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Graphite2 CVE-2016-2795

HIGH
Data Processing Errors (CWE-19)
2016-03-13 security@mozilla.org
Denial Of Service Linux Oracle Mozilla Firefox Leap Suse Linux Enterprise Opensuse Graphite2 Sil
8.8
CVSS 3.0 · NVD
View

Vulnerability Assessment

Weakness
CWE
CWE-19
ASVS 5.0
V2 - Validation and Business Logic Data processing
Impact

CVSS score of 8.8 (HIGH). Attack characteristics: network attack vector, low complexity, no privileges required, user interaction required. EPSS exploitation probability: 0.56%.
Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the high-severity affected system.
This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 0.6% exploitation probability (EPSS)

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AnalysisAI

The graphite2::FileFace::get_table_fn function in Graphite 2 before 1.3.6, as used in Mozilla Firefox before 45.0 and Firefox ESR 38.x before 38.7, does not initialize memory for an unspecified data. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

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Technical ContextAI · show details

This vulnerability is classified under CWE-19. The graphite2::FileFace::get_table_fn function in Graphite 2 before 1.3.6, as used in Mozilla Firefox before 45.0 and Firefox ESR 38.x before 38.7, does not initialize memory for an unspecified data structure, which allows remote attackers to cause a denial of service or possibly have unknown other impact via a crafted Graphite smart font. Affected products include: Opensuse Leap, Opensuse, Suse Linux Enterprise, Oracle Linux, Mozilla Firefox. Version information: before 1.3.6.

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

NVD PRIMARY 8.8 HIGH
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

DescriptionCVE.org

The graphite2::FileFace::get_table_fn function in Graphite 2 before 1.3.6, as used in Mozilla Firefox before 45.0 and Firefox ESR 38.x before 38.7, does not initialize memory for an unspecified data structure, which allows remote attackers to cause a denial of service or possibly have unknown other impact via a crafted Graphite smart font.

Threat Intelligence Overview

EPSS Score
0.6%
Top 32% exploitable
Data Quality
3 sources
Confidence: Low
NVD CVE.org EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 0.6%
Patch available No
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

45
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +44
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Denial of Service MEDIUM

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

Affected Products (CPE)CVE.org

cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*
cpe:2.3:o:suse:linux_enterprise:12.0:*:*:*:*:*:*:*
cpe:2.3:o:oracle:linux:5.0:*:*:*:*:*:*:*
cpe:2.3:o:oracle:linux:6:*:*:*:*:*:*:*
cpe:2.3:o:oracle:linux:7:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:38.0:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:38.0.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:38.0.5:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:38.1.0:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:38.1.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:38.2.0:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:38.2.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:38.3.0:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:38.4.0:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:38.5.0:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:38.5.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:38.6.0:*:*:*:*:*:*:*
+ 2 more

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CVE-2016-1522 HIGH POC
8.8 Feb 13

Code.cpp in Libgraphite in Graphite 2 1.2.4, as used in Mozilla Firefox before 43.0 and Firefox ESR 38.x before 38.6.1,

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In libgraphite2 in graphite2 1.3.11, a NULL pointer dereference vulnerability was found in Segment.cpp during a dumbRend
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The graphite2::TtfUtil::CmapSubtable12NextCodepoint function in Graphite 2 before 1.3.6, as used in Mozilla Firefox befo
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The directrun function in directmachine.cpp in Libgraphite in Graphite 2 1.2.4, as used in Mozilla Firefox before 43.0 a
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The Machine::Code::decoder::analysis::set_ref function in Graphite 2 before 1.3.6, as used in Mozilla Firefox before 45.
CVE-2016-2799 HIGH
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Heap-based buffer overflow in the graphite2::Slot::setAttr function in Graphite 2 before 1.3.6, as used in Mozilla Firef
CVE-2016-2802 HIGH
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The graphite2::TtfUtil::CmapSubtable4NextCodepoint function in Graphite 2 before 1.3.6, as used in Mozilla Firefox befor
CVE-2016-2801 HIGH
8.8 Mar 13

The graphite2::TtfUtil::CmapSubtable12Lookup function in TtfUtil.cpp in Graphite 2 before 1.3.6, as used in Mozilla Fire
CVE-2016-2800 HIGH
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The graphite2::Slot::getAttr function in Slot.cpp in Graphite 2 before 1.3.6, as used in Mozilla Firefox before 45.0 and
CVE-2016-2798 HIGH
8.8 Mar 13

The graphite2::GlyphCache::Loader::Loader function in Graphite 2 before 1.3.6, as used in Mozilla Firefox before 45.0 an
CVE-2016-2796 HIGH
8.8 Mar 13

Heap-based buffer overflow in the graphite2::vm::Machine::Code::Code function in Graphite 2 before 1.3.6, as used in Moz
CVE-2016-2792 HIGH
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The graphite2::Slot::getAttr function in Slot.cpp in Graphite 2 before 1.3.6, as used in Mozilla Firefox before 45.0 and

Same weakness CWE-19 – Data Processing Errors

View all
CVE-2015-5477 HIGH POC
7.5
CVE-2012-5357 CRITICAL POC
9.8
CVE-2016-4977 HIGH POC
8.8
CVE-2015-5374 HIGH POC
7.8
CVE-2016-3236 CRITICAL POC
9.8
CVE-2015-0097 CRITICAL POC
9.3
CVE-2015-0081 CRITICAL POC
9.3
CVE-2014-8598 MEDIUM POC
6.4

Same technique Denial Of Service

View all
CVE-2015-5119 CRITICAL POC
9.8
CVE-2011-2462 CRITICAL POC
9.8
CVE-2011-0611 HIGH POC
8.8
CVE-2012-1889 HIGH POC
8.8
CVE-2012-0507 CRITICAL POC
9.8
CVE-2014-1761 HIGH POC
7.8
CVE-2015-5122 CRITICAL POC
9.8
CVE-2011-0609 HIGH POC
7.8

References

Advisories & patches
ADVISORY http://www.mozilla.org/security/announce/2016/mfsa2016-37.html REF http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00027.html REF http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00029.html REF http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00031.html REF http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00050.html REF http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00068.html REF http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00089.html REF http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00091.html REF http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00093.html REF http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00006.html REF http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00007.html REF http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00008.html REF http://www.debian.org/security/2016/dsa-3510 REF http://www.debian.org/security/2016/dsa-3515 REF http://www.debian.org/security/2016/dsa-3520 REF http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html REF http://www.securityfocus.com/bid/84222 REF http://www.securitytracker.com/id/1035215 REF http://www.ubuntu.com/usn/USN-2917-1 REF http://www.ubuntu.com/usn/USN-2917-2 REF http://www.ubuntu.com/usn/USN-2917-3 REF http://www.ubuntu.com/usn/USN-2927-1 REF http://www.ubuntu.com/usn/USN-2934-1 REF https://bugzilla.mozilla.org/show_bug.cgi?id=1243597 REF https://security.gentoo.org/glsa/201605-06 REF https://security.gentoo.org/glsa/201701-63

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