PurpleI2P/i2pd
1
0
Fork 0
mirror of https://github.com/PurpleI2P/i2pd.git synced 2025-01-11 13:27:52 +00:00
Code Issues Releases Activity

libi2pd: fix undefined behaviour and memory overruns

Browse Source 
This fixes the following issues (flagged by cppcheck):
[libi2pd/ECIESX25519AEADRatchetSession.cpp:537]: (error) Buffer is accessed out of bounds: m_NSREncodedKey
[libi2pd/Identity.cpp:22]: (error) Buffer is accessed out of bounds: keys.publicKey
[libi2pd/Identity.cpp:22]: (error) Buffer is accessed out of bounds: publicKey
[libi2pd/NetDb.cpp:70] -> [libi2pd/NetDb.cpp:69]: (error) Iterator 'it' used after element has been erased
[libi2pd/SSUData.cpp:186] -> [libi2pd/SSUData.cpp:187]: (warning) Shifting 32-bit value by 63 bits is undefined behaviour.
This commit is contained in:
Simon Vetter 2021-10-18 12:09:56 +02:00
parent af794f901f
commit a348e10620
4 changed files with 5 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
libi2pd/ECIESX25519AEADRatchetSession.cpp
View File

@ -534,7 +534,7 @@ namespace garlic
LogPrint (eLogError, "Garlic: Can't encode elligator");
return false;
}
memcpy (m_NSREncodedKey, out + offset, 56); // for possible next NSR
memcpy (m_NSREncodedKey, out + offset, 32); // for possible next NSR
memcpy (m_NSRH, m_H, 32);
offset += 32;
// KDF for Reply Key Section

3
libi2pd/Identity.cpp
View File

@ -19,7 +19,8 @@ namespace data
Identity& Identity::operator=(const Keys& keys)
{
// copy public and signing keys together
memcpy (publicKey, keys.publicKey, sizeof (publicKey) + sizeof (signingKey));
memcpy (publicKey, keys.publicKey, sizeof (publicKey));
memcpy (signingKey, keys.signingKey, sizeof (signingKey));
memset (certificate, 0, sizeof (certificate));
return *this;
}

2
libi2pd/NetDb.cpp
View File

@ -66,8 +66,8 @@ namespace data
if (it != m_RouterInfos.end ())
{
// remove own router
m_RouterInfos.erase (it);
m_Floodfills.remove (it->second);
m_RouterInfos.erase (it);
}
// insert own router
m_RouterInfos.emplace (i2p::context.GetIdentHash (), i2p::context.GetSharedRouterInfo ());

2
libi2pd/SSUData.cpp
View File

@ -185,7 +185,7 @@ namespace transport
auto& incompleteMessage = it->second;
// mark fragment as received
if (fragmentNum < 64)
incompleteMessage->receivedFragmentsBits |= (0x01 << fragmentNum);
incompleteMessage->receivedFragmentsBits |= (uint64_t(0x01) << fragmentNum);
else
LogPrint (eLogWarning, "SSU: Fragment number ", fragmentNum, " exceeds 64");