High severity · published Mar 6, 2023
CVE-2022-45142
The fix for CVE-2022-3437 included changing memcmp to be constant time and a workaround for a compiler bug by adding "!= 0" comparisons to the result of memcmp
7.5
CVSS
0.5%
EPSS
No
On KEV
Description
The fix for CVE-2022-3437 included changing memcmp to be constant time and a workaround for a compiler bug by adding "!= 0" comparisons to the result of memcmp. When these patches were backported to the heimdal-7.7.1 and heimdal-7.8.0 branches (and possibly other branches) a logic inversion sneaked in causing the validation of message integrity codes in gssapi/arcfour to be inverted.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 42% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HE
Heimdal · Heimdal Project
7.7.1; 7.8.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-45142
CVE.org
https://www.cve.org/CVERecord?id=CVE-2022-45142
security.gentoo.org
https://security.gentoo.org/glsa/202310-06
Mailing List
https://www.openwall.com/lists/oss-security/2023/02/08/1
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