Vulnerability Name:

CVE-2019-20808 (CCN-194343)

Assigned:2019-09-17
Published:2019-09-17
Updated:2021-03-31
Summary:In QEMU 4.1.0, an out-of-bounds read flaw was found in the ATI VGA implementation. It occurs in the ati_cursor_define() routine while handling MMIO write operations through the ati_mm_write() callback. A malicious guest could abuse this flaw to crash the QEMU process, resulting in a denial of service.
CVSS v3 Severity:6.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H)
5.7 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/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): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
2.8 Low (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:L)
2.5 Low (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:L/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Low
CVSS v2 Severity:2.1 Low (CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
1.0 Low (CCN CVSS v2 Vector: AV:L/AC:H/Au:S/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): High
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
Vulnerability Type:CWE-125
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2019-20808

Source: MISC
Type: Issue Tracking, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1841136

Source: XF
Type: UNKNOWN
qemu-cve201920808-dos(194343)

Source: CCN
Type: QEMU GIT Repository
ati: use vga_read_byte in ati_cursor_define

Source: MISC
Type: Patch, Vendor Advisory
https://git.qemu.org/?p=qemu.git;a=commit;h=aab0e2a661b2b6bf7915c0aefe807fb60d6d9d13

Source: CONFIRM
Type: Third Party Advisory
https://security.netapp.com/advisory/ntap-20210205-0003/

Source: CCN
Type: QEMU Web site
Contribute to QEMU! - QEMU

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2019-20808

Vulnerable Configuration:Configuration 1:
  • cpe:/a:qemu:qemu:4.1.0:-:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:qemu:qemu:4.1.0:-:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    qemu qemu 4.1.0 -
    qemu qemu 4.1.0