The try_parse_v4_netmask function in hostmask.c in IRCD-Hybrid before 8.0.6 does not properly validate masks, which allows remote attackers to cause a denial of service (crash) via a mask that causes a negative number to be parsed
Published Feb 13, 2013
5.0
MEDIUMCVSS 2.0
EPSS 9.96%
Description
The try_parse_v4_netmask function in hostmask.c in IRCD-Hybrid before 8.0.6 does not properly validate masks, which allows remote attackers to cause a denial of service (crash) via a mask that causes a negative number to be parsed.
Affected products
No data.
- ≤ 8.0.5
- 7.2.0
- 7.2.1
- 7.2.2
- 7.2.3
- 7.3.0
- 7.3.0
- 7.3.1
- 8.0.0
- 8.0.0
- 8.0.0
- 8.0.0
- 8.0.0
- 8.0.1
- 8.0.2
- 8.0.3
- 8.0.4
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (17 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 9.96% (0.09962) | 95.46th | v5 (v2026.06.15) |
| Jun 15, 2026 | 9.96% (0.09962) | 94.98th | v5 (v2026.06.15) |
| Mar 30, 2025 | 39.23% (0.39225) | 96.99th | v4 (v2025.03.14) |
| Mar 29, 2025 | 42.58% (0.42577) | 96.21th | v4 (v2025.03.14) |
| Mar 17, 2025 | 39.23% (0.39225) | 96.95th | v4 (v2025.03.14) |
| Dec 17, 2024 | 44.51% (0.44512) | 97.45th | v3 (v2023.03.01) |
| Dec 12, 2024 | 15.30% (0.15298) | 96.07th | v3 (v2023.03.01) |
| May 9, 2024 | 15.88% (0.15875) | 95.92th | v3 (v2023.03.01) |
| Mar 9, 2024 | 18.46% (0.18458) | 96.06th | v3 (v2023.03.01) |
| Aug 31, 2023 | 19.57% (0.19574) | 95.65th | v3 (v2023.03.01) |
| Mar 7, 2023 | 21.60% (0.21604) | 95.65th | v3 (v2023.03.01) |
| Mar 6, 2023 | 12.96% (0.12955) | 95.64th | v2 (v2022.01.01) |
| Jan 26, 2023 | 12.96% (0.12955) | 95.45th | v2 (v2022.01.01) |
| Oct 24, 2022 | 13.61% (0.13605) | 95.62th | v2 (v2022.01.01) |
| Jul 17, 2022 | 14.49% (0.14493) | 95.72th | v2 (v2022.01.01) |
| Apr 1, 2022 | 15.65% (0.15648) | 95.72th | v2 (v2022.01.01) |
| Feb 4, 2022 | 15.65% (0.15648) | 92.63th | v2 (v2022.01.01) |
References (12)
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=699267 x_refsource_CONFIRM
- http://osvdb.org/89623 vdb-entryx_refsource_OSVDB
- http://secunia.com/advisories/51948 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://secunia.com/advisories/52106 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://svn.ircd-hybrid.org:8000/viewcvs.cgi/ircd-hybrid/trunk/src/hostmask.c?r1=1786&r2=1785&pathrev=1786 x_refsource_CONFIRM
- http://www.debian.org/security/2013/dsa-2618 vendor-advisoryx_refsource_DEBIAN
- http://www.exploit-db.com/exploits/24951 exploitx_refsource_EXPLOIT-DB
- http://www.mandriva.com/security/advisories?name=MDVSA-2013:093 vendor-advisoryx_refsource_MANDRIVA
- http://www.openwall.com/lists/oss-security/2013/01/29/8 mailing-listx_refsource_MLIST
- http://www.securityfocus.com/bid/57610 vdb-entryx_refsource_BID
- https://exchange.xforce.ibmcloud.com/vulnerabilities/81695 vdb-entryx_refsource_XF
- https://wiki.mageia.org/en/Support/Advisories/MGASA-2013-0055 x_refsource_CONFIRM
Change history (0)
No recorded changes yet.