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author | Jeff Tinker <jtinker@google.com> | 2015-09-17 17:21:34 +0000 |
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committer | Android Git Automerger <android-git-automerger@android.com> | 2015-09-17 17:21:34 +0000 |
commit | d83f22552372edfe67473c29a370e0a025a91f21 (patch) | |
tree | 5a1836145623a6fd897fa2410540e7972f340785 /media | |
parent | ae683e22fdf3e7af41349be8f180af75b97e5f66 (diff) | |
parent | 99e63e75b670aeca1b4af401cb9582ba9fddf64d (diff) | |
download | frameworks_av-d83f22552372edfe67473c29a370e0a025a91f21.zip frameworks_av-d83f22552372edfe67473c29a370e0a025a91f21.tar.gz frameworks_av-d83f22552372edfe67473c29a370e0a025a91f21.tar.bz2 |
am 99e63e75: Merge "Fix for security vulnerability in media server DO NOT MERGE" into lmp-dev
* commit '99e63e75b670aeca1b4af401cb9582ba9fddf64d':
Fix for security vulnerability in media server DO NOT MERGE
Diffstat (limited to 'media')
-rw-r--r-- | media/libmedia/ICrypto.cpp | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/media/libmedia/ICrypto.cpp b/media/libmedia/ICrypto.cpp index 7bd120e..0d68ee7 100644 --- a/media/libmedia/ICrypto.cpp +++ b/media/libmedia/ICrypto.cpp @@ -255,7 +255,28 @@ status_t BnCrypto::onTransact( } AString errorDetailMsg; - ssize_t result = decrypt( + ssize_t result; + + size_t sumSubsampleSizes = 0; + bool overflow = false; + for (int32_t i = 0; i < numSubSamples; ++i) { + CryptoPlugin::SubSample &ss = subSamples[i]; + if (sumSubsampleSizes <= SIZE_MAX - ss.mNumBytesOfEncryptedData) { + sumSubsampleSizes += ss.mNumBytesOfEncryptedData; + } else { + overflow = true; + } + if (sumSubsampleSizes <= SIZE_MAX - ss.mNumBytesOfClearData) { + sumSubsampleSizes += ss.mNumBytesOfClearData; + } else { + overflow = true; + } + } + + if (overflow || sumSubsampleSizes != totalSize) { + result = -EINVAL; + } else { + result = decrypt( secure, key, iv, @@ -264,6 +285,7 @@ status_t BnCrypto::onTransact( subSamples, numSubSamples, secure ? secureBufferId : dstPtr, &errorDetailMsg); + } reply->writeInt32(result); |