According to the versions of the libldb packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - A flaw was found in Samba's libldb. Multiple,     consecutive leading spaces in an LDAP attribute can     lead to an out-of-bounds memory write, leading to a     crash of the LDAP server process handling the request.
    The highest threat from this vulnerability is to system     availability.(CVE-2021-20277)

  - A flaw was found in samba. Spaces used in a string     around a domain name (DN), while supposed to be     ignored, can cause invalid DN strings with spaces to     instead write a zero-byte into out-of-bounds memory,     resulting in a crash. The highest threat from this     vulnerability is to system     availability.(CVE-2020-27840)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote SUSE Linux SUSE15 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2021:3187-1 advisory.

  - A flaw was found in samba. Spaces used in a string around a domain name (DN), while supposed to be     ignored, can cause invalid DN strings with spaces to instead write a zero-byte into out-of-bounds memory,     resulting in a crash. The highest threat from this vulnerability is to system availability.
    (CVE-2020-27840)

  - A flaw was found in samba. The Samba smbd file server must map Windows group identities (SIDs) into unix     group ids (gids). The code that performs this had a flaw that could allow it to read data beyond the end     of the array in the case where a negative cache entry had been added to the mapping cache. This could     cause the calling code to return those values into the process token that stores the group membership for     a user. The highest threat from this vulnerability is to data confidentiality and integrity.
    (CVE-2021-20254)

  - A flaw was found in Samba's libldb. Multiple, consecutive leading spaces in an LDAP attribute can lead to     an out-of-bounds memory write, leading to a crash of the LDAP server process handling the request. The     highest threat from this vulnerability is to system availability. (CVE-2021-20277)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote AlmaLinux 8 host has packages installed that are affected by a vulnerability as referenced in the ALSA-2021:1197 advisory.

  - A flaw was found in Samba's libldb. Multiple, consecutive leading spaces in an LDAP attribute can lead to     an out-of-bounds memory write, leading to a crash of the LDAP server process handling the request. The     highest threat from this vulnerability is to system availability. (CVE-2021-20277)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2021:1072 advisory.

    The libldb packages provide an extensible library that implements an LDAP-like API to access remote LDAP     servers, or use local TDB databases.

    Security Fix(es):

    * samba: Out of bounds read in AD DC LDAP server (CVE-2021-20277)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2021:1197 advisory.

    The libldb packages provide an extensible library that implements an LDAP-like API to access remote LDAP     servers, or use local TDB databases.

    Security Fix(es):

    * samba: Out of bounds read in AD DC LDAP server (CVE-2021-20277)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The version of libldb installed on the remote host is prior to 1.5.4-2.17. It is, therefore, affected by a vulnerability as referenced in the ALAS-2021-1494 advisory.

    A flaw was found in Samba's libldb. Multiple, consecutive leading spaces in an LDAP attribute can lead to     an out-of-bounds memory write, leading to a crash of the LDAP server process handling the request. The     highest threat from this vulnerability is to system availability. (CVE-2021-20277)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

According to the version of the libldb packages installed, the EulerOS installation on the remote host is affected by the following vulnerability :

  - A flaw was found in Samba's libldb. Multiple,     consecutive leading spaces in an LDAP attribute can     lead to an out-of-bounds memory write, leading to a     crash of the LDAP server process handling the request.
    The highest threat from this vulnerability is to system     availability.(CVE-2021-20277)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update for samba fixes the following issues :

CVE-2021-20277: Fixed an out of bounds read in ldb_handler_fold (bsc#1183574).

CVE-2021-20254: Fixed a buffer overrun in sids_to_unixids() (bsc#1184677).

CVE-2020-27840: Fixed an unauthenticated remote heap corruption via bad DNs (bsc#1183572).

Avoid free'ing our own pointer in memcache when memcache_trim attempts to reduce cache size (bsc#1179156).

s3-libads: use dns name to open a ldap session (bsc#1184310).

Adjust smbcacls '--propagate-inheritance' feature to align with upstream (bsc#1178469).

