8.8

CVE-2020-25721: samba Improper Input Validation

Modified
AliasesALPINE-CVE-2020-25721UBUNTU-CVE-2020-25721DEBIAN-CVE-2020-25721
Published 16-03-2022Last modified 04-08-2024

Vulnerability summary

CVE-2020-25721 is a high (CVSS 8.8) Improper Input Validation vulnerability in samba. EPSS estimates a 2.20% chance of exploitation in the next 30 days, higher than 82.5% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 8.8, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
8.8/10
010
High · v3.1 (NVD)
EPSS score
2.20%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 8 · Related 6
DSA-5003-1MGASA-2021-0585OPENSUSE-SU-2021:3647-1OPENSUSE-SU-2024:11631-1SUSE-SU-2021:3647-1SUSE-SU-2022:0323-1

Timeline

  1. 16-03-2022
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

Kerberos acceptors need easy access to stable AD identifiers (eg objectSid). Samba as an AD DC now provides a way for Linux applications to obtain a reliable SID (and samAccountName) in issued tickets.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

2.20%

Chance of exploitation in the next 30 days

Percentile

83%

Versus all other CVEs

30-day change

No change 0.00 pp

From 2.20% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Alpine1 product
  • samba≥ 4.13.0, < 4.13.17-r0 | ≥ 4.13.0, < 4.14.12-r0 | ≥ 4.13.0, < 4.15.2-r0
Debian1 product
  • samba< 2:4.13.14+dfsg-1
Samba1 product
  • samba≥ 4.13.0, < 4.13.14 | ≥ 4.14.0, < 4.14.10 | ≥ 4.15.0, < 4.15.2
Ubuntu1 product
  • sambaAll versions (No fix recorded) | < 2:4.13.14+dfsg-0ubuntu0.20.04.1 | < 2:4.13.14+dfsg-0ubuntu1

4 vendors · 4 products

References

10 links