ALT-PU-2016-1931-3

Package update libebml in branch sisyphus

Version1.3.4-alt1

Published2026-10-14

Max severityCRITICAL

Severity:

Closed issues (3)

CRITICAL9.6

Use-after-free vulnerability in the EbmlMaster::Read function in libEBML before 1.3.3 allows context-dependent attackers to have unspecified impact via a "deeply nested element with infinite size" followed by another element of an upper level in an EBML document.

Published: 2016-01-29Modified: 2026-06-16

CVSS 2.0CRITICAL 9.3

CVSS:2.0/AV:N/AC:M/Au:N/C:C/I:C/A:C

CVSS 3.xCRITICAL 9.6

CVSS:3.x/CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

References

MEDIUM4.3

The EbmlUnicodeString::UpdateFromUTF8 function in libEBML before 1.3.3 allows context-dependent attackers to obtain sensitive information from process heap memory via a crafted UTF-8 string, which triggers an invalid memory access.

Published: 2016-01-29Modified: 2026-06-16

CVSS 2.0MEDIUM 4.3

CVSS:2.0/AV:N/AC:M/Au:N/C:P/I:N/A:N

CVSS 3.xMEDIUM 4.3

CVSS:3.x/CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

References

MEDIUM4.3

The EbmlElement::ReadCodedSizeValue function in libEBML before 1.3.3 allows context-dependent attackers to obtain sensitive information from process heap memory via a crafted length value in an EBML id, which triggers an invalid memory access.

Published: 2016-01-29Modified: 2026-06-16

CVSS 2.0MEDIUM 4.3

CVSS:2.0/AV:N/AC:M/Au:N/C:P/I:N/A:N

CVSS 3.xMEDIUM 4.3

CVSS:3.x/CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

References