Red Hat Enterprise Linux: Updated openssl packages that fix three security issues are now available
for Red Hat Enterprise Linux 6 and 7.
Red Hat Product Security has rated this update as having Moderate security
impact. Common Vulnerability Scoring System (CVSS) base scores, which give
detailed severity ratings, are available for each vulnerability from the
CVE links in the References section.
CVE-2015-3194, CVE-2015-3195, CVE-2015-3196
Red Hat Enterprise Linux: Updated openssl packages that fix one security issue are now available
for Red Hat Enterprise Linux 5.
Red Hat Product Security has rated this update as having Moderate security
impact. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available from the CVE link in the
References section.
CVE-2015-3195
Avast suffers from a stack buffer overflow where strncpy length is discarded.
14th December, 2015
A security issue affects these releases of Ubuntu and its
derivatives:
libxml2 could be made to crash if it opened a specially crafted file.
Kostya Serebryany discovered that libxml2 incorrectly handled certain
malformed documents. If a user or automated system were tricked into
opening a specially crafted document, an attacker could possibly cause
libxml2 to crash, resulting in a denial of service. (CVE-2015-5312,
CVE-2015-7497, CVE-2015-7498, CVE-2015-7499,CVE-2015-7500)
Hugh Davenport discovered that libxml2 incorrectly handled certain
malformed documents. If a user or automated system were tricked into
opening a specially crafted document, an attacker could possibly cause
libxml2 to crash, resulting in a denial of service. (CVE-2015-8241,
CVE-2015-8242)
Hanno Boeck discovered that libxml2 incorrectly handled certain
malformed documents. If a user or automated system were tricked into
opening a specially crafted document, an attacker could possibly cause
libxml2 to crash, resulting in a denial of service. This issue only applied
to Ubuntu 12.04 LTS, Ubuntu 14.04 LTS and Ubuntu 15.04. (CVE-2015-8317)
The problem can be corrected by updating your system to the following
package version:
To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to reboot your computer to make
all the necessary changes.
It is possible for an attacker to execute a DLL planting attack in Microsoft Office 2010 on Windows 7 x86 with a specially crafted OLE object. This attack also works on Office 2013 running on Windows 7 x64. Other platforms were not tested. The attached POC document “planted-mqrt.doc” contains what was originally an embedded Packager object. The CLSID for this object was changed at offset 0x2650 to be {ecabafc9-7f19-11d2-978e-0000f8757e2a} (formatted as pack(“>IHHBBBBBBBB”)). This object has a InProcServer32 pointing to comsvcs.dll. Specifically the CQueueAdmin object implemented in the dll. When a user opens this document and single clicks on the icon for foo.txt ole32!OleLoad is invoked on our vulnerable CLSID. This results in a call to a class factory constructor that tries eventually tries to call mqrt!MQGetPrivateComputerInformation. Because mqrt is a delay loaded dll the loader has inserted a stub to call _tailMerge_mqrt_dll on the first call of this function. This results in a kernelbase!LoadLibraryExA call vulnerable to dll planting. If the attached mqrt.dll is placed in the same directory with the planted-mqrt.doc file you should see a popup coming from this DLL being loaded from the current working directory of Word.
Trivial fuzzing of molebox archives revealed a heap overflow decrypting the packed image in moleboxMaybeUnpack. This vulnerability is obviously exploitable for remote arbitrary code execution as NT AUTHORITYSYSTEM.
The attached PEncrypt packed executable causes an OOB write on Avast Server Edition. The attached testcase has the password “infected” to avoid disrupting your mail server.
The attached Microsoft Access Database causes JetDb::IsExploited4x to be called, which contains an unbounded search for objects.
The attached file crashes in CmdExtract::UnstoreFile because the signed int64 DestUnpSize is truncated to an unsigned 32bit integer. Perhaps CmdExtract::ExtractCurrentFile should sanity check Arc.FileHead.UnpSize early. The researcher observed this crash in Avast Antivirus, but the origin of the code appears to be the unrar source distribution. Many other antiviruses may be affected, and presumably WinRAR and other archivers.
If the numFonts field in the TTC header is greater than (SIZE_MAX+1) / 4, an integer overflow occurs in filevirus_ttf() when calling CSafeGenFile::SafeLockBuffer.