PT-2021-13878 · Libnbd+2 · Libnbd+2

Eric Blake · Published 2021-03-15 · Updated 2024-06-15 · CVE-2021-20286

Positive Technologies (AI Summary)

CVSS v2.0

4.0

Medium

Base vector

AV:N/AC:L/Au:S/C:N/I:N/A:P

Name of the Vulnerable Software and Affected Versions: libnbd version 1.7.3

Description: A flaw was found in libnbd that may lead to denial of service due to an assertion failure in the nbd unlocked opt go function in ilb/opt.c.

Recommendations: For libnbd version 1.7.3, consider disabling the nbd unlocked opt go function as a temporary workaround until a patch is available. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Assertion Failure

Weakness Enumeration

CWE-617

Related Identifiers

AZL-7265

CVE-2021-20286

OPENSUSE-SU-2021:2274-1

OPENSUSE-SU-2021_2274-1

OPENSUSE-SU-2024:10961-1

SUSE-SU-2021:2274-1

SUSE-SU-2021_2274-1

Affected Products

Debian

Suse

Libnbd

References · 17

• https://cve.org/CVERecord?id=CVE-2021-20286 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-20286 · Security Note
• https://osv.dev/vulnerability/CVE-2021-20286 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2021:2274-1 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2024:10961-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-20286 · Vendor Advisory
• https://gitlab.com/nbdkit/libnbd/-/commit/fb4440de9cc76e9c14bd3ddf3333e78621f40ad0 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-20286 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-20286 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-20286 · Vendor Advisory
• https://osv.dev/vulnerability/AZL-7265 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2021:2274-1 · Vendor Advisory
• https://lists.opensuse.org/archives/list/[e-mail]/thread/BNYSQCMH37A42AG5LXPHSQQ6STSS3ZPT · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=1934727 · Note
• https://t.me/cvenotify/11710 · Telegram Post