CVE-2015-7540
The LDAP server in the AD domain controller in Samba 4.x before 4.1.22 does not check return values to ensure successful ASN.1 memory allocation, which allows remote attackers to cause a denial of service (memory consumption and daemon crash) via…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (7.12%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
The LDAP server in the AD domain controller in Samba 4.x before 4.1.22 does not check return values to ensure successful ASN.1 memory allocation, which allows remote attackers to cause a denial of service (memory consumption and daemon crash) via crafted packets.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 7.12% probability · 94th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-399
- Affected
- samba/samba · canonical/ubuntu linux · debian/debian linux
- Source
- secalert@redhat.com
EPSS 7.1% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174076.htmlThird Party Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174391.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00033.htmlMailing List, Third Party Advisory
- http://www.debian.org/security/2016/dsa-3433Third Party Advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.htmlThird Party Advisory
- http://www.securityfocus.com/bid/79736Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1034492Third Party Advisory, VDB Entry
- http://www.ubuntu.com/usn/USN-2855-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-2855-2Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1288451Issue Tracking, Third Party Advisory
- https://git.samba.org/?p=samba.git%3Ba=commit%3Bh=530d50a1abdcdf4d1775652d4c456c1274d83d8d
- https://git.samba.org/?p=samba.git%3Ba=commit%3Bh=9d989c9dd7a5b92d0c5d65287935471b83b6e884
- https://security.gentoo.org/glsa/201612-47Third Party Advisory
- https://www.samba.org/samba/security/CVE-2015-7540.htmlVendor Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174076.htmlThird Party Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174391.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00033.htmlMailing List, Third Party Advisory
- http://www.debian.org/security/2016/dsa-3433Third Party Advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.htmlThird Party Advisory
- http://www.securityfocus.com/bid/79736Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1034492Third Party Advisory, VDB Entry
- http://www.ubuntu.com/usn/USN-2855-1Third Party Advisory
- http://www.ubuntu.com/usn/USN-2855-2Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1288451Issue Tracking, Third Party Advisory
- https://git.samba.org/?p=samba.git%3Ba=commit%3Bh=530d50a1abdcdf4d1775652d4c456c1274d83d8d
- https://git.samba.org/?p=samba.git%3Ba=commit%3Bh=9d989c9dd7a5b92d0c5d65287935471b83b6e884
- https://security.gentoo.org/glsa/201612-47Third Party Advisory
- https://www.samba.org/samba/security/CVE-2015-7540.htmlVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.