edk2-20210527gite1999b264f1f-3.el8
エラータID: AXSA:2021-2801:05
リリース日:
2021/12/20 Monday - 09:45
題名:
edk2-20210527gite1999b264f1f-3.el8
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]
- OpenSSL には、EVP_CipherUpdate, EVP_EncryptUpdate, EVP_DecryptUpdate の
呼び出しで、入力値がプラットフォーム上で許容される最大の整数に近い場合に、
出力値に整数オーバーフローが発生する問題があり、その場合、返り値が成功を示す
"1" であっても出力値が負の数になってしまうため、アプリケーションが正しく
動作しなかったり、クラッシュしてしまう脆弱性があります。(CVE-2021-23840)
- OpenSSL の公開 API である X509_issuer_and_serial_hash() には、X509 証明書の
発行者フィールドが悪意を持って構築されている場合、発行者フィールドを解析中に
エラーを正しく処理することに失敗する問題があり、NULL ポインタデリファレンスを
引き起こし、サービス拒否に繋がるクラッシュを発生させる脆弱性があります。
なお、X509_issuer_and_serial_hash() が OpenSSL から直接呼ばれることは無く、
アプリケーションが直接その関数を呼び出して、信頼できないソースから取得した
証明書のために使用する場合にのみ問題が発生します。(CVE-2021-23841)
解決策:
パッケージをアップデートしてください。
CVE:
CVE-2021-23840
Calls to EVP_CipherUpdate, EVP_EncryptUpdate and EVP_DecryptUpdate may overflow the output length argument in some cases where the input length is close to the maximum permissable length for an integer on the platform. In such cases the return value from the function call will be 1 (indicating success), but the output length value will be negative. This could cause applications to behave incorrectly or crash. OpenSSL versions 1.1.1i and below are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1j. OpenSSL versions 1.0.2x and below are affected by this issue. However OpenSSL 1.0.2 is out of support and no longer receiving public updates. Premium support customers of OpenSSL 1.0.2 should upgrade to 1.0.2y. Other users should upgrade to 1.1.1j. Fixed in OpenSSL 1.1.1j (Affected 1.1.1-1.1.1i). Fixed in OpenSSL 1.0.2y (Affected 1.0.2-1.0.2x).
Calls to EVP_CipherUpdate, EVP_EncryptUpdate and EVP_DecryptUpdate may overflow the output length argument in some cases where the input length is close to the maximum permissable length for an integer on the platform. In such cases the return value from the function call will be 1 (indicating success), but the output length value will be negative. This could cause applications to behave incorrectly or crash. OpenSSL versions 1.1.1i and below are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1j. OpenSSL versions 1.0.2x and below are affected by this issue. However OpenSSL 1.0.2 is out of support and no longer receiving public updates. Premium support customers of OpenSSL 1.0.2 should upgrade to 1.0.2y. Other users should upgrade to 1.1.1j. Fixed in OpenSSL 1.1.1j (Affected 1.1.1-1.1.1i). Fixed in OpenSSL 1.0.2y (Affected 1.0.2-1.0.2x).
CVE-2021-23841
The OpenSSL public API function X509_issuer_and_serial_hash() attempts to create a unique hash value based on the issuer and serial number data contained within an X509 certificate. However it fails to correctly handle any errors that may occur while parsing the issuer field (which might occur if the issuer field is maliciously constructed). This may subsequently result in a NULL pointer deref and a crash leading to a potential denial of service attack. The function X509_issuer_and_serial_hash() is never directly called by OpenSSL itself so applications are only vulnerable if they use this function directly and they use it on certificates that may have been obtained from untrusted sources. OpenSSL versions 1.1.1i and below are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1j. OpenSSL versions 1.0.2x and below are affected by this issue. However OpenSSL 1.0.2 is out of support and no longer receiving public updates. Premium support customers of OpenSSL 1.0.2 should upgrade to 1.0.2y. Other users should upgrade to 1.1.1j. Fixed in OpenSSL 1.1.1j (Affected 1.1.1-1.1.1i). Fixed in OpenSSL 1.0.2y (Affected 1.0.2-1.0.2x).
The OpenSSL public API function X509_issuer_and_serial_hash() attempts to create a unique hash value based on the issuer and serial number data contained within an X509 certificate. However it fails to correctly handle any errors that may occur while parsing the issuer field (which might occur if the issuer field is maliciously constructed). This may subsequently result in a NULL pointer deref and a crash leading to a potential denial of service attack. The function X509_issuer_and_serial_hash() is never directly called by OpenSSL itself so applications are only vulnerable if they use this function directly and they use it on certificates that may have been obtained from untrusted sources. OpenSSL versions 1.1.1i and below are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1j. OpenSSL versions 1.0.2x and below are affected by this issue. However OpenSSL 1.0.2 is out of support and no longer receiving public updates. Premium support customers of OpenSSL 1.0.2 should upgrade to 1.0.2y. Other users should upgrade to 1.1.1j. Fixed in OpenSSL 1.1.1j (Affected 1.1.1-1.1.1i). Fixed in OpenSSL 1.0.2y (Affected 1.0.2-1.0.2x).
追加情報:
N/A
ダウンロード:
SRPMS
- edk2-20210527gite1999b264f1f-3.el8.src.rpm
MD5: ef597ae4a5da36f9ecb944fb845802f0
SHA-256: f425308bc71dc26920c171b6d3ee1f20d07f9ac6a162a9a83091b97893064497
Size: 14.41 MB
Asianux Server 8 for x86_64
- edk2-ovmf-20210527gite1999b264f1f-3.el8.noarch.rpm
MD5: c4ae2c075bcd642bc619b850d396c5d1
SHA-256: e0888ba6608656649841636dd8a8edea594bfdc5a996fd0ad414a6bba46e9f94
Size: 3.65 MB
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