SUSE SLES15: libpython3_12-1_0 / python312 / python312-base / python312-curses / etc (SUSE-SU-2026:4534-1)

critical Nessus Plugin ID 363776

Synopsis

The remote SUSE host is missing one or more security updates.

Description

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:4534-1 advisory.

- CVE-2025-13462: incorrect parsing of TarInfo header when GNU long name and type AREGTYPE are combined (bsc#1259611).
- CVE-2026-0864: improper handling of line-ending characters can lead to configuration file injection when the `configparser` module is used (bsc#1269066).
- CVE-2026-1502: HTTP client proxy tunnel headers not validated for CR/LF (bsc#1261969).
- CVE-2026-2297: cpython: incorrectly handled hook in FileLoader can lead to validation bypass (bsc#1259240).
- CVE-2026-3276: quadratic complexity in `unicodedata.normalize()` can lead to DoS when processing specially crafted Unicode input (bsc#1267581).
- CVE-2026-4224: C stack overflow when parsing XML with deeply nested DTD content models (bsc#1259735).
- CVE-2026-4360: in the Tarfile.extract() function, the filter parameter is not passed properly when extracting hardlinks (bsc#1269959).
- CVE-2026-4519: leading dashes in URLs are accepted by the `webbrowser.open()` API and allow for web browser command line option injection (bsc#1260026).
- CVE-2026-6100: Arbitrary code execution or information disclosure via use-after-free in decompression modules (bsc#1262098).
- CVE-2026-7210: `xml.parsers.expat` and `xml.etree.ElementTree` use insufficient entropy for Expat hash- flooding protection (bsc#1264962).
- CVE-2026-7774: `tarfile.data_filter` path traversal bypass allows writing outside the extraction directory (bsc#1267821).
- CVE-2026-8328: `ftpcp()` does not use actual peer address and trusts server-supplied PASV host address (bsc#1265268).
- CVE-2026-9669: crafted input can cause a stack buffer overflow (bsc#1267974).
- CVE-2026-11940: tarfile extraction filter bypass via a crafted archive allows escaping the destination directory and enables arbitrary file reads and writes (bsc#1268977).
- CVE-2026-11972: infinite loop due to improper EOF handling in the tarfile module streaming mode can lead to DoS (bsc#1269788).
- CVE-2026-15308: Incremental HTMLParser allows CPU-exhaustion DoS via repeated unterminated markup declarations (bsc#1271192).
- CVE-2026-15310: memory exhaustion in zipfile in bzip2/LZMA/Zstandard decompression (bsc#1277111).
- CVE-2026-15806: urllib.request.HTTPPasswordMgr credentials for one URL scheme sent over another scheme (bsc#1276223).
- CVE-2026-17084: StringPrep algorithm considered Unicode codepoint attributes outside Unicode 3.2.0 (bsc#1276226).
- CVE-2026-19672: The tarfile module's tar and data extraction filters created directories outside the destination for members whose name leaves the destination and retu (bsc#1276227).

Changes for python312:

