Vulnerability-Lookup

UBUNTU-CVE-2025-9300 (CVE-2025-9300)

Vulnerability from osv_ubuntu – Published: 2025-08-21 13:15 – Updated: 2026-05-20 15:16 – Source website

Details

A vulnerability was found in saitoha libsixel up to 1.10.3. Affected by this issue is the function sixel_debug_print_palette of the file src/encoder.c of the component img2sixel. The manipulation results in stack-based buffer overflow. The attack must be initiated from a local position. The exploit has been made public and could be used. The patch is identified as 316c086e79d66b62c0c4bc66229ee894e4fdb7d1. Applying a patch is advised to resolve this issue.

Severity

5.3 (Medium)


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

7.8 (High)


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

1.9 (Low)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2025-9300	REPORT
	https://www.cve.org/CVERecord?id=CVE-2025-9300	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libsixel-bin",
            "binary_version": "1.5.2-2"
          },
          {
            "binary_name": "libsixel1",
            "binary_version": "1.5.2-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "libsixel",
        "purl": "pkg:deb/ubuntu/libsixel@1.5.2-2?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.4.2-1",
        "1.5.2-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libsixel-bin",
            "binary_version": "1.7.3-1"
          },
          {
            "binary_name": "libsixel-examples",
            "binary_version": "1.7.3-1"
          },
          {
            "binary_name": "libsixel1",
            "binary_version": "1.7.3-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "libsixel",
        "purl": "pkg:deb/ubuntu/libsixel@1.7.3-1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.5.2-2",
        "1.7.3-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libsixel-bin",
            "binary_version": "1.8.2-2.1"
          },
          {
            "binary_name": "libsixel-examples",
            "binary_version": "1.8.2-2.1"
          },
          {
            "binary_name": "libsixel1",
            "binary_version": "1.8.2-2.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "libsixel",
        "purl": "pkg:deb/ubuntu/libsixel@1.8.2-2.1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.8.2-1",
        "1.8.2-2.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libsixel-bin",
            "binary_version": "1.10.3-3"
          },
          {
            "binary_name": "libsixel-examples",
            "binary_version": "1.10.3-3"
          },
          {
            "binary_name": "libsixel1",
            "binary_version": "1.10.3-3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "libsixel",
        "purl": "pkg:deb/ubuntu/libsixel@1.10.3-3?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.8.6-2",
        "1.10.3-2",
        "1.10.3-3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libsixel-bin",
            "binary_version": "1.10.3-3build1"
          },
          {
            "binary_name": "libsixel-examples",
            "binary_version": "1.10.3-3build1"
          },
          {
            "binary_name": "libsixel1",
            "binary_version": "1.10.3-3build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "libsixel",
        "purl": "pkg:deb/ubuntu/libsixel@1.10.3-3build1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.10.3-3",
        "1.10.3-3build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libsixel-bin",
            "binary_version": "1.10.5-1"
          },
          {
            "binary_name": "libsixel-examples",
            "binary_version": "1.10.5-1"
          },
          {
            "binary_name": "libsixel1",
            "binary_version": "1.10.5-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "libsixel",
        "purl": "pkg:deb/ubuntu/libsixel@1.10.5-1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.10.5-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libsixel-bin",
            "binary_version": "1.10.5-1build1"
          },
          {
            "binary_name": "libsixel-examples",
            "binary_version": "1.10.5-1build1"
          },
          {
            "binary_name": "libsixel1",
            "binary_version": "1.10.5-1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "libsixel",
        "purl": "pkg:deb/ubuntu/libsixel@1.10.5-1build1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.10.5-1",
        "1.10.5-1build1"
      ]
    }
  ],
  "aliases": [],
  "details": "A vulnerability was found in saitoha libsixel up to 1.10.3. Affected by this issue is the function sixel_debug_print_palette of the file src/encoder.c of the component img2sixel. The manipulation results in stack-based buffer overflow. The attack must be initiated from a local position. The exploit has been made public and could be used. The patch is identified as 316c086e79d66b62c0c4bc66229ee894e4fdb7d1. Applying a patch is advised to resolve this issue.",
  "id": "UBUNTU-CVE-2025-9300",
  "modified": "2026-05-20T15:16:00Z",
  "published": "2025-08-21T13:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-9300"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-9300"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2025-9300"
  ]
}

CVE-2025-9300 (GCVE-0-2025-9300)

Vulnerability from cvelistv5 – Published: 2025-08-21 13:02 – Updated: 2025-08-21 14:46

Title

saitoha libsixel img2sixel encoder.c sixel_debug_print_palette stack-based overflow

Summary

Severity

4.8 (Medium)


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

5.3 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C

5.3 (Medium)


