gssntlmssp-1.2.0-1.el8.ML.1
エラータID: AXSA:2023-6149:01
リリース日:
2023/06/28 Wednesday - 01:14
題名:
gssntlmssp-1.2.0-1.el8.ML.1
影響のあるチャネル:
Asianux Server 8 for x86_64
Severity:
Moderate
Description:
以下項目について対処しました。
[Security Fix]
- GSS-NTLMSSP には、NTLM フィールドをデコードする複数の
関数に境界外読み取りが発生する問題があるため、リモートの
攻撃者により、4GB を超える長さのトークンを許可するアプリ
ケーション上の gss_accept_sec_context エントリーポイントを
介して、サービス拒否攻撃を可能とする脆弱性が存在します。
(CVE-2023-25563)
- GSS-NTLMSSP の UTF-16 文字列をデコードする関数には、
メモリ破壊に至る問題があるため、リモートの攻撃者により、
ntlm_str_convert() 関数の失敗を介して、サービス拒否攻撃を
可能とする脆弱性が存在します。(CVE-2023-25564)
- GSS-NTLMSSP の gss_accept_sec_context() 関数には、free(3)
関数利用時のアサーションに失敗する問題があるため、リモート
の攻撃者により、デコード処理時の不正なメモリ領域の解放操作
を介して、サービス拒否攻撃を可能とする脆弱性が存在します。
(CVE-2023-25565)
- GSS-NTLMSSP の gss_accept_sec_context() 関数には、メモリ
リークの問題があるため、リモートの攻撃者により、細工された
ユーザー名の解析を介して、サービス拒否攻撃を可能とする脆弱性
が存在します。(CVE-2023-25566)
- GSS-NTLMSSP の gss_accept_sec_context() 関数には、av_pair
変数のチェック処理の不備に起因するメモリ領域の範囲外読み取り
の問題があるため、リモートの攻撃者により、サービス拒否攻撃を
可能とする脆弱性が存在します。(CVE-2023-25567)
解決策:
パッケージをアップデートしてください。
CVE:
CVE-2023-25563
GSS-NTLMSSP is a mechglue plugin for the GSSAPI library that implements NTLM authentication. Prior to version 1.2.0, multiple out-of-bounds reads when decoding NTLM fields can trigger a denial of service. A 32-bit integer overflow condition can lead to incorrect checks of consistency of length of internal buffers. Although most applications will error out before accepting a singe input buffer of 4GB in length this could theoretically happen. This vulnerability can be triggered via the main `gss_accept_sec_context` entry point if the application allows tokens greater than 4GB in length. This can lead to a large, up to 65KB, out-of-bounds read which could cause a denial-of-service if it reads from unmapped memory. Version 1.2.0 contains a patch for the out-of-bounds reads.
GSS-NTLMSSP is a mechglue plugin for the GSSAPI library that implements NTLM authentication. Prior to version 1.2.0, multiple out-of-bounds reads when decoding NTLM fields can trigger a denial of service. A 32-bit integer overflow condition can lead to incorrect checks of consistency of length of internal buffers. Although most applications will error out before accepting a singe input buffer of 4GB in length this could theoretically happen. This vulnerability can be triggered via the main `gss_accept_sec_context` entry point if the application allows tokens greater than 4GB in length. This can lead to a large, up to 65KB, out-of-bounds read which could cause a denial-of-service if it reads from unmapped memory. Version 1.2.0 contains a patch for the out-of-bounds reads.
CVE-2023-25564
GSS-NTLMSSP is a mechglue plugin for the GSSAPI library that implements NTLM authentication. Prior to version 1.2.0, memory corruption can be triggered when decoding UTF16 strings. The variable `outlen` was not initialized and could cause writing a zero to an arbitrary place in memory if `ntlm_str_convert()` were to fail, which would leave `outlen` uninitialized. This can lead to a denial of service if the write hits unmapped memory or randomly corrupts a byte in the application memory space. This vulnerability can trigger an out-of-bounds write, leading to memory corruption. This vulnerability can be triggered via the main `gss_accept_sec_context` entry point. This issue is fixed in version 1.2.0.
