Out-of-bounds write in Flexera Software LLC GnuTLS libtasn1
Priority MEDIUM 47CWE-787Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Will not fix Red Hat: no fix planned
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-787 and the CVSS impact.
Summary
Two errors in the "asn1_find_node()" function (lib/parser_aux.c) within GnuTLS libtasn1 version 4.10 can be exploited to cause a stacked-based buffer overflow by tricking a user into processing a specially crafted assignments file via the e.g. asn1Coding utility.
Why it matters now
EPSS 0.05585 92nd percentileScored 2026-11-07
Fix Will not fix Red Hat: no fix planned
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Flexera Software LLC | GnuTLS libtasn1 | 4.10. Other versions may also be affected. | — | No fix listed | CNA |
- GnuTLS libtasn1 VendorFlexera Software LLC Affected 4.10. Other versions may also be affected. Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Virtualization 3 | Affected | No fix planned: Will not fix |
| Red Hat Satellite 6 | Affected | No fix planned: Will not fix |
Timeline
- 2026-10-02 Threatist record created from CVE-2017-6891
- 2026-10-03 Alias added: GHSA-ch46-3x6h-7qrw
References
Other 4
- https://secuniaresearch.flexerasoftware.com/advisories/76125/
- http://git.savannah.gnu.org/gitweb/?p=libtasn1.git%3Ba=commit%3Bh=5520704d075802df25ce4ffccc010ba1641bd484
- [bookkeeper-issues] 20210628 [GitHub] [bookkeeper] padma81 opened a new issue #2746: Security Vulnerabilities in CentOS 7 image, Upgrade image to CentOS 8
- [bookkeeper-issues] 20210629 [GitHub] [bookkeeper] padma81 opened a new issue #2746: Security Vulnerabilities in CentOS 7 image, Upgrade image to CentOS 8
More Flexera Software LLC vulnerabilities
- TI-2011-03652 Multiple directory traversal vulnerabilities in lmgrd in Flexera FlexNet Publisher 11.10… CVSS 2.0HIGH 10.0
- TI-2015-06818 Multiple buffer overflows in (1) lmgrd and (2) Vendor Daemon in Flexera FlexNet Publisher… CVSS 3.0CRITICAL 9.8
- TI-2019-15367 FlexNet Publisher 11.12.1 - Cross-Site Request Forgery (Add Local Admin) CVSS 4.0MEDIUM 5.1
- TI-2011-03651 Heap-based buffer overflow in lmadmin in Flexera FlexNet Publisher 11.10 (aka FlexNet… CVSS 2.0HIGH 10.0
- TI-2018-14211 Resource allocation without limits in Flexera Software LLC FlexNet Publisher CVSS 3.1CRITICAL 9.8
- TI-2017-04617 An error when handling certain external commands and services related to the FlexNet… CVSS 3.0CRITICAL 9.8
Sources
- CVE-2017-6891 · CVE Program
- CVE-2017-6891 · NVD
- FIRST EPSS
- GHSA-ch46-3x6h-7qrw · GitHub Advisory Database · CC BY 4.0
- CVE-2017-6891 · Red Hat security data · CC BY 4.0
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