CVE-2023-4154: Samba: ad dc password exposure to privileged users and rodcs
Vulnerability summary
CVE-2023-4154 is a high (CVSS 7.5) Out-of-bounds Write vulnerability in samba. EPSS estimates a 1.40% chance of exploitation in the next 30 days, higher than 72.5% of scored vulnerabilities.
Not severe (CVSS 7.5, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 6 · Related 6Timeline
- 07-11-2023PublishedVulnerability first disclosed.
- 02-08-2024Last modifiedVulnerability information updated.
Description
A design flaw was found in Samba's DirSync control implementation, which exposes passwords and secrets in Active Directory to privileged users and Read-Only Domain Controllers (RODCs). This flaw allows RODCs and users possessing the GET_CHANGES right to access all attributes, including sensitive secrets and passwords. Even in a default setup, RODC DC accounts, which should only replicate some passwords, can gain access to all domain secrets, including the vital krbtgt, effectively eliminating the RODC / DC distinction. Furthermore, the vulnerability fails to account for error conditions (fail open), like out-of-memory situations, potentially granting access to secret attributes, even under low-privileged attacker influence.
CVSS metrics
5 scores · 5 sources · 1 version- OSV · AlpineEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:NDiffers
- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:NDiffers
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:NDiffers
- NVDNIST6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:NDiffers
EPSS trend
Probability
1.40%
Chance of exploitation in the next 30 days
Percentile
73%
Versus all other CVEs
30-day change
Increase +0.25 pp
From 1.15% on 05-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Alpine1 product
- samba≥ 4.0.0, < 4.18.8-r0
Debian1 product
- samba< 2:4.17.12+dfsg-0+deb12u1 | < 2:4.19.1+dfsg-1
Samba1 product
- samba≥ 4.0.0, < 4.17.12 | ≥ 4.18.0, < 4.18.8 | ≥ 4.19.0, < 4.19.1
Ubuntu1 product
- sambaAll versions (No fix recorded) | < 2:4.15.13+dfsg-0ubuntu0.20.04.6 | < 2:4.15.13+dfsg-0ubuntu1.5 | < 2:4.18.6+dfsg-1ubuntu2.1
4 vendors · 4 products
