Fontforge
CVE-2020-5496
HIGH
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
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Lifecycle Timeline
1DescriptionNVD
FontForge 20190801 has a heap-based buffer overflow in the Type2NotDefSplines() function in splinesave.c.
AnalysisAI
FontForge 20190801 has a heap-based buffer overflow in the Type2NotDefSplines() function in splinesave.c. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Technical ContextAI
This vulnerability is classified as Out-of-bounds Write (CWE-787), which allows attackers to write data beyond allocated buffer boundaries leading to code execution or crashes. FontForge 20190801 has a heap-based buffer overflow in the Type2NotDefSplines() function in splinesave.c. Affected products include: Fontforge, Opensuse Leap.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate write boundaries, use memory-safe languages, enable compiler protections (ASLR, stack canaries).
FontForge 20190813 through 20190820 has a buffer overflow in PrefsUI_LoadPrefs in prefs.c. Rated critical severity (CVSS
FontForge 20190801 has a use-after-free in SFD_GetFontMetaData in sfd.c. Rated high severity (CVSS 8.8), this vulnerabil
uiutil.c in FontForge through 20170731 does not validate strings before launching the program specified by the BROWSER e
FontForge 20161012 is vulnerable to a heap-based buffer overflow in readcffset (parsettf.c) resulting in DoS or code exe
FontForge 20161012 is vulnerable to a heap-based buffer over-read in readttfcopyrights (parsettf.c) resulting in DoS or
FontForge 20161012 is vulnerable to a stack-based buffer overflow in addnibble (parsettf.c) resulting in DoS or code exe
FontForge 20161012 is vulnerable to a heap-based buffer over-read in PSCharStringToSplines (psread.c) resulting in DoS o
FontForge 20161012 is vulnerable to a buffer over-read in getsid (parsettf.c) resulting in DoS or code execution via a c
FontForge 20161012 is vulnerable to a buffer over-read in strnmatch (char.c) resulting in DoS or code execution via a cr
FontForge 20161012 is vulnerable to a buffer over-read in ValidatePostScriptFontName (parsettf.c) resulting in DoS or co
FontForge 20161012 is vulnerable to a heap-based buffer over-read in readcfftopdicts (parsettf.c) resulting in DoS or co
FontForge 20161012 is vulnerable to a buffer over-read in umodenc (parsettf.c) resulting in DoS or code execution via a
Same weakness CWE-787 – Out-of-bounds Write
View allSame technique Buffer Overflow
View allShare
External POC / Exploit Code
Leaving vuln.today