CVE-2020-27840

Aliases:ALPINE-CVE-2020-27840DEBIAN-CVE-2020-27840
Advisory lineage Upstream: 0 Downstream: 21
Modified
Published: 12 May 2021, 14:06
Last modified:04 Aug 2024, 16:25

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.5 HIGH
v3.1 (nvd)
EPSS Score
3.83% LOW
4% probability -14.15%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

12 May 2021, 14:06
Published
Vulnerability first disclosed
04 Aug 2024, 16:25
Last Modified
Vulnerability information updated

Description

A flaw was found in samba. Spaces used in a string around a domain name (DN), while supposed to be ignored, can cause invalid DN strings with spaces to instead write a zero-byte into out-of-bounds memory, resulting in a crash. The highest threat from this vulnerability is to system availability.

CVSS Metrics

  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • v2.0•MEDIUM•Score: 5AV:N/AC:L/Au:N/C:N/I:N/A:P

EPSS Trends

Current EPSS score: 3.83%• Percentile: 90%

Techniques & Countermeasures

  • CWE-125•Out-of-bounds Read

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

Affected Systems

  • alpine•samba

    ≥ 4.0.0, < 4.12.14-r0 | ≥ 4.0.0, < 4.13.7-r0 | ≥ 4.0.0, < 4.14.2-r0 | ≥ 4.0.0, < 4.14.2-r0 | ≥ 4.0.0, < 4.14.2-r0 | ≥ 4.0.0, < 4.14.2-r0 | ≥ 4.0.0, < 4.14.2-r0 | ≥ 4.0.0, < 4.14.2-r0 | ≥ 4.0.0, < 4.14.2-r0 | ≥ 4.0.0, < 4.14.2-r0 | ≥ 4.0.0, < 4.14.2-r0 | ≥ 4.0.0, < 4.14.2-r0 | ≥ 4.0.0, < 4.14.2-r0

  • debian•ldb

    < 2:2.2.0-3.1

  • debian•samba

    all | < 2:4.13.13+dfsg-1 | < 2:4.13.13+dfsg-1 | < 2:4.13.13+dfsg-1

  • debian•debian_linux

    9.0 | 10.0

  • fedoraproject•fedora

    32 | 33 | 34

  • samba•samba

    ≥ 4.0.0, < 4.12.13 | ≥ 4.13.0, < 4.13.6 | ≥ 4.14.0, < 4.14.1

References (11)