Quantum Secular Labs / Blog / Advisories
CVE-2018-15520: Various Lexmark devices have a Buffer Overflow (issue 2 of 2).
CVE-2018-15520 is rated critical with a CVSS v3.0 base score of 9.8 and NVD lists 34 affected products, including Lexmark Cx82x Firmware. Per its scoring, it can be exploited over the network, without authentication, without any user interaction. The scored impact on confidentiality, integrity and availability is the highest available.
Vulnerability description
Various Lexmark devices have a Buffer Overflow (issue 2 of 2).
Severity breakdown
CVSS v3.0 9.8: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Attack vector: Network. Exploitable remotely over the network, with no need for local or physical access.
- Attack complexity: Low. No special conditions; the attack can be repeated reliably.
- Privileges required: None. No account or prior access is needed.
- User interaction: None. No action from any user is needed.
- Scope: Unchanged. Impact stays within the vulnerable component.
- Confidentiality impact: High. Total loss of confidentiality; sensitive data can be fully disclosed.
- Integrity impact: High. Total loss of integrity; data or system state can be fully modified.
- Availability impact: High. Total loss of availability; the component can be shut down.
Underlying weakness
CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary.
Affected products
- Lexmark Cx82x Firmware: up to and including cxtpp.052.024; from cxtpp.052.200 up to and including cxtpp.052.204
- Lexmark Cx860 Firmware: up to and including cxtpp.052.024; from cxtpp.052.200 up to and including cxtpp.052.204
- Lexmark Xc6152 Firmware: up to and including cxtpp.052.024; from cxtpp.052.200 up to and including cxtpp.052.204
- Lexmark Xc8155 Firmware: up to and including cxtpp.052.024; from cxtpp.052.200 up to and including cxtpp.052.204
- Lexmark Xc8160 Firmware: up to and including cxtpp.052.024; from cxtpp.052.200 up to and including cxtpp.052.204
- Lexmark Cx72x Firmware: up to and including cxtat.052.024; from cxtat.052.200 up to and including cxtat.052.204
- Lexmark Xc41x0 Firmware: up to and including cxtat.052.024; from cxtat.052.200 up to and including cxtat.052.204
- Lexmark Cx92x Firmware: up to and including cxtmh.052.024; from cxtmh.052.200 up to and including cxtmh.052.204
- Lexmark Xc92x5 Firmware: up to and including cxtmh.052.024; from cxtmh.052.200 up to and including cxtmh.052.204
- Lexmark Mx321 Firmware: up to and including mxngm.052.024; from mxngm.052.200 up to and including mxngm.052.204
- Lexmark Mb2338 Firmware: up to and including mxngm.052.024; from mxngm.052.200 up to and including mxngm.052.204
- Lexmark Mx42x Firmware: up to and including mxtgm.052.024; from mxtgm.052.200 up to and including mxtgm.052.204
- Lexmark Mx52x Firmware: up to and including mxtgm.052.024; from mxtgm.052.200 up to and including mxtgm.052.204
- Lexmark Mx622 Firmware: up to and including mxtgm.052.024; from mxtgm.052.200 up to and including mxtgm.052.204
- Lexmark Mb2442 Firmware: up to and including mxtgm.052.024; from mxtgm.052.200 up to and including mxtgm.052.204