VulnerabilityModified
CVE-2021-3716
A flaw was found in nbdkit due to to improperly caching plaintext state across the STARTTLS encryption boundary.
LOW 3.1EPSS 0.58%
Does this matter?
Lower severity and a low EPSS score (0.58%). Track it; it rarely justifies an emergency change on its own.
Description
A flaw was found in nbdkit due to to improperly caching plaintext state across the STARTTLS encryption boundary. A MitM attacker could use this flaw to inject a plaintext NBD_OPT_STRUCTURED_REPLY before proxying everything else a client sends to the server, potentially leading the client to terminate the NBD session. The highest threat from this vulnerability is to system availability.
- CVSS 3.1
- 3.1 LOWCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
- EPSS
- 0.58% probability · 46th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-924
- Affected
- nbdkit project/nbdkit · redhat/enterprise linux
- Source
- secalert@redhat.com
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1994695Issue Tracking, Patch, Third Party Advisory
- https://gitlab.com/nbdkit/nbdkit/-/commit/09a13dafb7bb3a38ab52eb5501cba786365ba7fdPatch, Third Party Advisory
- https://gitlab.com/nbdkit/nbdkit/-/commit/6c5faac6a37077cf2366388a80862bb00616d0d8Patch, Third Party Advisory
- https://listman.redhat.com/archives/libguestfs/2021-August/msg00083.htmlBroken Link
- https://www.openwall.com/lists/oss-security/2021/08/18/2Mailing List, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1994695Issue Tracking, Patch, Third Party Advisory
- https://gitlab.com/nbdkit/nbdkit/-/commit/09a13dafb7bb3a38ab52eb5501cba786365ba7fdPatch, Third Party Advisory
- https://gitlab.com/nbdkit/nbdkit/-/commit/6c5faac6a37077cf2366388a80862bb00616d0d8Patch, Third Party Advisory
- https://listman.redhat.com/archives/libguestfs/2021-August/msg00083.htmlBroken Link
- https://www.openwall.com/lists/oss-security/2021/08/18/2Mailing List, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.