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archlinuxArchLinuxASA-202011-19
HistoryNov 19, 2020 - 12:00 a.m.

[ASA-202011-19] libass: arbitrary code execution

2020-11-1900:00:00
security.archlinux.org
115
libass
vulnerability
arbitrary code execution
upgrade
version 0.15.0-1
signed integer overflow
cve-2020-26682

CVSS2

6.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

8.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

EPSS

0.005

Percentile

75.8%

JSON

Arch Linux Security Advisory ASA-202011-19

Severity: Medium
Date : 2020-11-19
CVE-ID : CVE-2020-26682
Package : libass
Type : arbitrary code execution
Remote : No
Link : https://security.archlinux.org/AVG-1285

Summary

The package libass before version 0.15.0-1 is vulnerable to arbitrary
code execution.

Resolution

Upgrade to 0.15.0-1.

pacman -Syu “libass>=0.15.0-1”

The problem has been fixed upstream in version 0.15.0.

Workaround

None.

Description

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

Impact

A maliciously crafted file might crash the application or execute
arbitrary code.

References

https://github.com/libass/libass/issues/431
https://github.com/libass/libass/pull/432
https://github.com/libass/libass/commit/676f9dc5b52ef406c5527bdadbcb947f11392929
https://security.archlinux.org/CVE-2020-26682

OSVersionArchitecturePackageVersionFilename
ArchLinuxanyanylibass< 0.15.0-1UNKNOWN

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CVSS2

6.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

8.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

EPSS

0.005

Percentile

75.8%

JSON
Related for ASA-202011-19
openvas3suse1mageia1osv1debiancve1cve1nessus3veracode1ubuntucve1nvd1cvelist1gentoo1prion1alpinelinux1