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CVE-2017-11571· NVD / CVE Program· CNA mitre

FontForge 20161012 is vulnerable to a stack-based buffer overflow in addnibble (parsettf.c) resulting in DoS or code execution via a crafted

FontForge 20161012 is vulnerable to a stack-based buffer overflow in addnibble (parsettf.c) resulting in DoS or code execution via a crafted otf file.

HighCVSS 7.8 · v3.0—No exploit Fix available
Published
Jul 23, 2017
Updated
Jun 16, 2026
EPSS
1.4% · 72th percentile
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Report tools

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Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.4%

Affected systems

VendorProduct
fontforgefontforge

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • fontforge fontforge20161012

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12fontforgebefore 1:20170731~dfsg-11:20170731~dfsg-1
Debian:7fontforgebefore 0.0.20120101+git-2+deb7u10.0.20120101+git-2+deb7u1
Debian:8fontforgebefore 20120731.b-5+deb8u120120731.b-5+deb8u1
Debian:9fontforgebefore 1:20161005~dfsg-4+deb9u11:20161005~dfsg-4+deb9u1
SUSE:Linux Enterprise Software Development Kit 12 SP4fontforgebefore 20170731-11.8.120170731-11.8.1

Same product

fontforge: all records

Other highest-scoring records for the same primary product.

  • CVE-2019-15785FontForge 20190813 through 20190820 has a buffer overflow in PrefsUI_LoadPrefs in prefs.c.
    40Plan
  • CVE-2020-5496FontForge 20190801 has a heap-based buffer overflow in the Type2NotDefSplines() function in splinesave.c.
    36Monitor
  • CVE-2020-5395FontForge 20190801 has a use-after-free in SFD_GetFontMetaData in sfd.c.
    36Monitor
  • CVE-2017-17521uiutil.c in FontForge through 20170731 does not validate strings before launching the program specified by the BROWSER environment variable,
    36Monitor
  • CVE-2025-15280FontForge SFD File Parsing Use-After-Free Remote Code Execution Vulnerability
    35Monitor
  • CVE-2025-15275FontForge SFD File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability
    35Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:fontforge1:20170731~dfsg-1 · Debian:12Package registry (OSV)
suse:fontforge20170731-11.8.1 · SUSE:Linux Enterprise Software Development Kit 12 SP4Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer

CVSS vector

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records