diff options
Diffstat (limited to 'gnu/packages/patches/ncurses-CVE-2017-10684-10685.patch')
| -rw-r--r-- | gnu/packages/patches/ncurses-CVE-2017-10684-10685.patch | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/gnu/packages/patches/ncurses-CVE-2017-10684-10685.patch b/gnu/packages/patches/ncurses-CVE-2017-10684-10685.patch new file mode 100644 index 0000000000..1f1b26801d --- /dev/null +++ b/gnu/packages/patches/ncurses-CVE-2017-10684-10685.patch @@ -0,0 +1,200 @@ +Fix CVE-2017-10684 and CVE-2017-10685: + +http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-10684 +http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-10685 + +Bug reports included proof of concept reproducer inputs: + +https://bugzilla.redhat.com/show_bug.cgi?id=1464684 +https://bugzilla.redhat.com/show_bug.cgi?id=1464685 +https://bugzilla.redhat.com/show_bug.cgi?id=1464686 +https://bugzilla.redhat.com/show_bug.cgi?id=1464687 +https://bugzilla.redhat.com/show_bug.cgi?id=1464688 +https://bugzilla.redhat.com/show_bug.cgi?id=1464691 +https://bugzilla.redhat.com/show_bug.cgi?id=1464692 + +Patches copied from ncurses patch release 20170701: + +ftp://invisible-island.net/ncurses/6.0/ncurses-6.0-20170701.patch.gz + +Excerpt from patch release announcement: + + + add/improve checks in tic's parser to address invalid input + (Redhat #1464684, #1464685, #1464686, #1464691). + + alloc_entry.c, add a check for a null-pointer. + + parse_entry.c, add several checks for valid pointers as well as + one check to ensure that a single character on a line is not + treated as the 2-character termcap short-name. + + the fixes for Redhat #1464685 obscured a problem subsequently + reported in Redhat #1464687; the given test-case was no longer + reproducible. Testing without the fixes for the earlier reports + showed a problem with buffer overflow in dump_entry.c, which is + addressed by reducing the use of a fixed-size buffer. + +https://lists.gnu.org/archive/html/bug-ncurses/2017-07/msg00001.html + +--- ncurses-6.0-20170624+/ncurses/tinfo/alloc_entry.c 2017-04-09 23:33:51.000000000 +0000 ++++ ncurses-6.0-20170701/ncurses/tinfo/alloc_entry.c 2017-06-27 23:48:55.000000000 +0000 +@@ -96,7 +96,11 @@ + { + char *result = 0; + size_t old_next_free = next_free; +- size_t len = strlen(string) + 1; ++ size_t len; ++ ++ if (string == 0) ++ return _nc_save_str(""); ++ len = strlen(string) + 1; + + if (len == 1 && next_free != 0) { + /* +--- ncurses-6.0-20170624+/ncurses/tinfo/parse_entry.c 2017-06-24 22:59:46.000000000 +0000 ++++ ncurses-6.0-20170701/ncurses/tinfo/parse_entry.c 2017-06-28 00:53:12.000000000 +0000 +@@ -236,13 +236,14 @@ + * implemented it. Note that the resulting terminal type was never the + * 2-character name, but was instead the first alias after that. + */ ++#define ok_TC2(s) (isgraph(UChar(s)) && (s) != '|') + ptr = _nc_curr_token.tk_name; + if (_nc_syntax == SYN_TERMCAP + #if NCURSES_XNAMES + && !