csaf_opensuse - opensuse-su-2025-20133-1

OPENSUSE-SU-2025-20133-1

Vulnerability from csaf_opensuse - Published: 2025-12-02 13:51 - Updated: 2025-12-02 13:51

Summary

Security update for python-cbor2

Notes

Title of the patch

Security update for python-cbor2

Description of the patch

This update for python-cbor2 fixes the following issues: - CVE-2025-64076: Fixed bug in decode_definite_long_string() that causes incorrect chunk length calculation (bsc#1253746). Already fixed in release 5.6.3: - CVE-2024-26134: Fixed potential crash when hashing a CBORTag (bsc#1220096).

Patchnames

openSUSE-Leap-16.0-91

CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).

JSON

To clipboard

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CVE-2024-26134 (GCVE-0-2024-26134)

Vulnerability from cvelistv5 – Published: 2024-02-19 22:13 – Updated: 2025-02-13 17:41

Summary

cbor2 provides encoding and decoding for the Concise Binary Object Representation (CBOR) (RFC 8949) serialization format. Starting in version 5.5.1 and prior to version 5.6.2, an attacker can crash a service using cbor2 to parse a CBOR binary by sending a long enough object. Version 5.6.2 contains a patch for this issue.

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Assigner

GitHub_M

References

URL

Tags

	https://github.com/agronholm/cbor2/security/advis…	x_refsource_CONFIRM
	https://github.com/agronholm/cbor2/pull/204	x_refsource_MISC
	https://github.com/agronholm/cbor2/commit/387755e…	x_refsource_MISC
	https://github.com/agronholm/cbor2/commit/4de6991…	x_refsource_MISC
	https://github.com/agronholm/cbor2/releases/tag/5.6.2	x_refsource_MISC
	https://lists.fedoraproject.org/archives/list/pac…
	https://lists.fedoraproject.org/archives/list/pac…
	https://lists.fedoraproject.org/archives/list/pac…

Impacted products

	Vendor	Product	Version
	agronholm	cbor2	Affected: >= 5.5.1, < 5.6.2

Show details on NVD website

JSON

To clipboard

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          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/agronholm/cbor2/security/advisories/GHSA-375g-39jq-vq7m"
        },
        {
          "name": "https://github.com/agronholm/cbor2/pull/204",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/agronholm/cbor2/pull/204"
        },
        {
          "name": "https://github.com/agronholm/cbor2/commit/387755eacf0be35591a478d3c67fe10618a6d542",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/agronholm/cbor2/commit/387755eacf0be35591a478d3c67fe10618a6d542"
        },
        {
          "name": "https://github.com/agronholm/cbor2/commit/4de6991ba29bf2290d7b9d83525eda7d021873df",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/agronholm/cbor2/commit/4de6991ba29bf2290d7b9d83525eda7d021873df"
        },
        {
          "name": "https://github.com/agronholm/cbor2/releases/tag/5.6.2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/agronholm/cbor2/releases/tag/5.6.2"
        },
        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GX524ZG2XJWFV37UQKQ4LWIH4UICSGEQ/"
        },
        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BT42VXZMMMCSSHMA65KKPOZCXJEYHNR5/"
        },
        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PWC3VU6YV6EXKCSX5GTKWLBZIDIJNQJY/"
        }
      ],
      "source": {
        "advisory": "GHSA-375g-39jq-vq7m",
        "discovery": "UNKNOWN"
      },
      "title": "CBOR2 decoder has potential buffer overflow"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2024-26134",
    "datePublished": "2024-02-19T22:13:47.173Z",
    "dateReserved": "2024-02-14T17:40:03.687Z",
    "dateUpdated": "2025-02-13T17:41:03.627Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

CVE-2025-64076 (GCVE-0-2025-64076)

Vulnerability from cvelistv5 – Published: 2025-11-18 00:00 – Updated: 2025-11-19 13:55

Summary

Multiple vulnerabilities exist in cbor2 through version 5.7.0 in the decode_definite_long_string() function of the C extension decoder (source/decoder.c): (1) Integer Underflow Leading to Out-of-Bounds Read (CWE-191, CWE-125): An incorrect variable reference and missing state reset in the chunk processing loop causes buffer_length to not be reset to zero after UTF-8 character consumption. This results in subsequent chunk_length calculations producing negative values (e.g., chunk_length = 65536 - buffer_length), which are passed as signed integers to the read() method, potentially triggering unlimited read operations and resource exhaustion. (2) Memory Leak via Missing Reference Count Release (CWE-401): The main processing loop fails to release Python object references (Py_DECREF) for chunk objects allocated in each iteration. For CBOR strings longer than 65536 bytes, this causes cumulative memory leaks proportional to the payload size, enabling memory exhaustion attacks through repeated processing of large CBOR payloads. Both vulnerabilities can be exploited remotely without authentication by sending specially-crafted CBOR data containing definite-length text strings with multi-byte UTF-8 characters positioned at 65536-byte chunk boundaries. Successful exploitation results in denial of service through process crashes (CBORDecodeEOF exceptions) or memory exhaustion. The vulnerabilities affect all applications using cbor2's C extension to process untrusted CBOR data, including web APIs, IoT data collectors, and message queue processors. Fixed in commit 851473490281f82d82560b2368284ef33cf6e8f9 pushed with released version 5.7.1.

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AC:L/AV:N/A:H/C:N/I:N/PR:N/S:U/UI:N

CWE

Assigner

mitre

References

URL

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

OPENSUSE-SU-2025-20133-1

CVE-2024-26134 (GCVE-0-2024-26134)

CVE-2025-64076 (GCVE-0-2025-64076)

Tags

Sightings

Nomenclature