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Echo: 7zip: security update to 22.01+really26.01+dfsg-0+deb12u1

medium Tenable Cloud Security Plugin ID 462672

Description

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

 - 7-Zip is a file archiver with a high compression ratio. Versions 9.11 through 26.00 contain a heap out-of-
 bounds read of up to 3 bytes in the UDF disc image handler's File Identifier Descriptor parser. In
 CFileId::Parse (CPP/7zip/Archive/Udf/UdfIn.cpp), after validating size < 38 + idLen + impLen and advancing
 processed to 38 + impLen + idLen, the alignment-padding loop reads p[processed] while incrementing up to 3
 times to reach a 4-byte boundary, and the processed <= size bounds check only runs after the loop. When
 (38 + impLen + idLen) % 4 != 0 and 38 + impLen + idLen == size, the loop reads 1 to 3 bytes past the end
 of the exact-size heap buffer allocated via buf.Alloc((size_t)item.Size). The UDF handler is registered
 for .iso and .udf files and auto-detected by signature, and the OOB read triggers during Open() when
 listing or extracting a crafted UDF image. Impact is limited to information disclosure (a 1-bit oracle per
 OOB byte via open/fail behavior) and denial of service (crash under hardened allocators); there is no
 write primitive. Version 26.01 fixes the issue. (CVE-2026-48102)

Solution

Update the 7zip library and its related packages to version 22.01+really26.01+dfsg-0+deb12u1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-48102

Plugin Details

Severity: Medium

ID: 462672

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

Temporal Score: 3.9

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

CVSS Score Source: CVE-2026-48102

CVSS v3

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.9

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

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

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/6/2026

Vulnerability Publication Date: 6/4/2026

Reference Information

CVE: CVE-2026-48102

IAVA: 2026-A-0525