5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
1.9 Low
CVSS2
Access Vector
LOCAL
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:M/Au:N/C:P/I:N/A:N
0.0004 Low
EPSS
Percentile
14.1%
When running processes using “chroot” isolation, the process being run can examine the environment variables of its immediate parent and grandparent processes (CVE-2021-3602). This isolation type is often used when running buildah
in unprivileged containers, and it is often used to do so in CI/CD environments. If sensitive information is exposed to the original buildah
process through its environment, that information will unintentionally be shared with child processes which it starts as part of handling RUN instructions or during buildah run
. The commands that buildah
is instructed to run can read that information if they choose to.
Users should upgrade packages, or images which contain packages, to include version 1.21.3 or later.
As a workaround, invoking buildah
in a container under env -i
to have it started with a reinitialized environment should prevent the leakage.
If you have any questions or comments about this advisory:
bugzilla.redhat.com/show_bug.cgi?id=1969264
github.com/containers/buildah
github.com/containers/buildah/commit/a468ce0ffd347035d53ee0e26c205ef604097fb0
github.com/containers/buildah/security/advisories/GHSA-7638-r9r3-rmjj
nvd.nist.gov/vuln/detail/CVE-2021-3602
pkg.go.dev/vuln/GO-2022-0345
ubuntu.com/security/CVE-2021-3602
5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
1.9 Low
CVSS2
Access Vector
LOCAL
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:M/Au:N/C:P/I:N/A:N
0.0004 Low
EPSS
Percentile
14.1%