Heap-based buffer overflow in the ALGnew function in block_templace.c in Python…
Priority MEDIUM 54CWE-119Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- 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 3.0 · NVD. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-119 and the CVSS impact.
Summary
Heap-based buffer overflow in the ALGnew function in block_templace.c in Python Cryptography Toolkit (aka pycrypto) allows remote attackers to execute arbitrary code as demonstrated by a crafted iv parameter to cryptmsg.py.
Why it matters now
EPSS 0.09578 95th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
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 |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | pycrypto (PyPI) | up to 2.6.1 | — | No fix listed | GHSA-cq27-v7xp-c356 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- pycrypto (PyPI) Vendor— Affected up to 2.6.1 Fixed in — No fix listed GHSA-cq27-v7xp-c356
CPE configurations NVD · 3
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:dlitz:pycrypto:*:*:*:*:*:*:*:* | up to 2.6.1 | Vulnerable | Dlitz |
| cpe:2.3:o:fedoraproject:fedora:24:*:*:*:*:*:*:* | 24 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:25:*:*:*:*:*:*:* | 25 | Vulnerable | Fedoraproject |
- cpe:2.3:a:dlitz:pycrypto:*:*:*:*:*:*:*:* Versions up to 2.6.1 Vulnerable ·Dlitz
- cpe:2.3:o:fedoraproject:fedora:24:*:*:*:*:*:*:* Versions 24 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:25:*:*:*:*:*:*:* Versions 25 Vulnerable ·Fedoraproject
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Ceph Storage 1.3 | Affected | No fix planned: Will not fix |
| Red Hat Ceph Storage 2 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux OpenStack Platform 6 (Juno) | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux OpenStack Platform 7 (Kilo) | Affected | No fix planned: Will not fix |
| Red Hat OpenShift Enterprise 3 | Affected | No fix planned: Will not fix |
| Red Hat OpenStack Platform 10 (Newton) | Affected | No fix planned: Will not fix |
| Red Hat OpenStack Platform 11 (Ocata) | Affected | No fix planned: Will not fix |
| Red Hat OpenStack Platform 8 (Liberty) | Affected | No fix planned: Will not fix |
| Red Hat OpenStack Platform 9 (Mitaka) | Affected | No fix planned: Will not fix |
| Red Hat Storage 3 | Affected | No fix planned: Will not fix |
| Red Hat Storage Console 2 | Affected | No fix planned: Will not fix |
| Red Hat Virtualization 4 | Affected | No fix planned: Will not fix |
Not affected: 5 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Virtualization 3
- Red Hat OpenStack Platform 12 (Pike)
- Red Hat Quickstart Cloud Installer 1
Timeline
- 2026-10-02 Threatist record created from CVE-2013-7459
- 2026-10-03 Alias added: GHSA-cq27-v7xp-c356
References
Patch 2
Advisory 7
Other 4
- https://github.com/dlitz/pycrypto
- https://github.com/pypa/advisory-database/tree/main/vulns/pycrypto/PYSEC-2017-94.yaml
- https://lists.fedoraproject.org/archives/list/[email protected]/message/C6BWNADPLKDBBQBUT3P75W7HAJCE7M3B
- https://lists.fedoraproject.org/archives/list/[email protected]/message/RJ37R2YLX56YZABFNAOWV4VTHTGYREAE
Sources
- CVE-2013-7459 · CVE Program
- CVE-2013-7459 · NVD
- FIRST EPSS
- GHSA-cq27-v7xp-c356 · GitHub Advisory Database · CC BY 4.0
- CVE-2013-7459 · Red Hat security data · CC BY 4.0
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