Merged update from upstream sources
This is an automated DistroBaker update from upstream sources. If you do not know what this is about or would like to opt out, contact the OSCI team. Source: https://src.fedoraproject.org/rpms/screen.git#3c99c3c628c3bd9be39673edab6843d2d6673f82
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screen-4.8.0-CVE-2021-26937.patch
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82
screen-4.8.0-CVE-2021-26937.patch
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@ -0,0 +1,82 @@
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diff -urNp a/ansi.c b/ansi.c
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--- a/ansi.c 2021-02-18 07:56:55.954674224 +0100
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+++ b/ansi.c 2021-02-18 08:04:25.005929307 +0100
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@@ -692,10 +692,6 @@ register int len;
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}
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curr->w_rend.font = 0;
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}
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-# ifdef DW_CHARS
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- if (curr->w_encoding == UTF8 && utf8_isdouble(c))
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- curr->w_mbcs = 0xff;
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-# endif
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if (curr->w_encoding == UTF8 && c >= 0x0300 && utf8_iscomb(c))
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{
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int ox, oy;
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@@ -730,6 +726,10 @@ register int len;
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}
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break;
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}
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+# ifdef DW_CHARS
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+ if (curr->w_encoding == UTF8 && utf8_isdouble(c))
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+ curr->w_mbcs = 0xff;
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+# endif
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font = curr->w_rend.font;
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# endif
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# ifdef DW_CHARS
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diff -urNp a/encoding.c b/encoding.c
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--- a/encoding.c 2021-02-18 07:56:55.949674177 +0100
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+++ b/encoding.c 2021-02-18 08:02:21.187750152 +0100
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@@ -43,7 +43,7 @@ static int encmatch __P((char *, char *
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# ifdef UTF8
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static int recode_char __P((int, int, int));
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static int recode_char_to_encoding __P((int, int));
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-static void comb_tofront __P((int, int));
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+static void comb_tofront __P((int));
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# ifdef DW_CHARS
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static int recode_char_dw __P((int, int *, int, int));
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static int recode_char_dw_to_encoding __P((int, int *, int));
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@@ -1263,6 +1263,8 @@ int c;
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{0x30000, 0x3FFFD},
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};
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+ if (c >= 0xdf00 && c <= 0xdfff)
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+ return 1; /* dw combining sequence */
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return ((bisearch(c, wide, sizeof(wide) / sizeof(struct interval) - 1)) ||
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(cjkwidth &&
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bisearch(c, ambiguous,
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@@ -1330,11 +1332,12 @@ int c;
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}
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static void
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-comb_tofront(root, i)
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-int root, i;
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+comb_tofront(i)
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+int i;
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{
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for (;;)
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{
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+ int root = i >= 0x700 ? 0x801 : 0x800;
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debug1("bring to front: %x\n", i);
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combchars[combchars[i]->prev]->next = combchars[i]->next;
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combchars[combchars[i]->next]->prev = combchars[i]->prev;
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@@ -1396,9 +1399,9 @@ struct mchar *mc;
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{
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/* full, recycle old entry */
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if (c1 >= 0xd800 && c1 < 0xe000)
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- comb_tofront(root, c1 - 0xd800);
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+ comb_tofront(c1 - 0xd800);
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i = combchars[root]->prev;
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- if (c1 == i + 0xd800)
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+ if (i == 0x800 || i == 0x801 || c1 == i + 0xd800)
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{
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/* completely full, can't recycle */
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debug("utf8_handle_comp: completely full!\n");
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@@ -1422,7 +1425,7 @@ struct mchar *mc;
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mc->font = (i >> 8) + 0xd8;
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mc->fontx = 0;
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debug3("combinig char %x %x -> %x\n", c1, c, i + 0xd800);
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- comb_tofront(root, i);
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+ comb_tofront(i);
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}
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#else /* !UTF8 */
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@ -4,7 +4,7 @@
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Summary: A screen manager that supports multiple logins on one terminal
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Name: screen
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Version: 4.8.0
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Release: 4%{?dist}
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Release: 5%{?dist}
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License: GPLv3+
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URL: http://www.gnu.org/software/screen
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Requires(pre): /usr/sbin/groupadd
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@ -23,6 +23,7 @@ Patch3: screen-E3.patch
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Patch4: screen-4.3.1-suppress_remap.patch
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Patch5: screen-4.3.1-crypt.patch
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Patch6: screen-4.8.0-expand-d_xtermosc.patch
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Patch7: screen-4.8.0-CVE-2021-26937.patch
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%description
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The screen utility allows you to have multiple logins on just one
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@ -116,6 +117,9 @@ rm -f $RPM_BUILD_ROOT%{_infodir}/dir
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%endif
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%changelog
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* Thu Feb 18 2021 Josef Ridky <jridky@redhat.com> - 4.8.0-5
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- fix CVE-2021-26937 (#1927066)
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* Wed Jan 27 2021 Fedora Release Engineering <releng@fedoraproject.org> - 4.8.0-4
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- Rebuilt for https://fedoraproject.org/wiki/Fedora_34_Mass_Rebuild
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