Calls to EVP_CipherUpdate, EVP_EncryptUpdate and EVP_DecryptUpdate may overflow the output length argument in some cases where the input length is close to the maximum permissable length for an integer on the platform. In such cases the return value from the function call will be 1 (indicating success), but the output length value will be negative. This could cause applications to behave incorrectly or crash. OpenSSL versions 1.1.1i and below are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1j. OpenSSL versions 1.0.2x and below are affected by this issue. However OpenSSL 1.0.2 is out of support and no longer receiving public updates. Premium support customers of OpenSSL 1.0.2 should upgrade to 1.0.2y. Other users should upgrade to 1.1.1j. Fixed in OpenSSL 1.1.1j (Affected 1.1.1-1.1.1i). Fixed in OpenSSL 1.0.2y (Affected 1.0.2-1.0.2x).

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-2563-1 openssl security update
Debian DLA Debian DLA DLA-2565-1 openssl1.0 security update
Debian DSA Debian DSA DSA-4855-1 openssl security update
EUVD EUVD EUVD-2021-1843 Calls to EVP_CipherUpdate, EVP_EncryptUpdate and EVP_DecryptUpdate may overflow the output length argument in some cases where the input length is close to the maximum permissable length for an integer on the platform. In such cases the return value from the function call will be 1 (indicating success), but the output length value will be negative. This could cause applications to behave incorrectly or crash. OpenSSL versions 1.1.1i and below are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1j. OpenSSL versions 1.0.2x and below are affected by this issue. However OpenSSL 1.0.2 is out of support and no longer receiving public updates. Premium support customers of OpenSSL 1.0.2 should upgrade to 1.0.2y. Other users should upgrade to 1.1.1j. Fixed in OpenSSL 1.1.1j (Affected 1.1.1-1.1.1i). Fixed in OpenSSL 1.0.2y (Affected 1.0.2-1.0.2x).
Github GHSA Github GHSA GHSA-qgm6-9472-pwq7 Integer Overflow in openssl-src
Ubuntu USN Ubuntu USN USN-4738-1 OpenSSL vulnerabilities
Ubuntu USN Ubuntu USN USN-5088-1 EDK II vulnerabilities
Ubuntu USN Ubuntu USN USN-7018-1 OpenSSL vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Sun, 08 Sep 2024 18:30:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:acm:2.2::el7

Mon, 19 Aug 2024 22:15:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:acm:2.2::el7
cpe:/a:redhat:acm:2.2::el8

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: openssl

Published:

Updated: 2024-09-17T02:16:35.124Z

Reserved: 2021-01-12T00:00:00

Link: CVE-2021-23840

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-02-16T17:15:13.300

Modified: 2024-11-21T05:51:55.210

Link: CVE-2021-23840

cve-icon Redhat

Severity : Moderate

Publid Date: 2021-02-16T00:00:00Z

Links: CVE-2021-23840 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses