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Vulnerability · Published Jul 20, 2022 · Assigned by mitre

CVE-2021-46828

High 7.5

In plain English

A high-severity security flaw in the libtirpc package (AlmaLinux). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 3.2% (higher than 88% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)3.2%top 11.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

In libtirpc before 1.3.3rc1, remote attackers could exhaust the file descriptors of a process that uses libtirpc because idle TCP connections are mishandled. This can, in turn, lead to an svc_run infinite loop without accepting new connections.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:9libtirpc1.3.3-0.el9ALSA-2022:8400
AlmaLinux:9libtirpc-devel1.3.3-0.el9ALSA-2022:8400
Alpine:v3.20libtirpc1.3.2-r2ALPINE-CVE-2021-46828
Alpine:v3.21libtirpc1.3.2-r2ALPINE-CVE-2021-46828
Alpine:v3.22libtirpc1.3.2-r2ALPINE-CVE-2021-46828
Alpine:v3.23libtirpc1.3.2-r2ALPINE-CVE-2021-46828
Alpine:v3.24libtirpc1.3.2-r2ALPINE-CVE-2021-46828
Debian:12libtirpc1.3.2-2.1DEBIAN-CVE-2021-46828
Debian:13libtirpc1.3.2-2.1DEBIAN-CVE-2021-46828
Debian:14libtirpc1.3.2-2.1DEBIAN-CVE-2021-46828
Rocky Linux:9libtirpc0:1.3.3-0.el9RLSA-2022:8400
Ubuntu:22.04:LTSlibtirpc1.3.2-2ubuntu0.1UBUNTU-CVE-2021-46828
Ubuntu:22.04:LTSlibtirpc1.3.2-2ubuntu0.1USN-5538-1

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

Weakness: CWE-755 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References