CVE-2011-2165 EXPLOIT
6.8
MEDIUM · CVSS 2.0 · EPSS 5.2% (pctl 92)
Patch early
A public exploit exists.
Description
The STARTTLS implementation in WatchGuard XCS 9.0 and 9.1 does not properly restrict I/O buffering, which allows man-in-the-middle attackers to insert commands into encrypted SMTP sessions by sending a cleartext command that is processed after TLS is in place, related to a "plaintext command injection" attack, a similar issue to CVE-2011-0411.
Scoring
| CVSS | 6.8 (MEDIUM, v2.0) |
|---|---|
| Vector | AV:N/AC:M/Au:N/C:P/I:P/A:P |
| EPSS | 5.16% — more likely to be exploited than 92% of all CVEs |
| Weakness | CWE-264 |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2011-05-23 |
| Last modified | 2026-06-16 |
Affected (1)
| Vendor | Product |
|---|---|
| watchguard | xcs |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | Watchguard XCS 10.0 - Multiple Vulnerabilities | 2015-06-30 |
References
- http://secunia.com/advisories/44753
- http://www.kb.cert.org/vuls/id/555316
- http://www.kb.cert.org/vuls/id/MAPG-8D9M75
- http://www.watchguard.com/support/release-notes/xcs/9/en-US/EN_ReleaseNotes_XCS_9_1_1/EN_ReleaseNotes_WG_XCS_9_1_TLS_Hotfix.pdf
- https://exchange.xforce.ibmcloud.com/vulnerabilities/67729
- http://secunia.com/advisories/44753
- http://www.kb.cert.org/vuls/id/555316
- http://www.kb.cert.org/vuls/id/MAPG-8D9M75
- http://www.watchguard.com/support/release-notes/xcs/9/en-US/EN_ReleaseNotes_XCS_9_1_1/EN_ReleaseNotes_WG_XCS_9_1_TLS_Hotfix.pdf
- https://exchange.xforce.ibmcloud.com/vulnerabilities/67729
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