CVE-2006-3251 json
Heap-based buffer overflow in the array_push function in hashcash.c for Hashcash before 1.21 might allow attackers to execute arbitrary cod…
published 2006-06-27 20 y ago modified 2026-06-16 4 mo ago also EUVD-2006-3248
- cvss
- 7.5
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 3.7%
- EPSS 3.7% chance of exploitation in 30 days, percentile 89%
- public exploits
- 0
- none known
Summary
Heap-based buffer overflow in the array_push function in hashcash.c for Hashcash before 1.21 might allow attackers to execute arbitrary code via crafted entries.
Patch / fix
- hashcash Debian 14, Debian 13, Debian 12 1.21
debian advisories DEBIAN-CVE-2006-3251
Exploit prediction
3.65% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Classification
- Weakness
-
- CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
References
-
securityfocus.com
/bid/18659
vdb-entry, patch
-
gentoo.org
/security/en/glsa/glsa-200606-25.xml
vendor-advisory
-
debian.org
/security/2006/dsa-1114
vendor-advisory
-
vupen.com
/english/advisories/2006/2551
vdb-entry, vendor-advisory
-
secunia.com
/advisories/20800
third-party-advisory, vendor-advisory
-
secunia.com
/advisories/21146
third-party-advisory, vendor-advisory
-
secunia.com
/advisories/20846
third-party-advisory, vendor-advisory
-
exchange.xforce.ibmcloud.com
/vulnerabilities/27422
vdb-entry
- hashcash.org /source/CHANGELOG
Sources
- CVE List CVE-2006-3251
- NVD CVE-2006-3251
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