Graphite2
CVE-2016-2791
HIGH
Vulnerability Assessment
| Weakness |
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Bounds checking, buffer size validation
MITRE ATT&CK
2 techniques across 2 tactics: Execution, Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| 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 | A remote attacker could corrupt memory to execute arbitrary code or crash the application by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability. |
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Alert meAnalysisAI
The graphite2::GlyphCache::glyph function in Graphite 2 before 1.3.6, as used in Mozilla Firefox before 45.0 and Firefox ESR 38.x before 38.7, allows remote attackers to cause a denial of service. 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. Use memory-safe languages or bounds-checking. Enable ASLR, DEP/NX, stack canaries. Use safe string functions.
Affects your stack
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Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified as Buffer Overflow (CWE-119), which allows attackers to corrupt memory to execute arbitrary code or crash the application. The graphite2::GlyphCache::glyph function in Graphite 2 before 1.3.6, as used in Mozilla Firefox before 45.0 and Firefox ESR 38.x before 38.7, allows remote attackers to cause a denial of service (buffer over-read) or possibly have unspecified other impact via a crafted Graphite smart font. Affected products include: Opensuse Leap, Opensuse, Suse Linux Enterprise, Mozilla Firefox, Oracle Linux. 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
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
DescriptionCVE.org
The graphite2::GlyphCache::glyph function in Graphite 2 before 1.3.6, as used in Mozilla Firefox before 45.0 and Firefox ESR 38.x before 38.7, allows remote attackers to cause a denial of service (buffer over-read) or possibly have unspecified other impact via a crafted Graphite smart font.
Threat Intelligence Overview
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.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.
Affected Products (CPE)CVE.org
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,
In libgraphite2 in graphite2 1.3.11, a NULL pointer dereference vulnerability was found in Segment.cpp during a dumbRend
The graphite2::TtfUtil::CmapSubtable12NextCodepoint function in Graphite 2 before 1.3.6, as used in Mozilla Firefox befo
The directrun function in directmachine.cpp in Libgraphite in Graphite 2 1.2.4, as used in Mozilla Firefox before 43.0 a
The Machine::Code::decoder::analysis::set_ref function in Graphite 2 before 1.3.6, as used in Mozilla Firefox before 45.
Heap-based buffer overflow in the graphite2::Slot::setAttr function in Graphite 2 before 1.3.6, as used in Mozilla Firef
The graphite2::TtfUtil::CmapSubtable4NextCodepoint function in Graphite 2 before 1.3.6, as used in Mozilla Firefox befor
The graphite2::TtfUtil::CmapSubtable12Lookup function in TtfUtil.cpp in Graphite 2 before 1.3.6, as used in Mozilla Fire
The graphite2::Slot::getAttr function in Slot.cpp in Graphite 2 before 1.3.6, as used in Mozilla Firefox before 45.0 and
The graphite2::GlyphCache::Loader::Loader function in Graphite 2 before 1.3.6, as used in Mozilla Firefox before 45.0 an
Heap-based buffer overflow in the graphite2::vm::Machine::Code::Code function in Graphite 2 before 1.3.6, as used in Moz
The graphite2::FileFace::get_table_fn function in Graphite 2 before 1.3.6, as used in Mozilla Firefox before 45.0 and Fi
GitHub PoC
Exploit-DB