing arbitrary code execution.
CVE-2010-2641
Insuficient array bounds checks in the PK fonts parser could lead
to function pointer overwrite, causing arbitrary code execution.
CVE-2010-2642
Insuficient bounds checks in the AFM fonts parser when writing
data to a memory buffer allocated on heap could lead to arbitrary
memory overwrite and arbitrary code execution.
CVE-2010-2643
Insuficient check on an integer used as a size for memory
allocation can lead to arbitrary write outside the allocated range
and cause arbitrary code execution.
For the oldstable distribution (lenny), this problem has been fixed in
version 2.22.2-4~lenny2.
For the stable distribution (squeeze), CVE-2010-2640, CVE-2010-2641
and CVE-2010-2643 have been fixed in version 2.30.3-2 but the fix for
CVE-2010-2642 was incomplete. The final fix is present in version
2.30.3-2+squeeze1.
For the testing distribution (wheezy), this problem has been fixed in
version 3.0.2.
For the unstable distribution (sid), this problem has been fixed in
version 3.0.2.
We recommend that you upgrade your evince 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/
Mailing list: Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.
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