Back
CVE-2002-0639
Integer overflow in sshd in OpenSSH 2.9.9 through 3.3 allows remote attackers to execute arbitrary code during challenge response…
Critical9.8EPSS 18.3%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
Integer overflow in sshd in OpenSSH 2.9.9 through 3.3 allows remote attackers to execute arbitrary code during challenge response authentication (ChallengeResponseAuthentication) when OpenSSH is using SKEY or BSD_AUTH authentication.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 18.3% · top 2.8% of all CVEs (2 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Weakness
Affected products
n/a
- affected n/a
References (16)
- DSA-134 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- openssh-challenge-response-bo(9169) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- 20020626 [OpenPKG-SA-2002.005] OpenPKG Security Advisory (openssh) (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 20020626 OpenSSH Security Advisory (adv.iss) (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 6245 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
- CA-2002-18 (opens in a new tab)third-party-advisoryx_refsource_CERTx_transferred
- 20020627 How to reproduce OpenSSH Overflow. (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 5093 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- ESA-20020702-016 (opens in a new tab)vendor-advisoryx_refsource_ENGARDEx_transferred
- VU#369347 (opens in a new tab)third-party-advisoryx_refsource_CERT-VNx_transferred
- CLA-2002:502 (opens in a new tab)vendor-advisoryx_refsource_CONECTIVAx_transferred
- HPSBUX0206-195 (opens in a new tab)vendor-advisoryx_refsource_HPx_transferred
- MDKSA-2002:040 (opens in a new tab)vendor-advisoryx_refsource_MANDRAKEx_transferred
- 20020626 Revised OpenSSH Security Advisory (adv.iss) (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 20020626 OpenSSH Remote Challenge Vulnerability (opens in a new tab)third-party-advisoryx_refsource_ISSx_transferred
- https://twitter.com/RooneyMcNibNug/status/1152332585349111810 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Record last updated .