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Fix heap buffer overflow in NXDN Layer3 data handling

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This commit is contained in:
Ember 2026-04-05 17:48:24 -07:00
parent a2309124c7
commit 50c6531484
1 changed files with 7 additions and 7 deletions
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14
NXDNLayer3.cpp
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@ -33,15 +33,15 @@ const unsigned char BIT_MASK_TABLE[] = { 0x80U, 0x40U, 0x20U, 0x10U, 0x08U, 0x04
CNXDNLayer3::CNXDNLayer3(const CNXDNLayer3& layer3) :
m_data(nullptr)
{
m_data = new unsigned char[22U];
::memcpy(m_data, layer3.m_data, 22U);
m_data = new unsigned char[23U];
::memcpy(m_data, layer3.m_data, 23U);
}
CNXDNLayer3::CNXDNLayer3() :
m_data(nullptr)
{
m_data = new unsigned char[22U];
::memset(m_data, 0x00U, 22U);
m_data = new unsigned char[23U];
::memset(m_data, 0x00U, 23U);
}
CNXDNLayer3::~CNXDNLayer3()
@ -101,19 +101,19 @@ void CNXDNLayer3::getData(unsigned char* data) const
void CNXDNLayer3::setData(const unsigned char* data, unsigned int length)
{
::memset(m_data, 0x00U, 22U);
::memset(m_data, 0x00U, 23U);
::memcpy(m_data, data, length);
}
void CNXDNLayer3::reset()
{
::memset(m_data, 0x00U, 22U);
::memset(m_data, 0x00U, 23U);
}
CNXDNLayer3& CNXDNLayer3::operator=(const CNXDNLayer3& layer3)
{
if (&layer3 != this)
::memcpy(m_data, layer3.m_data, 22U);
::memcpy(m_data, layer3.m_data, 23U);
return *this;
}