CVE-2021-33900: StartTLS and SASL confidentiality protection bypass
First published: Mon Jul 26 2021(Updated: )
While investigating DIRSTUDIO-1219 it was noticed that configured StartTLS encryption was not applied when any SASL authentication mechanism (DIGEST-MD5, GSSAPI) was used. While investigating DIRSTUDIO-1220 it was noticed that any configured SASL confidentiality layer was not applied. This issue affects Apache Directory Studio version 2.0.0.v20210213-M16 and prior versions.
Credit: security@apache.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Apache Directory Studio | <=1.5.3 | |
| Apache Directory Studio | =2.0.0-milestone1 | |
| Apache Directory Studio | =2.0.0-milestone10 | |
| Apache Directory Studio | =2.0.0-milestone11 | |
| Apache Directory Studio | =2.0.0-milestone12 | |
| Apache Directory Studio | =2.0.0-milestone13 | |
| Apache Directory Studio | =2.0.0-milestone14 | |
| Apache Directory Studio | =2.0.0-milestone15 | |
| Apache Directory Studio | =2.0.0-milestone16 | |
| Apache Directory Studio | =2.0.0-milestone2 | |
| Apache Directory Studio | =2.0.0-milestone3 | |
| Apache Directory Studio | =2.0.0-milestone4 | |
| Apache Directory Studio | =2.0.0-milestone5 | |
| Apache Directory Studio | =2.0.0-milestone6 | |
| Apache Directory Studio | =2.0.0-milestone7 | |
| Apache Directory Studio | =2.0.0-milestone8 | |
| Apache Directory Studio | =2.0.0-milestone9 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2021-33900?
The severity of CVE-2021-33900 is classified as Medium due to the lack of StartTLS encryption during SASL authentication.
How do I fix CVE-2021-33900?
To fix CVE-2021-33900, you should upgrade to a non-vulnerable version of Apache Directory Studio that correctly implements StartTLS for SASL mechanisms.
Which versions of Apache Directory Studio are affected by CVE-2021-33900?
CVE-2021-33900 affects Apache Directory Studio versions up to 1.5.3 and all milestone releases of version 2.0.0.
What happens if I am using an affected version of Apache Directory Studio with CVE-2021-33900?
Using an affected version may expose sensitive data over the network, as it does not enforce encryption during SASL authentication.
Is there a workaround for CVE-2021-33900?
Currently, the recommended action is to upgrade to the latest version of Apache Directory Studio, as there is no documented workaround for this vulnerability.
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- canonical/apache directory studio
- version/apache directory studio/1.5.3
- version/apache directory studio/2.0.0-milestone1
- version/apache directory studio/2.0.0-milestone10
- version/apache directory studio/2.0.0-milestone11
- version/apache directory studio/2.0.0-milestone12
- version/apache directory studio/2.0.0-milestone13
- version/apache directory studio/2.0.0-milestone14
- version/apache directory studio/2.0.0-milestone15
- version/apache directory studio/2.0.0-milestone16
- version/apache directory studio/2.0.0-milestone2
- version/apache directory studio/2.0.0-milestone3
- version/apache directory studio/2.0.0-milestone4
- version/apache directory studio/2.0.0-milestone5
- version/apache directory studio/2.0.0-milestone6
- version/apache directory studio/2.0.0-milestone7
- version/apache directory studio/2.0.0-milestone8
- version/apache directory studio/2.0.0-milestone9