Detections
Analytics

Echo: openssl-1.1.1c: security update to 1.1.1c+e1openssl-1.1.1g: security update to 1.1.1g+e1openssl-1.1.1k: security update to 1.1.1k+e1openssl-3.0.9: security update to 3.0.9+e1openssl-3.1.0: security update to 3.1.0+e1openssl-3.5.0: security update to 3.5.0+e1

high Tenable Self-Hosted Container Security Plugin ID 478530

Description

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

 - Issue summary: A signed integer overflow when sizing the destination buffer for Unicode output in
 ASN1_mbstring_ncopy() can lead to a heap buffer overflow. Impact summary: A heap buffer overflow may lead
 to a crash or possibly attacker controlled code execution or other undefined behaviour. In
 ASN1_mbstring_copy() and ASN1_mbstring_ncopy() the destination size for Unicode output is computed in a
 signed int: by left shift of the input character count for BMPSTRING (UTF-16) and UNIVERSALSTRING
 (UTF-32), and by summing per-character byte counts for UTF8STRING. The calculation overflows when the
 input reaches around 2^30 characters. In the worst case (UNIVERSALSTRING at 2^30 characters) the size
 wraps to zero, OPENSSL_malloc(1) is called, and the subsequent character copy writes several gigabytes
 past the one-byte allocation. X.509 certificate processing routes through ASN1_STRING_set_by_NID(), whose
 DIRSTRING_TYPE mask excludes UNIVERSALSTRING and whose per-NID size limits cap the input length; no
 network protocol or certificate-handling path in OpenSSL exercises the overflow. Triggering the bug
 requires an application that calls ASN1_mbstring_copy() or ASN1_mbstring_ncopy() directly, or registers a
 custom string type via ASN1_STRING_TABLE_add(), with attacker-controlled input on the order of half a
 gigabyte or more. For these reasons this issue was assigned Low severity. The FIPS modules in 4.0, 3.6,
 3.5, 3.4 and 3.0 are not affected by this issue, as the affected code is outside the OpenSSL FIPS module
 boundary. (CVE-2026-7383)

Solution

Update the openssl-1.1.1c library and its related packages to version 1.1.1c+e1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-7383

Plugin Details

Severity: High

ID: 478530

Version: Revision 1.1

Type: Local

Published: 11/5/2026

Updated: 11/5/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.18

CVSS v2

Risk Factor: High

Base Score: 7.6

Temporal Score: 5.6

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

CVSS Score Source: CVE-2026-7383

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/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: 11/5/2026

Vulnerability Publication Date: 6/9/2026

Reference Information

CVE: CVE-2026-7383