- Update to 3.12.14:
- Core and Builtins
- gh-139808: Add branch protections for AArch64 (BTI/PAC) in assembly code used by -X perf_jit (Linux perf profiler integration).
- Documentation
- gh-136155: We are now checking for fatal errors in EPUB builds in CI.
- Library
- gh-109638: Fix exponential time in csv.Sniffer.sniff() for a sample which contains many quote characters. A doubled quote character is now also detected in a field which contains the delimiter or a line break.
- gh-98820: Fix quadratic time in csv.Sniffer.sniff() for a sample which contains quoted fields, in particular for a single column of quoted fields.
- gh-149231: In tomllib, the number of parts in TOML keys is now limited.
- gh-146083: Update bundled libexpat to version 2.7.5.
- gh-141707: Don't change tarfile.TarInfo type from AREGTYPE to DIRTYPE when parsing GNU long name or link headers (bsc#1259611, CVE-2025-13462).
- gh-90949: Add SetBillionLaughsAttackProtectionActivationThreshold() and SetBillionLaughsAttackProtectionMaximumAmplification() to xmlparser objects to tune protections against billion laughs attacks. Patch by B?n?dikt Tran.
- Security
- gh-155558: Update bundled libexpat to version 2.8.3 for the fix to CVE 2026-72522.
- gh-153030: Fixed quadratic complexity in incremental parsing of long unterminated constructs (such as tags or comments) in html.parser.HTMLParser, which could be exploited for a denial of service (bsc#1271192, CVE-2026-15308).
- gh-152674: The xml.etree.ElementTree.Element methods findall(), iterfind() and find() avoid quadratic behavior when using XPath index predicates ([1], [last()], [last()-N]) on XML documents with many same-tag siblings.
- gh-152216: Update bundled libexpat to version 2.8.2.
- gh-151987: The tarfile.TarFile.extract() method now applies the given filter when it extracts a link target from the archive as a fallback (bsc#1269959, CVE-2026-4360).
- gh-151981: In tarfile, seeking a stream now stops when end of the stream is reached (bsc#1269788, CVE-2026-11972).
- gh-151544: Modules/Setup.local is no longer used as a landmark to discover whether Python is running in a source tree, as it could potentially affect actual installs. The pybuilddir.txt file is now the sole indicator of running in a source tree.
- gh-151558: Fixed an vulnerability in the tarfile data and tar extraction filters where crafted archives could create a symlink pointing outside the destination directory. This was a bypass of CVE 2025-4330 (bsc#1268977, CVE-2026-11940).
- gh-150599: Fix a possible stack buffer overflow in bz2 when a bz2.BZ2Decompressor is reused after a decompression error. The decompressor now becomes unusable after libbz2 reports an error (bsc#1267974, CVE-2026-9669).
- gh-150743: http.client now limits the number of chunked-response trailer lines it will read to 100, and the number of interim (1xx) responses it will skip to 100.
A malicious or broken server could previously stream trailer lines or 100 Continue responses forever, hanging the client even when a socket timeout was in use. Reported by @YLChen-007 via GHSA-w4q2-g22w-6fr4.
- gh-149698: Update bundled libexpat to version 2.8.1 for the fix for CVE 2026-45186.
- gh-87451: The ftplib module's undocumented ftpcp function no longer trusts the IPv4 address value returned from the source server in response to the PASV command by default, completing the fix for CVE-2021-4189. As with ftplib.FTP, the former behavior can be re-enabled by setting the trust_server_pasv_ipv4_address attribute on the source ftplib.FTP instance to True. Thanks to Qi Deng at Aurascape AI for the report (bsc#1265268, CVE-2026-8328).
- gh-149486: tarfile.data_filter() now validates link targets using the same normalised value that is written to disk, strips trailing separators from the member name when resolving a symlink's directory, and rejects link members that would replace the destination directory itself. This closes several path-traversal bypasses of the data extraction filter (bsc#1267821, CVE-2026-7774).
- gh-149079: Fix a potential denial of service in unicodedata.normalize(). The canonical ordering step of Unicode normalization used a quadratic-time insertion sort for reordering combining characters, which could be exploited with crafted input containing many combining characters in non-canonical order. Replaced with a linear-time counting sort for long runs (bsc#1267581, CVE-2026-3276).
- gh-149018: Improved protection against XML hash-flooding attacks in xml.parsers.expat and xml.etree.ElementTree when Python is compiled with libExpat 2.8.0 or later (bsc#1264962, CVE-2026-7210).
- gh-149017: Update bundled libexpat to version 2.8.0.
- gh-148808: Added buffer boundary check when using nbytes parameter with asyncio.AbstractEventLoop.sock_recvfrom_into(). Only relevant for Windows and the asyncio.ProactorEventLoop.
- gh-148395: Fix a dangling input pointer in lzma.LZMADecompressor, bz2.BZ2Decompressor, and internal zlib._ZlibDecompressor when memory allocation fails with MemoryError, which could let a subsequent decompress() call read or write through a stale pointer to the already-released caller buffer (bsc#1262098, CVE-2026-6100, seems like it has been incompletely applied gh#python/cpython#151605).
- gh-148169: A bypass in webbrowser allowed URLs prefixed with %action to pass the dash-prefix safety check (bsc#1262098, CVE-2026-6100).
- gh-146581: Fix vulnerability in shutil.unpack_archive() for ZIP files on Windows which allowed to write files outside of the destination tree if the patch in the archive contains a Windows drive prefix. Now such invalid paths will be skipped. Files containing '..' in the name (like 'foo..bar') are no longer skipped.
- gh-146333: Fix quadratic backtracking in configparser.RawConfigParser option parsing regexes (OPTCRE and OPTCRE_NV). A crafted configuration line with many whitespace characters could cause excessive CPU usage.
- gh-146211: Reject CR/LF characters in tunnel request headers for the HTTPConnection.set_tunnel() method (bsc#1261969, CVE-2026-1502).
- gh-145986: xml.parsers.expat: Fixed a crash caused by unbounded C recursion when converting deeply nested XML content models with ElementDeclHandler(). This addresses CVE 2026-4224 (bsc#1259735, CVE-2026-4224).
- gh-145599: Reject control characters in http.cookies.Morsel update() and js_output(). This addresses CVE 2026-3644.
- gh-145506: Fixes CVE 2026-2297 by ensuring that SourcelessFileLoader uses io.open_code() when opening .pyc files (bsc#1259240, CVE-2026-2297).
- gh-144370: Disallow usage of control characters in status in wsgiref.handlers to prevent HTTP header injections.
Patch by Benedikt Johannes.
- gh-143930: Reject leading dashes in URLs passed to webbrowser.open() (bsc#1260026, CVE-2026-4519).
- gh-143927: Normalize all line endings (CR, CRLF, and LF) to LF+TAB when writing multi-line configparser values (bsc#1269066, CVE-2026-0864).
- Tests
- gh-149776: Fix test_socket on Linux kernel 7.1 and newer:
skip UDP Lite tests if it's not supported. Patch by Victor Stinner.

