Vulnerability Details : CVE-2018-19837
In LibSass prior to 3.5.5, Sass::Eval::operator()(Sass::Binary_Expression*) inside eval.cpp allows attackers to cause a denial-of-service resulting from stack consumption via a crafted sass file, because of certain incorrect parsing of '%' as a modulo operator in parser.cpp.
Vulnerability category: Denial of service
Exploit prediction scoring system (EPSS) score for CVE-2018-19837
Probability of exploitation activity in the next 30 days: 0.31%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 67 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2018-19837
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
---|---|---|---|---|---|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:N/I:N/A:P |
8.6
|
2.9
|
NIST |
6.5
|
MEDIUM | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
2.8
|
3.6
|
NIST |
CWE ids for CVE-2018-19837
-
The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.Assigned by: nvd@nist.gov (Primary)
References for CVE-2018-19837
-
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00047.html
[security-announce] openSUSE-SU-2019:1791-1: moderate: Security update f
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https://github.com/sass/libsass/commit/210fdff7a65370c2ae24e022a2b35da8c423cc5f
Remove legacy workaround for parsing modulo operator · sass/libsass@210fdff · GitHubExploit;Third Party Advisory
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https://github.com/sass/libsass/issues/2659
AddressSanitizer: stack-overflow in Eval::operator() (eval.cpp:563) · Issue #2659 · sass/libsass · GitHubPatch;Vendor Advisory
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http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00051.html
[security-announce] openSUSE-SU-2019:1800-1: moderate: Security update f
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http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00027.html
[security-announce] openSUSE-SU-2019:1883-1: moderate: Security update f
Products affected by CVE-2018-19837
- cpe:2.3:a:sass-lang:libsass:*:*:*:*:*:*:*:*