Skip to content

advisory: Private key leak via inherited file descriptor #298

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Nov 17, 2025
Merged

advisory: Private key leak via inherited file descriptor #298

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
1 change: 1 addition & 0 deletions advisories/hackage/crypton-x509-store/HSEC-2025-0006.md
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
../../published/2025/HSEC-2025-0006.md
1 change: 1 addition & 0 deletions advisories/hackage/x509-store/HSEC-2025-0006.md
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
../../published/2025/HSEC-2025-0006.md
38 changes: 38 additions & 0 deletions advisories/published/2025/HSEC-2025-0006.md
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,38 @@
```toml
[advisory]
id = "HSEC-2025-0006"
keywords = ["crypto"]
cwe = [403]

[[references]]
type = "FIX"
url = "https://github.com/kazu-yamamoto/crypton-certificate/commit/e353d450c381c9d6b903c4257927e0c89c97acb1"

[[affected]]
package = "x509-store"
cvss = "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"
[[affected.versions]]
introduced = "0.1"

[[affected]]
package = "crypton-x509-store"
cvss = "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"
[[affected.versions]]
introduced = "1.6.9"
fixed = "1.6.12"
```

# Private key leak via inherited file descriptor

The X.509 key reading function `readKeyFile` opened a file
descriptor to the private key without setting the *close-on-exec*
flag. If a child process is `exec`ed at the same time, it would
inherit that file descriptor and could read the private key
material.

Impact is limited to child processes that run untrusted code, but
that do not close inherited file descriptors. (For example, the
`su(1)` command.)

This leak was fixed by setting the *close-on-exec* flag on
unix-based systems.
Loading