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Echo: openssl: security update to 3.5.7-1~deb13u3

medium Tenable Cloud Security Plugin ID 461344

Description

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

 - Issue summary: An established DTLS 1.2 association using an AEAD cipher suite can be terminated by a
 single unauthenticated datagram whose encrypted fragment is shorter than the mandatory explicit IV and
 authentication tag overhead. Impact summary: An attacker who can send a datagram that is routed to an
 existing DTLS 1.2 association can tear that association down without knowing any key material. This is a
 Denial of Service limited to the targeted association. There is no memory safety or confidentiality
 impact. CWE: CWE-1284: Improper Validation of Specified Quantity in Input Description: In TLS 1.2 and DTLS
 1.2 every record protected by an AEAD cipher suite carries an explicit IV followed by the ciphertext and
 an authentication tag. When decrypting such a record the record layer passed the record length to the
 cipher implementation before checking that the record was long enough to contain the explicit IV and the
 tag. For a record shorter than that overhead the cipher implementation rejected the impossible length, and
 the record layer treated this as an internal failure and raised a fatal internal_error alert instead of
 treating the record as one that failed authentication. In TLS 1.2 the same record causes a fatal
 internal_error alert instead of the expected bad_record_mac alert. Since any undecryptable record already
 terminates a TLS connection, this is a protocol conformance issue rather than a security issue in TLS. The
 fix validates the record length against the explicit IV and tag length before any AEAD processing, so that
 TLS reports bad_record_mac and DTLS silently discards the record. FIPS impact: no The affected code is
 outside the FIPS module boundary. (CVE-2026-75806)

Solution

Update the openssl library and its related packages to version 3.5.7-1~deb13u3 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-75806

Plugin Details

Severity: Medium

ID: 461344

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4

Percentile: 53.37

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2026-75806

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: 9/30/2026

Vulnerability Publication Date: 9/29/2026

Reference Information

CVE: CVE-2026-75806

IAVA: 2026-A-1072