CVE-2018-14633

Advisory lineage Upstream: 0 Downstream: 43
Modified
Published: 25 Sept 2018, 00:00
Last modified:05 Aug 2024, 09:38

Vulnerability Summary

Overall Risk (default)
medium
35/100
CVSS Score
8.3 HIGH
v2.0 (nvd)
EPSS Score
7.3% LOW
7% probability -0.68%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

25 Sept 2018, 00:00
Published
Vulnerability first disclosed
05 Aug 2024, 09:38
Last Modified
Vulnerability information updated

Description

A security flaw was found in the chap_server_compute_md5() function in the ISCSI target code in the Linux kernel in a way an authentication request from an ISCSI initiator is processed. An unauthenticated remote attacker can cause a stack buffer overflow and smash up to 17 bytes of the stack. The attack requires the iSCSI target to be enabled on the victim host. Depending on how the target's code was built (i.e. depending on a compiler, compile flags and hardware architecture) an attack may lead to a system crash and thus to a denial-of-service or possibly to a non-authorized access to data exported by an iSCSI target. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is highly unlikely. Kernel versions 4.18.x, 4.14.x and 3.10.x are believed to be vulnerable.

CVSS Metrics

  • v3.1•HIGH•Score: 7CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H
  • v3.0•HIGH•Score: 7CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H
  • v2.0•HIGH•Score: 8.3AV:N/AC:M/Au:N/C:P/I:P/A:C

EPSS Trends

Current EPSS score: 7.30%• Percentile: 92%

Techniques & Countermeasures

  • CWE-787•Out-of-bounds Write

    The product writes data past the end, or before the beginning, of the intended buffer.

  • CWE-121•Stack-based Buffer Overflow

    A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

Affected Systems

  • canonical•ubuntu_linux

    12.04 | 14.04 | 16.04 | 18.04

  • debian•debian_linux

    8.0 | 9.0

  • linux•linux_kernel

    ≥ 3.1, < 3.16.59 | ≥ 3.17, < 3.18.124 | ≥ 3.19, < 4.4.159 | ≥ 4.5, < 4.9.130 | ≥ 4.10, < 4.14.73 | ≥ 4.15, < 4.18.11

  • redhat•enterprise_linux_eus

    7.4 | 7.6

  • redhat•enterprise_linux_server

    7.0

  • redhat•enterprise_linux_server_aus

    7.4 | 7.6

  • redhat•enterprise_linux_server_tus

    7.4 | 7.6

  • redhat•enterprise_linux_workstation

    7.0

  • the linux foundation•kernel

    4.18.x, 4.14.x, 3.10.x

References (18)