Vulnerability Details : CVE-2020-26682
In libass 0.14.0, the `ass_outline_construct`'s call to `outline_stroke` causes a signed integer overflow.
Vulnerability category: Overflow
Products affected by CVE-2020-26682
- cpe:2.3:a:libass_project:libass:0.14.0:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-26682
0.29%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 68 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-26682
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
6.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:P/A:P |
8.6
|
6.4
|
NIST | |
8.8
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
2.8
|
5.9
|
NIST |
CWE ids for CVE-2020-26682
-
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.Assigned by: nvd@nist.gov (Primary)
References for CVE-2020-26682
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http://www.openwall.com/lists/oss-security/2020/11/19/7
oss-security - Re: libass ass_outline.c signed integer overflowExploit;Issue Tracking;Mailing List;Third Party Advisory
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https://security.gentoo.org/glsa/202012-12
libass: User-assisted execution of arbitrary code (GLSA 202012-12) — Gentoo securityThird Party Advisory
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https://github.com/libass/libass/pull/432
Fix overflows in outline processing by MrSmile · Pull Request #432 · libass/libass · GitHubIssue Tracking;Third Party Advisory
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https://github.com/libass/libass/issues/431
Bug in ass_outline.c:1354: _Bool outline_stroke(ASS_Outline *, ASS_Outline *, const ASS_Outline *, int, int, int): Assertion `rad >= eps' failed. · Issue #431 · libass/libass · GitHubExploit;Issue Tracking;Third Party Advisory
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