CVE-2017-6949
An issue was discovered in CHICKEN Scheme through 4.12.0. When using a nonstandard CHICKEN...
CVE-2017-6949 is a high vulnerability (CVSS 8.1) in Call-cc Chicken, published March 16, 2017. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.48%, the 74th percentile. Fixed in chicken 4.12.0-0.2.
- Severity
- 8.1 HighCVSS 3.0, NVD
- Exploit chance
- 1.48%EPSS, 74th percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
4.12.0-0.2chicken +4 more
Description
An issue was discovered in CHICKEN Scheme through 4.12.0. When using a nonstandard CHICKEN-specific extension to allocate an SRFI-4 vector in unmanaged memory, the vector size would be used in unsanitised form as an argument to malloc(). With an unexpected size, the impact may have been a segfault or buffer overflow.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
chickenDebian:12 | before 4.12.0-0.2 | 4.12.0-0.2 |
chickenDebian:13 | before 4.12.0-0.2 | 4.12.0-0.2 |
chickenDebian:14 | before 4.12.0-0.2 | 4.12.0-0.2 |
chickenDebian:7 | before 4.7.0-1+deb7u2, plus listed versions 4.7.0-14.7.0-1+deb7u1 | 4.7.0-1+deb7u2 |
chickenUbuntu:16.04:LTS | All versions, plus listed versions 4.9.0.1-1 | None known |
What each source reports
NVD Score used
An issue was discovered in CHICKEN Scheme through 4.12.0. When using a nonstandard CHICKEN-specific extension to allocate an SRFI-4 vector in unmanaged memory, the vector size would be used in unsanitised form as an argument to malloc(). With an unexpected size, the impact may have been a segfault or buffer overflow.
- Record
CVE-2017-6949- CVSS 3.0
- 8.1 High
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 6.8 Medium
AV:N/AC:M/Au:N/C:P/I:P/A:P - Weakness
- CWE-119
- Updated
- 2026-11-02
CVE ListNo score
An issue was discovered in CHICKEN Scheme through 4.12.0. When using a nonstandard CHICKEN-specific extension to allocate an SRFI-4 vector in unmanaged memory, the vector size would be used in unsanitised form as an argument to malloc(). With an unexpected size, the impact may have been a segfault or buffer overflow.
- Record
CVE-2017-6949- Updated
- 2026-11-02
EUVDEUVD-2017-15989No score
An issue was discovered in CHICKEN Scheme through 4.12.0. When using a nonstandard CHICKEN-specific extension to allocate an SRFI-4 vector in unmanaged memory, the vector size would be used in unsanitised form as an argument to malloc(). With an unexpected size, the impact may have been a segfault or buffer overflow.
- Record
EUVD-2017-15989- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-mg7g-v2j9-85r8
An issue was discovered in CHICKEN Scheme through 4.12.0. When using a nonstandard CHICKEN...
An issue was discovered in CHICKEN Scheme through 4.12.0. When using a nonstandard CHICKEN-specific extension to allocate an SRFI-4 vector in unmanaged memory, the vector size would be used in unsanitised form as an argument to malloc(). With an unexpected size, the impact may have been a segfault or buffer overflow.
- Record
GHSA-mg7g-v2j9-85r8- CVSS 3.0
- 8.1 High
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-119
- Updated
- 2026-11-02
OSV
An issue was discovered in CHICKEN Scheme through 4.12.0. When using a nonstandard CHICKEN-specific extension to allocate an SRFI-4 vector in unmanaged memory, the vector size would be used in unsanitised form as an argument to malloc(). With an unexpected size, the impact may have been a segfault or buffer overflow.
- Record
CVE-2017-6949- CVSS 3.0
- 8.1 High
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2017-6949
An issue was discovered in CHICKEN Scheme through 4.12.0. When using a nonstandard CHICKEN-specific extension to allocate an SRFI-4 vector in unmanaged memory, the vector size would be used in unsanitised form as an argument to malloc(). With an unexpected size, the impact may have been a segfault or buffer overflow.
- Record
DEBIAN-CVE-2017-6949- CVSS 3.0
- 8.1 High
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2017-6949
An issue was discovered in CHICKEN Scheme through 4.12.0. When using a nonstandard CHICKEN-specific extension to allocate an SRFI-4 vector in unmanaged memory, the vector size would be used in unsanitised form as an argument to malloc(). With an unexpected size, the impact may have been a segfault or buffer overflow.
- Record
UBUNTU-CVE-2017-6949- CVSS 3.0
- 8.1 High
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.