VulnerabilityModified
CVE-2021-23192
If a client to a Samba server sent a very large DCE/RPC request, and chose to fragment it, an attacker could replace later fragments with their own data, bypassing the signature requirements.
HIGH 7.5EPSS 1.95%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.95%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A flaw was found in the way samba implemented DCE/RPC. If a client to a Samba server sent a very large DCE/RPC request, and chose to fragment it, an attacker could replace later fragments with their own data, bypassing the signature requirements.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- EPSS
- 1.95% probability · 79th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- samba/samba
- Source
- secalert@redhat.com
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2019666Issue Tracking, Third Party Advisory
- https://security.gentoo.org/glsa/202309-06
- https://ubuntu.com/security/CVE-2021-23192Third Party Advisory
- https://www.samba.org/samba/security/CVE-2021-23192.htmlPatch, Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2019666Issue Tracking, Third Party Advisory
- https://security.gentoo.org/glsa/202309-06
- https://ubuntu.com/security/CVE-2021-23192Third Party Advisory
- https://www.samba.org/samba/security/CVE-2021-23192.htmlPatch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.