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Echo: openssl: security update to 3.5.7-1~deb13u2

high Tenable Cloud Security Plugin ID 464267

Description

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

 - Issue summary: Receiving a DTLS record for a future epoch while a handshake is in progress causes OpenSSL
 to buffer far more memory than the record itself requires. Impact summary: A peer can use a small amount
 of network traffic to make an OpenSSL DTLS endpoint retain a disproportionately large amount of memory,
 which may lead to a Denial of Service. CWE: CWE-405: Asymmetric Resource Consumption (Amplification)
 Description: While a DTLS handshake is in progress, a peer may legitimately have already moved on to the
 next epoch (for example, having sent its ChangeCipherSpec and Finished messages) before the local endpoint
 has processed the same transition, typically because of reordering on the underlying UDP transport.
 OpenSSL buffers such early records so that they can be processed once the local endpoint catches up.
 Buffering a record currently retains the entire read buffer it arrived in, which is sized to hold the
 largest possible DTLS record (around 16 kilobytes), rather than just the bytes that make up the record
 itself. Up to 100 such records may be buffered per connection. As a result, a peer that sends a stream of
 small forged records claiming to belong to the next epoch can cause an OpenSSL DTLS endpoint to retain
 around 1.7 megabytes of memory, despite sending only a small fraction of that amount of data over the
 network. An attacker therefore gains a memory amplification factor of around 1200, and can multiply the
 effect across as many associations as it is able to open, making this a remote memory exhaustion Denial of
 Service risk for DTLS servers. Since the memory retained per connection remains bounded, and any limit an
 application already places on the number of concurrent associations also bounds the total exposure, this
 issue has been assessed as Low severity. FIPS impact: no No FIPS modules are affected by this issue as the
 affected code is outside the OpenSSL FIPS module boundary. OpenSSL 4.0, 3.6, 3.5, 3.4, 3.0, 1.1.1 and
 1.0.2 are vulnerable to this issue. OpenSSL 4.0 users should upgrade to OpenSSL 4.0.2. OpenSSL 3.6 users
 should upgrade to OpenSSL 3.6.4. OpenSSL 3.5 users should upgrade to OpenSSL 3.5.8. OpenSSL 3.4 users
 should upgrade to OpenSSL 3.4.7. OpenSSL 3.0 users should upgrade to OpenSSL 3.0.22. Premium support
 customers only: OpenSSL 1.1.1 users should upgrade to OpenSSL 1.1.1zi OpenSSL 1.0.2 users should upgrade
 to OpenSSL 1.0.2zr This issue was reported on 18 May 2026 by Amazon Web Services. The fix has been
 developed by Matt Caswell. -- cut (non-publishing metadata for internal use) -- Reported by: Amazon Web
 Services Fixed by: Matt Caswell (CVE-2026-54874)

Solution

Update the openssl library and its related packages to version 3.5.7-1~deb13u2 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-54874

Plugin Details

Severity: High

ID: 464267

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.6

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-54874

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 8/26/2026

Vulnerability Publication Date: 8/5/2026

Reference Information

CVE: CVE-2026-54874

IAVA: 2026-A-0878-S