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the samba packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - A flaw was found in Samba's libldb. Multiple,     consecutive leading spaces in an LDAP attribute can     lead to an out-of-bounds memory write, leading to a     crash of the LDAP server process handling the request.
    The highest threat from this vulnerability is to system     availability.(CVE-2021-20277)

  - A flaw was found in samba. Spaces used in a string     around a domain name (DN), while supposed to be     ignored, can cause invalid DN strings with spaces to     instead write a zero-byte into out-of-bounds memory,     resulting in a crash. The highest threat from this     vulnerability is to system     availability.(CVE-2020-27840)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the samba packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - An extensible library that implements an LDAP like API     to access remote LDAPservers, or use local tdb     databases.(CVE-2020-27840)

  - A flaw was found in Samba's libldb. Multiple,     consecutive leading spaces in an LDAP attribute can     lead to an out-of-bounds memory write, leading to a     crash of the LDAP server process handling the request.
    The highest threat from this vulnerability is to system     availability.(CVE-2021-20277)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the samba packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - A flaw was found in samba. Multiple, consecutive     leading spaces in an LDAP attribute can lead to an     out-of-bounds memory write. The highest threat from     this vulnerability is to system     availability.(CVE-2021-20277)

  - A flaw was found in samba. Spaces used in a string     around a domain name (DN), while supposed to be     ignored, can cause invalid DN strings with spaces to     instead write a zero-byte into out-of-bounds memory,     resulting in a crash. The highest threat from this     vulnerability is to system     availability.(CVE-2020-27840)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the libldb packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - A flaw was found in Samba's libldb. Multiple,     consecutive leading spaces in an LDAP attribute can     lead to an out-of-bounds memory write, leading to a     crash of the LDAP server process handling the request.
    The highest threat from this vulnerability is to system     availability.(CVE-2021-20277)

  - An extensible library that implements an LDAP like API     to access remote LDAPservers, or use local tdb     databases.(CVE-2020-27840)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the samba packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - A flaw was found in Samba's libldb. Multiple,     consecutive leading spaces in an LDAP attribute can     lead to an out-of-bounds memory write, leading to a     crash of the LDAP server process handling the request.
    The highest threat from this vulnerability is to system     availability.(CVE-2021-20277)

  - An extensible library that implements an LDAP like API     to access remote LDAPservers, or use local tdb     databases.(CVE-2020-27840)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
153315	EulerOS 2.0 SP2 : libldb (EulerOS-SA-2021-2397)	Nessus	Huawei Local Security Checks	2021/9/14	2021/9/16	high
153579	openSUSE 15 Security Update : samba (openSUSE-SU-2021:3187-1)	Nessus	SuSE Local Security Checks	2021/9/23	2022/1/26	medium
157598	AlmaLinux 8 : libldb (ALSA-2021:1197)	Nessus	Alma Linux Local Security Checks	2022/2/9	2022/2/14	high
148333	RHEL 7 : libldb (RHSA-2021:1072)	Nessus	Red Hat Local Security Checks	2021/4/6	2024/11/7	high
148564	RHEL 8 : libldb (RHSA-2021:1197)	Nessus	Red Hat Local Security Checks	2021/4/15	2025/3/6	high
148899	Amazon Linux AMI : libldb (ALAS-2021-1494)	Nessus	Amazon Linux Local Security Checks	2021/4/21	2024/12/11	high
149118	EulerOS 2.0 SP3 : libldb (EulerOS-SA-2021-1811)	Nessus	Huawei Local Security Checks	2021/4/30	2021/5/24	high
149185	SUSE SLED15 / SLES15 Security Update : samba (SUSE-SU-2021:1444-1)	Nessus	SuSE Local Security Checks	2021/4/30	2022/1/26	medium
151029	EulerOS 2.0 SP8 : samba (EulerOS-SA-2021-1988)	Nessus	Huawei Local Security Checks	2021/6/28	2023/12/12	high
151247	EulerOS 2.0 SP9 : samba (EulerOS-SA-2021-2055)	Nessus	Huawei Local Security Checks	2021/7/1	2023/12/11	high
151257	EulerOS Virtualization 3.0.6.6 : samba (EulerOS-SA-2021-2026)	Nessus	Huawei Local Security Checks	2021/7/1	2023/12/11	high
151779	EulerOS 2.0 SP5 : libldb (EulerOS-SA-2021-2222)	Nessus	Huawei Local Security Checks	2021/7/16	2023/12/7	high
151789	EulerOS 2.0 SP5 : samba (EulerOS-SA-2021-2229)	Nessus	Huawei Local Security Checks	2021/7/16	2023/12/7	high

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