High severity · published Feb 26, 2021
CVE-2021-26567
Stack-based buffer overflow vulnerability in frontend/main.c in faad2 before 2.2.7.1 allow local attackers to execute arbitrary code via filename and pathname options
7.8
CVSS
1.1%
EPSS
No
On KEV
Description
Stack-based buffer overflow vulnerability in frontend/main.c in faad2 before 2.2.7.1 allow local attackers to execute arbitrary code via filename and pathname options.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.1% · higher than 66% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DM
Diskstation Manager · Synology
before 6.2.3-25426-3 · source: NVD
DM
Diskstation Manager Unified Controller · Synology
3.0 · source: NVD
FA
Faad2 · Faad2 Project
before 2.2.7.1 · source: NVD
SF
Skynas Firmware · Synology
All versions, or not specified · source: NVD
VF
Vs960hd Firmware · Synology
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-26567
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-26567
Patch
https://github.com/knik0/faad2/commit/720f7004d6c4aabee19aad16e7c456ed76a3ebfa
Vendor Advisory
https://www.synology.com/security/advisory/Synology_SA_20_26
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