<p>Upgrade <code>Alpine:3.18</code> <code>openssl</code> to version 3.1.2-r0 or higher.</p>

Excessive Iteration Affecting openssl package, versions <3.1.2-r0

Threat Intelligence

0.13% (50^th percentile)

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Snyk ID SNYK-ALPINE318-OPENSSL-5821142
published 4 Aug 2023
disclosed 31 Jul 2023

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Introduced: 31 Jul 2023

CVE-2023-3817 Open this link in a new tab CWE-834 Open this link in a new tab

How to fix?

Upgrade Alpine:3.18 openssl to version 3.1.2-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Alpine. See How to fix? for Alpine:3.18 relevant fixed versions and status.

Issue summary: Checking excessively long DH keys or parameters may be very slow.

Impact summary: Applications that use the functions DH_check(), DH_check_ex() or EVP_PKEY_param_check() to check a DH key or DH parameters may experience long delays. Where the key or parameters that are being checked have been obtained from an untrusted source this may lead to a Denial of Service.

The function DH_check() performs various checks on DH parameters. After fixing CVE-2023-3446 it was discovered that a large q parameter value can also trigger an overly long computation during some of these checks. A correct q value, if present, cannot be larger than the modulus p parameter, thus it is unnecessary to perform these checks if q is larger than p.

An application that calls DH_check() and supplies a key or parameters obtained from an untrusted source could be vulnerable to a Denial of Service attack.

The function DH_check() is itself called by a number of other OpenSSL functions. An application calling any of those other functions may similarly be affected. The other functions affected by this are DH_check_ex() and EVP_PKEY_param_check().

Also vulnerable are the OpenSSL dhparam and pkeyparam command line applications when using the "-check" option.

The OpenSSL SSL/TLS implementation is not affected by this issue.

The OpenSSL 3.0 and 3.1 FIPS providers are not affected by this issue.

References

CVSS Scores

version 3.1

Attack Vector (AV)

Network
Attack Complexity (AC)

Low
Privileges Required (PR)

None
User Interaction (UI)

None

Scope (S)

Unchanged

Confidentiality (C)

None
Integrity (I)

None
Availability (A)

Low

Excessive Iteration Affecting openssl package, versions <3.1.2-r0

Severity

Snyk's Security Team recommends NVD's CVSS assessment