Vulnerability Details : CVE-2023-40184
xrdp is an open source remote desktop protocol (RDP) server. In versions prior to 0.9.23 improper handling of session establishment errors allows bypassing OS-level session restrictions. The `auth_start_session` function can return non-zero (1) value on, e.g., PAM error which may result in in session restrictions such as max concurrent sessions per user by PAM (ex ./etc/security/limits.conf) to be bypassed. Users (administrators) don't use restrictions by PAM are not affected. This issue has been addressed in release version 0.9.23. Users are advised to upgrade. There are no known workarounds for this issue.
Products affected by CVE-2023-40184
- cpe:2.3:a:neutrinolabs:xrdp:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2023-40184
0.14%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 50 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-40184
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.5
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
2.8
|
3.6
|
NIST | |
|
2.6
|
LOW | CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L |
1.2
|
1.4
|
GitHub, Inc. |
CWE ids for CVE-2023-40184
-
The product does not handle or incorrectly handles an exceptional condition.Assigned by: security-advisories@github.com (Primary)
References for CVE-2023-40184
-
https://github.com/neutrinolabs/xrdp/blame/9bbb2ec68f390504c32f2062847aa3d821a0089a/sesman/sesexec/session.c#L571C5-L571C19
Blaming xrdp/sesman/sesexec/session.c at 9bbb2ec68f390504c32f2062847aa3d821a0089a · neutrinolabs/xrdp · GitHubProduct
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https://github.com/neutrinolabs/xrdp/commit/a111a0fdfe2421ef600e40708b5f0168594cfb23
Merge pull request from GHSA-f489-557v-47jq · neutrinolabs/xrdp@a111a0f · GitHubPatch
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https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-f489-557v-47jq
Improper handling of session establishment errors allows bypassing OS-level session restrictions · Advisory · neutrinolabs/xrdp · GitHubVendor Advisory
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https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/URO3FKTFBPNKFARAQBEJLI4MH6YS35P5/
[SECURITY] Fedora 39 Update: xrdp-0.9.23-1.fc39 - package-announce - Fedora Mailing-Lists
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https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SOT237TIHTHPX5YNIWLVNINOEYC7WMG2/
[SECURITY] Fedora 37 Update: xrdp-0.9.23-1.fc37 - package-announce - Fedora Mailing-Lists
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U5IXMQODV3OIJ7DRQBUQV7PUKNT7SH36/
[SECURITY] Fedora 38 Update: xrdp-0.9.23-1.fc38 - package-announce - Fedora Mailing-Lists
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