Use-after-free vulnerability in Dropbear SSH Server 0.52 through 2012.54, when command restriction and public key authentication are enabled, allows remote authenticated users to execute arbitrary code and bypass command restrictions via multiple crafted command requests, related to "channels concurrency."
Published Jun 5, 2012
7.1
HIGHCVSS 2.0
EPSS 6.49%
Description
Use-after-free vulnerability in Dropbear SSH Server 0.52 through 2012.54, when command restriction and public key authentication are enabled, allows remote authenticated users to execute arbitrary code and bypass command restrictions via multiple crafted command requests, related to "channels concurrency."
Affected products
No data.
Configuration 1
- ≥ 0.52 · ≤ 2012.54
Configuration 2
- 6.0
- 7.0
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:H/Au:S/C:C/I:C/A:C
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 1, 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 (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 6.49% (0.06489) | 93.55th | v5 (v2026.06.15) |
| Jun 15, 2026 | 6.49% (0.06489) | 92.86th | v5 (v2026.06.15) |
| Mar 30, 2025 | 1.80% (0.01803) | 81.17th | v4 (v2025.03.14) |
| Mar 29, 2025 | 5.92% (0.05921) | 83.94th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.80% (0.01803) | 81.58th | v4 (v2025.03.14) |
| Jan 24, 2025 | 4.10% (0.04104) | 92.11th | v3 (v2023.03.01) |
| Dec 17, 2024 | 2.98% (0.02977) | 90.65th | v3 (v2023.03.01) |
| Dec 12, 2024 | 1.08% (0.01080) | 84.94th | v3 (v2023.03.01) |
| Apr 4, 2024 | 1.03% (0.01032) | 83.56th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.03% (0.01032) | 81.56th | v3 (v2023.03.01) |
| Mar 6, 2023 | 8.34% (0.08336) | 93.56th | v2 (v2022.01.01) |
| Apr 1, 2022 | 8.34% (0.08336) | 92.97th | v2 (v2022.01.01) |
| Feb 4, 2022 | 8.34% (0.08336) | 82.36th | v2 (v2022.01.01) |
References (9)
- http://matt.ucc.asn.au/dropbear/CHANGES x_refsource_CONFIRMVendor Advisory
- http://secunia.com/advisories/48147 third-party-advisoryx_refsource_SECUNIAThird Party Advisory
- http://secunia.com/advisories/48929 third-party-advisoryx_refsource_SECUNIAThird Party Advisory
- http://www.debian.org/security/2012/dsa-2456 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- http://www.osvdb.org/79590 vdb-entryx_refsource_OSVDBBroken Link
- http://www.securityfocus.com/bid/52159 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://exchange.xforce.ibmcloud.com/vulnerabilities/73444 vdb-entryx_refsource_XFThird Party AdvisoryVDB Entry
- https://secure.ucc.asn.au/hg/dropbear/rev/818108bf7749 x_refsource_CONFIRMVendor Advisory
- https://www.mantor.org/~northox/misc/CVE-2012-0920.html x_refsource_MISCThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| http://matt.ucc.asn.au/dropbear/CHANGES | x_refsource_CONFIRMVendor Advisory | |
| http://secunia.com/advisories/48147 | third-party-advisoryx_refsource_SECUNIAThird Party Advisory | |
| http://secunia.com/advisories/48929 | third-party-advisoryx_refsource_SECUNIAThird Party Advisory | |
| http://www.debian.org/security/2012/dsa-2456 | vendor-advisoryx_refsource_DEBIANThird Party Advisory | |
| http://www.osvdb.org/79590 | vdb-entryx_refsource_OSVDBBroken Link | |
| http://www.securityfocus.com/bid/52159 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/73444 | vdb-entryx_refsource_XFThird Party AdvisoryVDB Entry | |
| https://secure.ucc.asn.au/hg/dropbear/rev/818108bf7749 | x_refsource_CONFIRMVendor Advisory | |
| https://www.mantor.org/~northox/misc/CVE-2012-0920.html | x_refsource_MISCThird Party Advisory |
Change history (0)
No recorded changes yet.