MEDIUM
libsass: Heap-based buffer over-read in the handle_error function resulting in a denial of service
Published Dec 4, 2018
6.5
MEDIUMCVSS 3.0
EPSS 2.16%
Description
In LibSass prior to 3.5.5, the function handle_error in sass_context.cpp allows attackers to cause a denial-of-service resulting from a heap-based buffer over-read via a crafted sass file.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
6.5 MEDIUM NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
1 other source (Red Hat) ▾
3.3 LOW Red Hat
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact Low
4.3 MEDIUM NVD
AV:N/AC:M/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
2.16% 0.02156
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
EPSS probability 0.02156
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 2.16% (0.02156) | 81.53th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.16% (0.02156) | 79.73th | v5 (v2026.06.15) |
| Jul 25, 2025 | 0.25% (0.00246) | 47.81th | v4 (v2025.03.14) |
| Jul 20, 2024 | 0.33% (0.00326) | 71.09th | v3 (v2023.03.01) |
| Apr 26, 2024 | 0.33% (0.00326) | 70.46th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.35% (0.00353) | 71.16th | v3 (v2023.03.01) |
| Nov 28, 2023 | 0.35% (0.00353) | 68.86th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.30% (0.00303) | 64.89th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.02% (0.01018) | 19.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.25% (0.01247) | 30.57th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.25% (0.01247) | 0.00th | v1 |
Weaknesses (2)
References (9)
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00047.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00051.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00027.html vendor-advisoryx_refsource_SUSE
- https://access.redhat.com/security/cve/CVE-2018-19839 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1671386 Issue Tracking
- https://github.com/sass/libsass/issues/2657 x_refsource_MISCExploitThird Party Advisory
- https://github.com/sass/libsass/pull/2767 x_refsource_MISCPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-19839
- https://www.cve.org/CVERecord?id=CVE-2018-19839
| Link | Providers | Tags |
|---|---|---|
| http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00047.html | vendor-advisoryx_refsource_SUSE | |
| http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00051.html | vendor-advisoryx_refsource_SUSE | |
| http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00027.html | vendor-advisoryx_refsource_SUSE | |
| https://access.redhat.com/security/cve/CVE-2018-19839 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1671386 | Issue Tracking | |
| https://github.com/sass/libsass/issues/2657 | x_refsource_MISCExploitThird Party Advisory | |
| https://github.com/sass/libsass/pull/2767 | x_refsource_MISCPatchThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2018-19839 | ||
| https://www.cve.org/CVERecord?id=CVE-2018-19839 |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Dec 4, 2018
Updated Aug 5, 2024
Reserved Dec 3, 2018
Link CVE-2018-19839
CISA Vulnrichment
Updated n/a