Medium severity · published Apr 30, 2021
CVE-2021-20266
A flaw was found in RPM's hdrblobInit() in lib/header.c
4.9
CVSS
1.6%
EPSS
No
On KEV
Description
A flaw was found in RPM's hdrblobInit() in lib/header.c. This flaw allows an attacker who can modify the rpmdb to cause an out-of-bounds read. The highest threat from this vulnerability is to system availability.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.6% · higher than 76% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FE
Fedora · Fedoraproject
33; 34 · source: NVD
RP
Rpm · Rpm
before 4.16.1.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-20266
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-20266
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1927741
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMGXO3W6DHPO62GJ4VVF5DEUX5DRUR5K/
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VHRPNBCRPDJHHQE3MBPSZK4H7X2IM7AC/
Third Party Advisory
https://security.gentoo.org/glsa/202107-43
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