8.4high
CVE-2016-20046
zFTP Client 20061220+dfsg3-4.1 Local Buffer Overflow
Published 7 mo ago · modified 4 mo ago · JSON
CVSS
8.4
v3.1 · CNA
CISA KEV
No
not known exploited
EPSS
0.2%
percentile 4%
Public exploits
0
none known
Summary
zFTP Client 20061220+dfsg3-4.1 contains a buffer overflow vulnerability in the NAME parameter handling of FTP connections that allows local attackers to crash the application or execute arbitrary code. Attackers can supply an oversized NAME value exceeding the 80-byte buffer allocated in strcpy_chk to overwrite the instruction pointer and execute shellcode with user privileges.
CISA SSVC assessment
- Exploitation
- Proof of concept public
- Automatable
- no
- Technical impact
- total
- Assessed
- 7 mo ago
Exploit prediction (EPSS)
0.15% probability of exploitation in the next 30 days, higher than 4% of all scored CVEs.
CVSS scores
| Assigned by | Version | Score | Vector |
|---|---|---|---|
| CNA | 4.0 | 8.6 | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| CNA | 3.1 | 8.4 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| CNA | 4.0 | 8.6 | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| CNA | 3.1 | 8.4 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- zFTP zFTP Client
Classification
- Weakness
- CWE-787 Out-of-bounds Write
References
- exploit-db.com /exploits/40203 · exploit
- cernlib.web.cern.ch /cernlib/ · product
- vulncheck.com /advisories/zftp-client-20061220-dfsg3-local-buffer-overflow · third-party-advisory
Sources
- CVE List: CVE-2016-20046
- NVD: CVE-2016-20046
vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.