CVE-2017-11555
CVE-2017-11555 is a high-severity vulnerability in Libsass with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- CVSS v2: 5.0
- EPSS exploit prediction: 1% (64th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-20
- Affected product: Libsass
- Published:
- Last modified:
Description
There is an illegal address access in the Eval::operator function in eval.cpp in LibSass 3.4.5. A crafted input will lead to a remote denial of service.
Frequently asked questions
- What is CVE-2017-11555?
- There is an illegal address access in the Eval::operator function in eval.cpp in LibSass 3.4.5. A crafted input will lead to a remote denial of service.
- How severe is CVE-2017-11555?
- CVE-2017-11555 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2017-11555 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2017-11555?
- CVE-2017-11555 affects Libsass. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2017-11555?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2017-11555 published?
- CVE-2017-11555 was published on 2017-07-23 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:libsass:libsass:3.4.5:*:*:*:*:*:*:*
More vulnerabilities in Libsass
- CVE-2017-12964 — High (CVSS 7.5): There is a stack consumption issue in LibSass 3.4.5 that is triggered in the function Sass::Eval::operator() in…
- CVE-2017-12963 — High (CVSS 7.5): There is an illegal address access in Sass::Eval::operator() in eval.cpp of LibSass 3.4.5, leading to a remote denial…
- CVE-2017-12962 — High (CVSS 7.5): There are memory leaks in LibSass 3.4.5 triggered by deeply nested code, such as code with a long sequence of open…
- CVE-2017-11556 — High (CVSS 7.5): There is a stack consumption vulnerability in the Parser::advanceToNextToken function in parser.cpp in LibSass 3.4.5. A…
- CVE-2017-11554 — High (CVSS 7.5): There is a stack consumption vulnerability in the lex function in parser.hpp (as used in sassc) in LibSass 3.4.5. A…
- CVE-2017-11342 — High (CVSS 7.5): There is an illegal address access in ast.cpp of LibSass 3.4.5. A crafted input will lead to a remote denial of service…
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