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Echo: openssl: security update to 3.5.4-1~deb13u2

medium Tenable Cloud Security Plugin ID 463957

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Issue summary: A type confusion vulnerability exists in the signature verification of signed PKCS#7 data
 where an ASN1_TYPE union member is accessed without first validating the type, causing an invalid or NULL
 pointer dereference when processing malformed PKCS#7 data. Impact summary: An application performing
 signature verification of PKCS#7 data or calling directly the PKCS7_digest_from_attributes() function can
 be caused to dereference an invalid or NULL pointer when reading, resulting in a Denial of Service. The
 function PKCS7_digest_from_attributes() accesses the message digest attribute value without validating its
 type. When the type is not V_ASN1_OCTET_STRING, this results in accessing invalid memory through the
 ASN1_TYPE union, causing a crash. Exploiting this vulnerability requires an attacker to provide a
 malformed signed PKCS#7 to an application that verifies it. The impact of the exploit is just a Denial of
 Service, the PKCS7 API is legacy and applications should be using the CMS API instead. For these reasons
 the issue was assessed as Low severity. The FIPS modules in 3.5, 3.4, 3.3 and 3.0 are not affected by this
 issue, as the PKCS#7 parsing implementation is outside the OpenSSL FIPS module boundary. OpenSSL 3.6, 3.5,
 3.4, 3.3, 3.0, 1.1.1 and 1.0.2 are vulnerable to this issue. (CVE-2026-22796)

Solution

Update the openssl library and its related packages to version 3.5.4-1~deb13u2 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-22796

Plugin Details

Severity: Medium

ID: 463957

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

CVSS v2

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4

Vector: CVSS2#AV:N/AC:H/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-22796

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 1/29/2026

Vulnerability Publication Date: 4/9/2024

Reference Information

CVE: CVE-2026-22796

IAVA: 2026-A-0087-S