_nc_user_definable + #endif + ) { +- if (ptr[2] == '|') { ++ if (ok_TC2(ptr[0]) && ok_TC2(ptr[1]) && (ptr[2] == '|')) { + ptr += 3; + _nc_curr_token.tk_name[2] = '\0'; + } +@@ -284,9 +285,11 @@ + if (is_use || is_tc) { + entryp->uses[entryp->nuses].name = _nc_save_str(_nc_curr_token.tk_valstring); + entryp->uses[entryp->nuses].line = _nc_curr_line; +- entryp->nuses++; +- if (entryp->nuses > 1 && is_tc) { +- BAD_TC_USAGE ++ if (VALID_STRING(entryp->uses[entryp->nuses].name)) { ++ entryp->nuses++; ++ if (entryp->nuses > 1 && is_tc) { ++ BAD_TC_USAGE ++ } + } + } else { + /* normal token lookup */ +@@ -588,7 +591,7 @@ + static void + append_acs(string_desc * dst, int code, char *src) + { +- if (src != 0 && strlen(src) == 1) { ++ if (VALID_STRING(src) && strlen(src) == 1) { + append_acs0(dst, code, *src); + } + } +@@ -849,15 +852,14 @@ + } + + if (tp->Strings[to_ptr->nte_index]) { ++ const char *s = tp->Strings[from_ptr->nte_index]; ++ const char *t = tp->Strings[to_ptr->nte_index]; + /* There's no point in warning about it if it's the same + * string; that's just an inefficiency. + */ +- if (strcmp( +- tp->Strings[from_ptr->nte_index], +- tp->Strings[to_ptr->nte_index]) != 0) ++ if (VALID_STRING(s) && VALID_STRING(t) && strcmp(s, t) != 0) + _nc_warning("%s (%s) already has an explicit value %s, ignoring ko", +- ap->to, ap->from, +- _nc_visbuf(tp->Strings[to_ptr->nte_index])); ++ ap->to, ap->from, t); + continue; + } + +--- ncurses-6.0-20170624+/progs/dump_entry.c 2017-06-23 22:47:43.000000000 +0000 ++++ ncurses-6.0-20170701/progs/dump_entry.c 2017-07-01 11:27:29.000000000 +0000 +@@ -841,9 +841,10 @@ + PredIdx num_strings = 0; + bool outcount = 0; + +-#define WRAP_CONCAT \ +- wrap_concat(buffer); \ +- outcount = TRUE ++#define WRAP_CONCAT1(s) wrap_concat(s); outcount = TRUE ++#define WRAP_CONCAT2(a,b) wrap_concat(a); WRAP_CONCAT1(b) ++#define WRAP_CONCAT3(a,b,c) wrap_concat(a); WRAP_CONCAT2(b,c) ++#define WRAP_CONCAT WRAP_CONCAT1(buffer) + + len = 12; /* terminfo file-header */ + +@@ -1007,9 +1008,9 @@ + set_attributes = save_sgr; + + trimmed_sgr0 = _nc_trim_sgr0(tterm); +- if (strcmp(capability, trimmed_sgr0)) ++ if (strcmp(capability, trimmed_sgr0)) { + capability = trimmed_sgr0; +- else { ++ } else { + if (trimmed_sgr0 != exit_attribute_mode) + free(trimmed_sgr0); + } +@@ -1046,13 +1047,21 @@ + _nc_SPRINTF(buffer, _nc_SLIMIT(sizeof(buffer)) + "%s=!!! %s WILL NOT CONVERT !!!", + name, srccap); ++ WRAP_CONCAT; + } else if (suppress_untranslatable) { + continue; + } else { + char *s = srccap, *d = buffer; +- _nc_SPRINTF(d, _nc_SLIMIT(sizeof(buffer)) "..%s=", name); +- d += strlen(d); ++ WRAP_CONCAT3("..", name, "="); + while ((*d = *s++) != 0) { ++ if ((d - buffer - 1) >= (int) sizeof(buffer)) { ++ fprintf(stderr, ++ "%s: value for %s is too long\n", ++ _nc_progname, ++ name); ++ *d = '\0'; ++ break; ++ } + if (*d == ':') { + *d++ = '\\'; + *d = ':'; +@@ -1061,13 +1070,12 @@ + } + d++; + } ++ WRAP_CONCAT; + } + } else { +- _nc_SPRINTF(buffer, _nc_SLIMIT(sizeof(buffer)) +- "%s=%s", name, cv); ++ WRAP_CONCAT3(name, "=", cv); + } + len += (int) strlen(capability) + 1; +- WRAP_CONCAT; + } else { + char *src = _nc_tic_expand(capability, + outform == F_TERMINFO, numbers); +@@ -1083,8 +1091,7 @@ + strcpy_DYN(&tmpbuf, src); + } + len += (int) strlen(capability) + 1; +- wrap_concat(tmpbuf.text); +- outcount = TRUE; ++ WRAP_CONCAT1(tmpbuf.text); + } + } + /* e.g., trimmed_sgr0 */ +@@ -1526,7 +1533,8 @@ + } + if (len > critlen) { + (void) fprintf(stderr, +- "warning: %s entry is %d bytes long\n", ++ "%s: %s entry is %d bytes long\n", ++ _nc_progname, + _nc_first_name(tterm->term_names), + len); + SHOW_WHY("# WARNING: this entry, %d bytes long, may core-dump %s libraries!\n", |