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

Plugin Details

Severity: Critical

ID: 363776

File Name: suse_SU-2026-4534-1.nasl

Version: 1.1

Type: Local

Agent: unix

Family: SuSE Local Security Checks

Published: 10/7/2026

Updated: 10/7/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.9

Percentile: 96.5

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

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

CVSS Score Source: CVE-2026-3644

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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

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

CVSS v4

Risk Factor: Critical

Base Score: 9.1

Threat Score: 8.1

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS Score Source: CVE-2026-6100

Vulnerability Information

CPE: cpe:/o:novell:suse_linux:15, p-cpe:/a:novell:suse_linux:libpython3_12-1_0, p-cpe:/a:novell:suse_linux:python312-base, p-cpe:/a:novell:suse_linux:python312-curses, p-cpe:/a:novell:suse_linux:python312-dbm, p-cpe:/a:novell:suse_linux:python312-devel, p-cpe:/a:novell:suse_linux:python312-idle, p-cpe:/a:novell:suse_linux:python312-tk, p-cpe:/a:novell:suse_linux:python312-tools, p-cpe:/a:novell:suse_linux:python312

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/6/2026

Vulnerability Publication Date: 8/24/2021

Reference Information

CVE: CVE-2021-4189, CVE-2025-13462, CVE-2025-4330, CVE-2026-0864, CVE-2026-11940, CVE-2026-11972, CVE-2026-1502, CVE-2026-15308, CVE-2026-15310, CVE-2026-15806, CVE-2026-17084, CVE-2026-19672, CVE-2026-2297, CVE-2026-3276, CVE-2026-3644, CVE-2026-4224, CVE-2026-4360, CVE-2026-45186, CVE-2026-4519, CVE-2026-4786, CVE-2026-6100, CVE-2026-7210, CVE-2026-72522, CVE-2026-7774, CVE-2026-8328, CVE-2026-9669

IAVA: 2026-A-0142-S, 2026-A-0360-S, 2026-A-0549-S, 2026-A-0890

SuSE: SUSE-SU-2026:4534-1

Detections

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