CVE-2017-11554
There is a stack consumption vulnerability in the lex function in parser.hpp (as used in sassc)...
There is a stack consumption vulnerability in the lex function in parser.hpp (as used in sassc) in LibSass 3.4.5. A crafted input will lead to a remote denial of service.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
There is a stack consumption vulnerability in the lex function in parser.hpp (as used in sassc) in LibSass 3.4.5. A crafted input will lead to a remote denial of service.
- Record
CVE-2017-11554- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-674
- Updated
- 2026-11-02
CVE List No score
There is a stack consumption vulnerability in the lex function in parser.hpp (as used in sassc) in LibSass 3.4.5. A crafted input will lead to a remote denial of service.
- Record
CVE-2017-11554- Updated
- 2026-11-02
EUVDEUVD-2017-3169 No score
There is a stack consumption vulnerability in the lex function in parser.hpp (as used in sassc) in LibSass 3.4.5. A crafted input will lead to a remote denial of service.
- Record
EUVD-2017-3169- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-qqjx-qv79-g2q3
There is a stack consumption vulnerability in the lex function in parser.hpp (as used in sassc)...
There is a stack consumption vulnerability in the lex function in parser.hpp (as used in sassc) in LibSass 3.4.5. A crafted input will lead to a remote denial of service.
- Record
GHSA-qqjx-qv79-g2q3- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-674
- Updated
- 2026-11-02
OSV
There is a stack consumption vulnerability in the lex function in parser.hpp (as used in sassc) in LibSass 3.4.5. A crafted input will lead to a remote denial of service.
- Record
CVE-2017-11554- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2017-11554
There is a stack consumption vulnerability in the lex function in parser.hpp (as used in sassc) in LibSass 3.4.5. A crafted input will lead to a remote denial of service.
- Record
DEBIAN-CVE-2017-11554- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2017-11554
There is a stack consumption vulnerability in the lex function in parser.hpp (as used in sassc) in LibSass 3.4.5. A crafted input will lead to a remote denial of service.
- Record
UBUNTU-CVE-2017-11554- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
libsassDebian:12 |
before 3.5.4-1 | 3.5.4-1 |
libsassDebian:13 |
before 3.5.4-1 | 3.5.4-1 |
libsassDebian:14 |
before 3.5.4-1 | 3.5.4-1 |
libsassUbuntu:16.04:LTS |
All versions, plus listed versions 3.2.5-13.2.5-23.3.2-13.3.4-1 |
None known |
libsassUbuntu:Pro:18.04:LTS |
All versions, plus listed versions 3.4.3-13.4.6-13.4.8-13.4.8-1ubuntu0.1~esm1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2017-11554 is a high vulnerability (CVSS 7.5) in Libsass, published July 23, 2017. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.88%, the 79th percentile. Fixed in libsass 3.5.4-1.