Vulnerability Name:

CVE-2020-26941 (CCN-195497)

Assigned:2020-10-10
Published:2021-01-18
Updated:2021-02-02
Summary:A local (authenticated) low-privileged user can exploit a behavior in an ESET installer to achieve arbitrary file overwrite (deletion) of any file via a symlink, due to insecure permissions. The possibility of exploiting this vulnerability is limited and can only take place during the installation phase of ESET products. Furthermore, exploitation can only succeed when Self-Defense is disabled. Affected products are: ESET NOD32 Antivirus, ESET Internet Security, ESET Smart Security, ESET Smart Security Premium versions 13.2 and lower; ESET Endpoint Antivirus, ESET Endpoint Security, ESET NOD32 Antivirus Business Edition, ESET Smart Security Business Edition versions 7.3 and lower; ESET File Security for Microsoft Windows Server, ESET Mail Security for Microsoft Exchange Server, ESET Mail Security for IBM Domino, ESET Security for Kerio, ESET Security for Microsoft SharePoint Server versions 7.2 and lower.
CVSS v3 Severity:5.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N)
4.8 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
5.5 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N)
4.8 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
CVSS v2 Severity:3.6 Low (CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): Partial
4.6 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:N/I:C/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): Complete
Availibility (A): None
Vulnerability Type:CWE-276
Vulnerability Consequences:Gain Privileges
References:Source: MITRE
Type: CNA
CVE-2020-26941

Source: XF
Type: UNKNOWN
eset-cve202026941-priv-esc(195497)

Source: CCN
Type: ESET Customer Advisory 2021-0001
[CA7794] Local privilege escalation vulnerability fixed in ESET products for Windows

Source: MISC
Type: Vendor Advisory
https://support.eset.com/en/ca7794-local-privilege-escalation-vulnerability-fixed-in-eset-products-for-windows

Vulnerable Configuration:Configuration 1:
  • cpe:/a:eset:endpoint_antivirus:*:*:*:*:*:-:*:* (Version <= 7.3)
  • OR cpe:/a:eset:endpoint_security:*:*:*:*:*:*:*:* (Version <= 7.3)
  • OR cpe:/a:eset:file_security:*:*:*:*:*:windows_server:*:* (Version <= 7.2)
  • OR cpe:/a:eset:internet_security:*:*:*:*:*:*:*:* (Version <= 13.2)
  • OR cpe:/a:eset:internet_security:1294:*:*:*:*:*:*:*
  • OR cpe:/a:eset:mail_security:*:*:*:*:*:domino:*:* (Version <= 7.2)
  • OR cpe:/a:eset:mail_security:*:*:*:*:*:exchange_server:*:* (Version <= 7.2)
  • OR cpe:/a:eset:nod32_antivirus:*:*:*:*:business:*:*:* (Version <= 7.3)
  • OR cpe:/a:eset:nod32_antivirus:*:*:*:*:*:-:*:* (Version <= 13.2)
  • OR cpe:/a:eset:security:*:*:*:*:*:kerio:*:* (Version <= 7.2)
  • OR cpe:/a:eset:security:*:*:*:*:*:sharepoint_server:*:* (Version <= 7.2)
  • OR cpe:/a:eset:smart_security:*:*:*:*:business:*:*:* (Version <= 7.3)
  • OR cpe:/a:eset:smart_security:*:*:*:*:premium:*:*:* (Version <= 13.2)
  • OR cpe:/a:eset:smart_security:*:*:*:*:-:*:*:* (Version <= 13.2)

    • * Denotes that component is vulnerable
    BACK
    eset endpoint antivirus *
    eset endpoint security *
    eset file security *
    eset internet security *
    eset internet security 1294
    eset mail security *
    eset mail security *
    eset nod32 antivirus *
    eset nod32 antivirus *
    eset security *
    eset security *
    eset smart security *
    eset smart security *
    eset smart security *