Bug 1177862 – VUL-0: CVE-2020-26682: libass: signed integer overflow in the call to outline_stroke() from ass_outline_construct()

Bug 1177862 - (CVE-2020-26682) VUL-0: CVE-2020-26682: libass: signed integer overflow in the call to outline_stroke() from ass_outline_construct()

(CVE-2020-26682)
Summary:	VUL-0: CVE-2020-26682: libass: signed integer overflow in the call to outline...

Status:	NEW

Classification:	Novell Products
Product:	SUSE Security Incidents
Classification:	Novell Products
Component:	Incidents
Version:	unspecified
Hardware:	Other Other

Priority:	P3 - Medium Severity: Major
Target Milestone:	---
Assigned To:	Security Team bot
QA Contact:	Security Team bot

URL:	https://smash.suse.de/issue/269427/
Whiteboard:	CVSSv3.1:SUSE:CVE-2020-26682:7.8:(AV:...
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Reported:	2020-10-19 08:13 UTC by Wolfgang Frisch
Modified:	2021-03-24 14:30 UTC (History)
CC List:	3 users (show)

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Found By:	Security Response Team
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Description Wolfgang Frisch 2020-10-19 08:13:51 UTC

CVE-2020-26682

In libass 0.14.0, the `ass_outline_construct`'s call to `outline_stroke` causes
a signed integer overflow.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-26682
https://github.com/libass/libass/pull/432
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-26682
https://github.com/libass/libass/issues/431

Comment 1 Wolfgang Frisch 2020-10-19 08:21:04 UTC

SUSE:SLE-12:Update  Not affected [1]
SUSE:SLE-15:Update  Affected

[1] The outline rendering code was completely rewritten in libass 0.14.0. The old version in SLE-12 might contain other vulnerabilities but not this one.

Comment 2 Petr Gajdos 2021-03-16 08:23:13 UTC

https://github.com/libass/libass/commit/676f9dc5b52ef406c5527bdadbcb947f11392929

Comment 3 Petr Gajdos 2021-03-16 08:23:45 UTC

Submitted for 15/libass.

I believe all fixed.

Comment 5 Swamp Workflow Management 2021-03-24 14:30:50 UTC

SUSE-SU-2021:0936-1: An update that fixes one vulnerability is now available.

Category: security (important)
Bug References: 1177862
CVE References: CVE-2020-26682
JIRA References: 
Sources used:
SUSE Manager Server 4.0 (src):    libass-0.14.0-3.3.1
SUSE Manager Retail Branch Server 4.0 (src):    libass-0.14.0-3.3.1
SUSE Manager Proxy 4.0 (src):    libass-0.14.0-3.3.1
SUSE Linux Enterprise Server for SAP 15-SP1 (src):    libass-0.14.0-3.3.1
SUSE Linux Enterprise Server for SAP 15 (src):    libass-0.14.0-3.3.1
SUSE Linux Enterprise Server 15-SP1-LTSS (src):    libass-0.14.0-3.3.1
SUSE Linux Enterprise Server 15-SP1-BCL (src):    libass-0.14.0-3.3.1
SUSE Linux Enterprise Server 15-LTSS (src):    libass-0.14.0-3.3.1
SUSE Linux Enterprise Module for Desktop Applications 15-SP3 (src):    libass-0.14.0-3.3.1
SUSE Linux Enterprise Module for Desktop Applications 15-SP2 (src):    libass-0.14.0-3.3.1
SUSE Linux Enterprise High Performance Computing 15-SP1-LTSS (src):    libass-0.14.0-3.3.1
SUSE Linux Enterprise High Performance Computing 15-SP1-ESPOS (src):    libass-0.14.0-3.3.1
SUSE Linux Enterprise High Performance Computing 15-LTSS (src):    libass-0.14.0-3.3.1
SUSE Linux Enterprise High Performance Computing 15-ESPOS (src):    libass-0.14.0-3.3.1
SUSE Enterprise Storage 6 (src):    libass-0.14.0-3.3.1
SUSE CaaS Platform 4.0 (src):    libass-0.14.0-3.3.1

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.