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Vulnerability · Published May 3, 2022 · Assigned by openssl

CVE-2022-1473Resource leakage when decoding certificates and keys

High 7.5

In plain English

A high-severity security flaw in OpenSSL from OpenSSL. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 4.7% (higher than 92% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)4.7%top 8.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

The OPENSSL_LH_flush() function, which empties a hash table, contains a bug that breaks reuse of the memory occuppied by the removed hash table entries. This function is used when decoding certificates or keys. If a long lived process periodically decodes certificates or keys its memory usage will expand without bounds and the process might be terminated by the operating system causing a denial of service. Also traversing the empty hash table entries will take increasingly more time. Typically such long lived processes might be TLS clients or TLS servers configured to accept client certificate authentication. The function was added in the OpenSSL 3.0 version thus older releases are not affected by the issue. Fixed in OpenSSL 3.0.3 (Affected 3.0.0,3.0.1,3.0.2).

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:9openssl1:3.0.1-41.el9_0ALSA-2022:6224
AlmaLinux:9openssl-devel1:3.0.1-41.el9_0ALSA-2022:6224
AlmaLinux:9openssl-libs1:3.0.1-41.el9_0ALSA-2022:6224
AlmaLinux:9openssl-perl1:3.0.1-41.el9_0ALSA-2022:6224
Alpine:v3.20openssl3.0.3-r0ALPINE-CVE-2022-1473
Alpine:v3.21openssl3.0.3-r0ALPINE-CVE-2022-1473
Alpine:v3.22openssl3.0.3-r0ALPINE-CVE-2022-1473
Alpine:v3.23openssl3.0.3-r0ALPINE-CVE-2022-1473
Alpine:v3.24openssl3.0.3-r0ALPINE-CVE-2022-1473
Ubuntu:22.04:LTSopenssl3.0.2-0ubuntu1.1USN-5402-1
Ubuntu:22.04:LTSopenssl3.0.2-0ubuntu1.1UBUNTU-CVE-2022-1473

Affected products (as reported)

VendorProductVersions
OpenSSL OpenSSL Fixed in OpenSSL 3.0.3 (Affected 3.0.0,3.0.1,3.0.2)

Weakness: CWE-459 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References