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CVE-2020-10595
CVE information
Published
Last Modified
CVSSv2.0 Severity
CVSSv3.1 Severity
Impact Analysis
Description
pam-krb5 before 4.9 has a buffer overflow that might cause remote code execution in situations involving supplemental prompting by a Kerberos library. It may overflow a buffer provided by the underlying Kerberos library by a single '\0' byte if an attacker responds to a prompt with an answer of a carefully chosen length. The effect may range from heap corruption to stack corruption depending on the structure of the underlying Kerberos library, with unknown effects but possibly including code execution. This code path is not used for normal authentication, but only when the Kerberos library does supplemental prompting, such as with PKINIT or when using the non-standard no_prompt PAM configuration option..
CVSSv2.0 Score
- Severity
- High
- Base Score
- 7.5/10
- Exploit Score
- 10/10
- Access Vector
- Network
- Access Complexity
- Low
- Authentication Required
- None
- Impact Score
- 6.4/10
- Confidentiality Impact
- Partial
- Availability Impact
- Partial
- Integrity Impact
- Partial
CVSSv3.1 Score
- Severity
- Critical
- Base Score
- 9.8/10
- Exploit Score
- 3.9/10
- Access Vector
- Network
- Access Complexity
- Low
- Privileges Required
- None
- Impact Score
- 5.9/10
- Confidentiality Impact
- High
- Availability Impact
- High
- Integrity Impact
- High
- Scope
- Unchanged
- User Interaction
- None
Products Affected
CPE | Affected | Vulnerable | Excluding | Edit |
---|---|---|---|---|
cpe:2.3:a:pam-krb5_project:pam-krb5:*:*:*:*:*:*:*:* |
Yes
|
- | 4.9 | |
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* |
Yes
|
- | - | |
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* |
Yes
|
- | - | |
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* |
Yes
|
- | - |
References
- https://github.com/rra/pam-krb5/commit/e7879e27a37119fad4faf133a9f70bdcdc75d760
- http://www.openwall.com/lists/oss-security/2020/03/31/1
- https://www.debian.org/security/2020/dsa-4648
- https://lists.debian.org/debian-lts-announce/2020/04/msg00000.html
- https://usn.ubuntu.com/4314-1/
- https://www.eyrie.org/~eagle/software/pam-krb5/security/2020-03-30.html