Vulnerability Monitor

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CVE-2020-36430

libass 0.15.x before 0.15.1 has a heap-based buffer overflow in decode_chars (called from decode_font and process_text) because the wrong integer data type is used for subtraction.

Published

2021-07-20T07:15:07.817

Last Modified

2024-11-21T05:29:29.613

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.8 (HIGH)

CVSSv2 Vector

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

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

8.6

Impact Score

6.4

Weaknesses

Type: Primary
CWE-787

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	libass_project	libass	< 0.15.1	Yes
Operating System	fedoraproject	fedora	34	Yes

References

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26674 Issue Tracking, Patch, Third Party Advisory ([email protected])
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/libass/OSV-2020-2099.yaml Third Party Advisory ([email protected])
https://github.com/libass/libass/commit/017137471d0043e0321e377ed8da48e45a3ec632 Patch, Third Party Advisory ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6JUXFQUJ32GWG5E46A63DFDCYJAF3VU6/ ([email protected])
https://security.gentoo.org/glsa/202208-13 Third Party Advisory ([email protected])
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26674 Issue Tracking, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/libass/OSV-2020-2099.yaml Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/libass/libass/commit/017137471d0043e0321e377ed8da48e45a3ec632 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6JUXFQUJ32GWG5E46A63DFDCYJAF3VU6/ (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/202208-13 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)