GSS-NTLMSSP is a mechglue plugin for the GSSAPI library that implements NTLM authentication. Prior to version 1.2.0, memory corruption can be triggered when decoding UTF16 strings. The variable `outlen` was not initialized and could cause writing a zero to an arbitrary place in memory if `ntlm_str_convert()` were to fail, which would leave `outlen` uninitialized. This can lead to a denial of service if the write hits unmapped memory or randomly corrupts a byte in the application memory space. This vulnerability can trigger an out-of-bounds write, leading to memory corruption. This vulnerability can be triggered via the main `gss_accept_sec_context` entry point. This issue is fixed in version 1.2.0.
CVE-2023-25565
GSS-NTLMSSP is a mechglue plugin for the GSSAPI library that implements NTLM authentication. Prior to version 1.2.0, an incorrect free when decoding target information can trigger a denial of service. The error condition incorrectly assumes the `cb` and `sh` buffers contain a copy of the data that needs to be freed. However, that is not the case. This vulnerability can be triggered via the main `gss_accept_sec_context` entry point. This will likely trigger an assertion failure in `free`, causing a denial-of-service. This issue is fixed in version 1.2.0.
GSS-NTLMSSP is a mechglue plugin for the GSSAPI library that implements NTLM authentication. Prior to version 1.2.0, an incorrect free when decoding target information can trigger a denial of service. The error condition incorrectly assumes the `cb` and `sh` buffers contain a copy of the data that needs to be freed. However, that is not the case. This vulnerability can be triggered via the main `gss_accept_sec_context` entry point. This will likely trigger an assertion failure in `free`, causing a denial-of-service. This issue is fixed in version 1.2.0.
CVE-2023-25566
GSS-NTLMSSP is a mechglue plugin for the GSSAPI library that implements NTLM authentication. Prior to version 1.2.0, a memory leak can be triggered when parsing usernames which can trigger a denial-of-service. The domain portion of a username may be overridden causing an allocated memory area the size of the domain name to be leaked. An attacker can leak memory via the main `gss_accept_sec_context` entry point, potentially causing a denial-of-service. This issue is fixed in version 1.2.0.
GSS-NTLMSSP is a mechglue plugin for the GSSAPI library that implements NTLM authentication. Prior to version 1.2.0, a memory leak can be triggered when parsing usernames which can trigger a denial-of-service. The domain portion of a username may be overridden causing an allocated memory area the size of the domain name to be leaked. An attacker can leak memory via the main `gss_accept_sec_context` entry point, potentially causing a denial-of-service. This issue is fixed in version 1.2.0.
CVE-2023-25567
GSS-NTLMSSP, a mechglue plugin for the GSSAPI library that implements NTLM authentication, has an out-of-bounds read when decoding target information prior to version 1.2.0. The length of the `av_pair` is not checked properly for two of the elements which can trigger an out-of-bound read. The out-of-bounds read can be triggered via the main `gss_accept_sec_context` entry point and could cause a denial-of-service if the memory is unmapped. The issue is fixed in version 1.2.0.
GSS-NTLMSSP, a mechglue plugin for the GSSAPI library that implements NTLM authentication, has an out-of-bounds read when decoding target information prior to version 1.2.0. The length of the `av_pair` is not checked properly for two of the elements which can trigger an out-of-bound read. The out-of-bounds read can be triggered via the main `gss_accept_sec_context` entry point and could cause a denial-of-service if the memory is unmapped. The issue is fixed in version 1.2.0.
追加情報:
N/A
ダウンロード:
SRPMS
- gssntlmssp-1.2.0-1.el8.ML.1.src.rpm
MD5: 611dbb03bedfaae98014ac2be37a77c8
SHA-256: af98095b3e8674e891336e5efcfa24bbd5c8218330a533935311e3cc8051d2fe
Size: 474.94 kB
Asianux Server 8 for x86_64
- gssntlmssp-1.2.0-1.el8.ML.1.x86_64.rpm
MD5: d101d040a88eb8887ba9a7312601bddd
SHA-256: 5fa134d274573843686f4c3821581c11a846efc794ea0f5462f815c6020cf465
Size: 71.99 kB
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