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* do not write outside heap bufferJim Meyering2012-10-021-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * parsing.c (substr): Handle tail < head. This started when I noticed some cgit segfaults on savannah.gnu.org. Finding the offending URL/commit and then constructing a stand-alone reproducer were far more time-consuming than writing the actual patch. The problem arises with a commit like this, in which the user name part of the "Author" field is empty: $ git log -1 commit 6f3f41d73393278f3ede68a2cb1e7a2a23fa3421 Author: <T at h.or> Date: Mon Apr 23 22:29:16 2012 +0200 Here's what happens: (this is due to buf=malloc(0); strncpy (buf, head, -1); where "head" may point to plenty of attacker-specified non-NUL bytes, so we can overwrite a zero-length heap buffer with arbitrary data) Invalid write of size 1 at 0x4A09361: strncpy (mc_replace_strmem.c:463) by 0x408977: substr (parsing.c:61) by 0x4089EF: parse_user (parsing.c:73) by 0x408D10: cgit_parse_commit (parsing.c:153) by 0x40A540: cgit_mk_refinfo (shared.c:171) by 0x40A581: cgit_refs_cb (shared.c:181) by 0x43DEB3: do_for_each_ref (refs.c:690) by 0x41075E: cgit_print_branches (ui-refs.c:191) by 0x416EF2: cgit_print_summary (ui-summary.c:56) by 0x40780A: summary_fn (cmd.c:120) by 0x40667A: process_request (cgit.c:544) by 0x404078: cache_process (cache.c:322) Address 0x4c718d0 is 0 bytes after a block of size 0 alloc'd at 0x4A0884D: malloc (vg_replace_malloc.c:263) by 0x455C85: xmalloc (wrapper.c:35) by 0x40894C: substr (parsing.c:60) by 0x4089EF: parse_user (parsing.c:73) by 0x408D10: cgit_parse_commit (parsing.c:153) by 0x40A540: cgit_mk_refinfo (shared.c:171) by 0x40A581: cgit_refs_cb (shared.c:181) by 0x43DEB3: do_for_each_ref (refs.c:690) by 0x41075E: cgit_print_branches (ui-refs.c:191) by 0x416EF2: cgit_print_summary (ui-summary.c:56) by 0x40780A: summary_fn (cmd.c:120) by 0x40667A: process_request (cgit.c:544) Invalid write of size 1 at 0x4A09400: strncpy (mc_replace_strmem.c:463) by 0x408977: substr (parsing.c:61) by 0x4089EF: parse_user (parsing.c:73) by 0x408D10: cgit_parse_commit (parsing.c:153) by 0x40A540: cgit_mk_refinfo (shared.c:171) by 0x40A581: cgit_refs_cb (shared.c:181) by 0x43DEB3: do_for_each_ref (refs.c:690) by 0x41075E: cgit_print_branches (ui-refs.c:191) by 0x416EF2: cgit_print_summary (ui-summary.c:56) by 0x40780A: summary_fn (cmd.c:120) by 0x40667A: process_request (cgit.c:544) by 0x404078: cache_process (cache.c:322) Address 0x4c7192b is not stack'd, malloc'd or (recently) free'd Invalid write of size 1 at 0x4A0940E: strncpy (mc_replace_strmem.c:463) by 0x408977: substr (parsing.c:61) by 0x4089EF: parse_user (parsing.c:73) by 0x408D10: cgit_parse_commit (parsing.c:153) by 0x40A540: cgit_mk_refinfo (shared.c:171) by 0x40A581: cgit_refs_cb (shared.c:181) by 0x43DEB3: do_for_each_ref (refs.c:690) by 0x41075E: cgit_print_branches (ui-refs.c:191) by 0x416EF2: cgit_print_summary (ui-summary.c:56) by 0x40780A: summary_fn (cmd.c:120) by 0x40667A: process_request (cgit.c:544) by 0x404078: cache_process (cache.c:322) Address 0x4c7192d is not stack'd, malloc'd or (recently) free'd Process terminating with default action of signal 11 (SIGSEGV) Access not within mapped region at address 0x502F000 at 0x4A09400: strncpy (mc_replace_strmem.c:463) by 0x408977: substr (parsing.c:61) by 0x4089EF: parse_user (parsing.c:73) by 0x408D10: cgit_parse_commit (parsing.c:153) by 0x40A540: cgit_mk_refinfo (shared.c:171) by 0x40A581: cgit_refs_cb (shared.c:181) by 0x43DEB3: do_for_each_ref (refs.c:690) by 0x41075E: cgit_print_branches (ui-refs.c:191) by 0x416EF2: cgit_print_summary (ui-summary.c:56) by 0x40780A: summary_fn (cmd.c:120) by 0x40667A: process_request (cgit.c:544) by 0x404078: cache_process (cache.c:322) This happens when tail - head == -1 here: (parsing.c) char *substr(const char *head, const char *tail) { char *buf; buf = xmalloc(tail - head + 1); strncpy(buf, head, tail - head); buf[tail - head] = '\0'; return buf; } char *parse_user(char *t, char **name, char **email, unsigned long *date) { char *p = t; int mode = 1; while (p && *p) { if (mode == 1 && *p == '<') { *name = substr(t, p - 1); t = p; mode++; } else if (mode == 1 && *p == '\n') { The fix is to handle the case of (tail < head) before calling xmalloc, thus avoiding passing an invalid value to xmalloc. And here's the reproducer: It was tricky to reproduce, because git prohibits use of an empty "name" in a commit ID. To construct the offending commit, I had to resort to using "git hash-object". git init -q foo && ( cd foo && echo a > j && git add . && git ci -q --author='au <T at h.or>' -m. . && h=$(git cat-file commit HEAD|sed 's/au //' \ |git hash-object -t commit -w --stdin) && git co -q -b test $h && git br -q -D master && git br -q -m test master) git clone -q --bare foo foo.git cat <<EOF > in repo.url=foo.git repo.path=foo.git EOF CGIT_CONFIG=in QUERY_STRING=url=foo.git valgrind ./cgit The valgrind output is what you see above. AFAICS, this is not exploitable thanks (ironically) to the use of strncpy. Since that -1 translates to SIZE_MAX and this is strncpy, not only does it copy whatever is in "head" (up to first NUL), but it also writes SIZE_MAX - strlen(head) NUL bytes into the destination buffer, and that latter is guaranteed to evoke a segfault. Since cgit is single-threaded, AFAICS, there is no way that the buffer clobbering can be turned into an exploit.
* ui-snapshot: pass -n to gzip, to suppress timestampJason A. Donenfeld2012-09-271-8/+10
| | | | | | | | | | Since cgit snapshots of tags are often used for releases, we don't want the rarely used feature of the gzip compressor that includes an embedded timestamp into the archive, since this makes each tarball of the same (potentially signed) tag different. This commit refactors the archive handling code a bit so that each different format is able to run with an arbitrary argv for the filter.
* Update copyright headers to have latest dates.Jason A. Donenfeld2012-07-123-2/+3
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* ui-repolist: Case insensitive sorting and age sortJason A. Donenfeld2012-07-124-5/+37
| | | | | | Add two options, one for doing the ordinary name sorts in a case-insensitive manner, and another for choosing to sort repos in each section by age instead of by name.
* scan-tree: Support gitweb.category.Jason A. Donenfeld2012-07-124-0/+14
| | | | | Use gitweb.category from git config to determine repo's section, if option is enabled.
* scan-tree: Support gitweb.description.Jason A. Donenfeld2012-07-124-7/+28
| | | | | Use gitweb.description instead of description file to determine description, if option is enabled.
