File cups-2.2.7-CVE-2020-10001.patch of Package cups.29369
--- cups/ipp.c.orig 2021-01-11 10:53:43.080847679 +0100
+++ cups/ipp.c 2021-01-11 12:03:56.010423238 +0100
@@ -2965,7 +2965,8 @@ ippReadIO(void *src, /* I - Data
unsigned char *buffer, /* Data buffer */
string[IPP_MAX_TEXT],
/* Small string buffer */
- *bufptr; /* Pointer into buffer */
+ *bufptr, /* Pointer into buffer */
+ *bufend; /* End of buffer */
ipp_attribute_t *attr; /* Current attribute */
ipp_tag_t tag; /* Current tag */
ipp_tag_t value_tag; /* Current value tag */
@@ -3524,6 +3525,7 @@ ippReadIO(void *src, /* I - Data
}
bufptr = buffer;
+ bufend = buffer + n;
/*
* text-with-language and name-with-language are composite
@@ -3537,7 +3539,7 @@ ippReadIO(void *src, /* I - Data
n = (bufptr[0] << 8) | bufptr[1];
- if ((bufptr + 2 + n) >= (buffer + IPP_BUF_SIZE) || n >= (int)sizeof(string))
+ if ((bufptr + 2 + n + 2) > bufend || n >= (int)sizeof(string))
{
_cupsSetError(IPP_STATUS_ERROR_INTERNAL,
_("IPP language length overflows value."), 1);
@@ -3564,7 +3566,7 @@ ippReadIO(void *src, /* I - Data
bufptr += 2 + n;
n = (bufptr[0] << 8) | bufptr[1];
- if ((bufptr + 2 + n) >= (buffer + IPP_BUF_SIZE))
+ if ((bufptr + 2 + n) > bufend)
{
_cupsSetError(IPP_STATUS_ERROR_INTERNAL,
_("IPP string length overflows value."), 1);