Medium severity · published Jun 28, 2021
CVE-2021-35525
PostSRSd before 1.11 allows a denial of service (subprocess hang) if Postfix sends certain long data fields such as multiple concatenated email addresses
5.3
CVSS
1.7%
EPSS
No
On KEV
Description
PostSRSd before 1.11 allows a denial of service (subprocess hang) if Postfix sends certain long data fields such as multiple concatenated email addresses. NOTE: the PostSRSd maintainer acknowledges "theoretically, this error should never occur ... I'm not sure if there's a reliable way to trigger this condition by an external attacker, but it is a security bug in PostSRSd nevertheless."
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.7% · higher than 76% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PO
Postsrsd · Postsrsd Project
before 1.11 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-35525
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-35525
Issue Tracking
https://bugs.gentoo.org/793674
Patch
https://github.com/roehling/postsrsd/commit/077be98d8c8a9847e4ae0c7dc09e7474cbe27db2
Release Notes
https://github.com/roehling/postsrsd/releases/tag/1.11
Third Party Advisory
https://security.gentoo.org/glsa/202107-08
More from Postsrsd
7.5
CVE-2020-35573
srs2.c in PostSRSd before 1.10 allows remote attackers to cause a denial of service (CPU consumption) via a long timestamp tag in an SRS address