<p>Upgrade <code>Alpine:3.17</code> <code>openssl</code> to version 1.1.1g-r0 or higher.</p>

NULL Pointer Dereference Affecting openssl package, versions <1.1.1g-r0

Threat Intelligence

8.1% (95^th percentile)

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Snyk ID SNYK-ALPINE317-OPENSSL-3141037
published 21 Jul 2020
disclosed 21 Apr 2020

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Introduced: 21 Apr 2020

CVE-2020-1967 Open this link in a new tab CWE-476 Open this link in a new tab

How to fix?

Upgrade Alpine:3.17 openssl to version 1.1.1g-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:3.17 relevant fixed versions and status.

Server or client applications that call the SSL_check_chain() function during or after a TLS 1.3 handshake may crash due to a NULL pointer dereference as a result of incorrect handling of the "signature_algorithms_cert" TLS extension. The crash occurs if an invalid or unrecognised signature algorithm is received from the peer. This could be exploited by a malicious peer in a Denial of Service attack. OpenSSL version 1.1.1d, 1.1.1e, and 1.1.1f are affected by this issue. This issue did not affect OpenSSL versions prior to 1.1.1d. Fixed in OpenSSL 1.1.1g (Affected 1.1.1d-1.1.1f).

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)

High

NULL Pointer Dereference Affecting openssl package, versions <1.1.1g-r0

Severity

Snyk's Security Team recommends NVD's CVSS assessment