                        
                          CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-08-21 13:22 UTC

CWE

CWE-121 - Stack-based Buffer Overflow
CWE-119 - Memory Corruption

Assigner

VulDB mitre root

References

7 references

URL	Tags
https://vuldb.com/?id.320905	vdb-entrytechnical-description
https://vuldb.com/?ctiid.320905	signaturepermissions-required
https://vuldb.com/?submit.632366	third-party-advisory
https://github.com/saitoha/libsixel/issues/200	issue-tracking
https://github.com/saitoha/libsixel/issues/200#is…	issue-tracking
https://drive.google.com/file/d/1IIvvRFgUQZcySqeo…	exploit
https://github.com/saitoha/libsixel/commit/316c08…	patch

Impacted products

1 product

Vendor	Product	Version
saitoha	libsixel	Affected: 1.10.0 Affected: 1.10.1 Affected: 1.10.2 Affected: 1.10.3

Credits

xdcao (VulDB User)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-9300",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-08-21T13:22:45.636966Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-08-21T14:46:37.782Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://vuldb.com/?submit.632366"
          },
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/saitoha/libsixel/issues/200#issuecomment-3178785635"
          },
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/saitoha/libsixel/commit/316c086e79d66b62c0c4bc66229ee894e4fdb7d1"
          },
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/saitoha/libsixel/issues/200"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "modules": [
            "img2sixel"
          ],
          "product": "libsixel",
          "vendor": "saitoha",
          "versions": [
            {
              "status": "affected",
              "version": "1.10.0"
            },
            {
              "status": "affected",
              "version": "1.10.1"
            },
            {
              "status": "affected",
              "version": "1.10.2"
            },
            {
              "status": "affected",
              "version": "1.10.3"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "xdcao (VulDB User)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability was found in saitoha libsixel up to 1.10.3. Affected by this issue is the function sixel_debug_print_palette of the file src/encoder.c of the component img2sixel. The manipulation results in stack-based buffer overflow. The attack must be initiated from a local position. The exploit has been made public and could be used. The patch is identified as 316c086e79d66b62c0c4bc66229ee894e4fdb7d1. Applying a patch is advised to resolve this issue."
        },
        {
          "lang": "de",
          "value": "Es wurde eine Schwachstelle in saitoha libsixel bis 1.10.3 entdeckt. Das betrifft die Funktion sixel_debug_print_palette der Datei src/encoder.c der Komponente img2sixel. Die Manipulation f\u00fchrt zu stack-based buffer overflow. Der Angriff muss lokal durchgef\u00fchrt werden. Der Exploit steht zur \u00f6ffentlichen Verf\u00fcgung. Der Name des Patches ist 316c086e79d66b62c0c4bc66229ee894e4fdb7d1. Als bestm\u00f6gliche Massnahme wird Patching empfohlen."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "baseScore": 4.8,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P",
            "version": "4.0"
          }
        },
        {
          "cvssV3_1": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C",
            "version": "3.1"
          }
        },
        {
          "cvssV3_0": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C",
            "version": "3.0"
          }
        },
        {
          "cvssV2_0": {
            "baseScore": 4.3,
            "vectorString": "AV:L/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:OF/RC:C",
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      "problemTypes": [
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        {
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            "technical-description"
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          "url": "https://vuldb.com/?id.320905"
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        {
          "name": "VDB-320905 | CTI Indicators (IOB, IOC, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/?ctiid.320905"
        },
        {
          "name": "Submit #632366 | LibSixel  img2sixel  LibSixel version 1.10.3 (commit 6dd664c) compiled on Aug 2 2025 and the newest master version. Heap Buffer Overflow",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/?submit.632366"
        },
        {
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/saitoha/libsixel/issues/200"
        },
        {
          "tags": [
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          ],
          "url": "https://github.com/saitoha/libsixel/issues/200#issuecomment-3178785635"
        },
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          "url": "https://drive.google.com/file/d/1IIvvRFgUQZcySqeoqXXhsxd0HZCjClJ7/view?usp=sharing"
        },
        {
          "tags": [
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          "value": "Advisory disclosed"
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        {
          "lang": "en",
          "time": "2025-08-21T02:00:00.000Z",
          "value": "VulDB entry created"
        },
        {
          "lang": "en",
          "time": "2025-08-21T07:30:11.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "saitoha libsixel img2sixel encoder.c sixel_debug_print_palette stack-based overflow"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2025-9300",
    "datePublished": "2025-08-21T13:02:08.108Z",
    "dateReserved": "2025-08-21T05:25:08.724Z",
    "dateUpdated": "2025-08-21T14:46:37.782Z",
    "state": "PUBLISHED"
  },
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}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

UBUNTU-CVE-2025-9300 (CVE-2025-9300)

CVE-2025-9300 (GCVE-0-2025-9300)

Tags

Sightings

Nomenclature

Related by attack behaviour