* css: only use div#cgitFerry Huberts2012-03-201-4/+1
| | | | | | | | Don't bother with 'body' and 'div#cgit form', since everything is wrapped in 'div#cgit' already. Removing these two types makes embedding even easier. Signed-off-by: Ferry Huberts <ferry.huberts@pelagic.nl>
* Merge branch 'fh/mimetypes'Lars Hjemli2012-03-184-1/+65
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| * ui_plain: automatically lookup mimetype when mimetype-file is setFerry Huberts2011-07-194-1/+65
| | | | | | | | | | | | | | | | | | | | | | | | For sites that do not want to configure mime types by hand but still want the correct mime type for 'plain' blobs, configuring a mime type file is made possible. This is handy since such a file is normally already provided (at least on Linux systems). Also, this reflects the gitweb option '$mimetypes_file' Signed-off-by: Ferry Huberts <ferry.huberts@pelagic.nl> Signed-off-by: Lars Hjemli <hjemli@gmail.com>
* | Merge branch 'jp/defbranch'Lars Hjemli2012-03-184-4/+18
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| * | ui-repolist.c: fallback to "master" if no default branch is specifiedLars Hjemli2011-07-191-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | When looking for the modtime of a repo we used to rely on repo.defbranch having a value. This is no longer true so this patch provides a default value when needed. Signed-off-by: Lars Hjemli <hjemli@gmail.com>
| * | cgit.c: use resolve_ref() to guess_defbranch()Lars Hjemli2011-06-201-27/+7
| | | | | | | | | | | | | | | | | | | | | | | | The resolve_ref() function handles reading of git- and filesystem symbolic links (including proper whitespace trimming) and packed refs. There's no point in reimplementing this function in cgit. Signed-off-by: Lars Hjemli <hjemli@gmail.com>
| * | Only guess default branch when a repo page is requestedLars Hjemli2011-06-203-38/+34
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There's no need to invoke guess_defbranch() for each repo during scan-path, since repo.defbranch is only used when repo content is being displayed. Also, some users prefer to register their projects manually in cgitrc but they got no benefit from the new repo.defbranch handling. This patch tries to rectify these issues by only invoking guess_defbranch() when needed, regardless of how the repo was registered. Signed-off-by: Lars Hjemli <hjemli@gmail.com>
| * | guess default branch from HEADJulius Plenz2011-06-202-1/+38
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a saner alternative than hardcoding the default branch to be "master". The add_repo() function will now check for a symbolic ref in repo_path/HEAD. If there is a suitable one, overwrite repo->defbranch with it. Note that you'll need to strip the newline from the file (-> len-17). If HEAD is a symbolic link pointing directly to a branch below refs/heads/, do a readlink() instead to find the ref name. Signed-off-by: Julius Plenz <plenz@cis.fu-berlin.de> Signed-off-by: Lars Hjemli <hjemli@gmail.com>
* | | Merge branch 'lh/module-links'Lars Hjemli2012-03-188-15/+85
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| * | | Do not provide a default value for `module-link`Lars Hjemli2011-06-152-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The old default value was an abomination which never should have been allowed to see the light of day. This patch removes the default, which is a backwards incompatible change with low probability of causing anyone any real trouble (a repo with submodules, displayed by cgit using the default value of `module-link`, is very unlikely to actually generate working links). Signed-off-by: Lars Hjemli <hjemli@gmail.com>
| * | | ui-plain.c: add support for path-selected submodule linksLars Hjemli2011-06-151-3/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In ui-plain.c, the links generated for submodule entry ignored the fact that the entry was in fact a submodule. This patch adds proper submodule links to the plain directory listings. Signed-off-by: Lars Hjemli <hjemli@gmail.com>
| * | | ui-tree.c: add support for path-selected submodule linksLars Hjemli2011-06-157-10/+78
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current 'repo.module-link' option is sufficient when all gitlinks in a repository can be converted to commit links in a uniform way, but not when different submodules/paths needs different settings. This patch adds support for 'repo.module-link.<path>', which will be used for linking to submodules at paths matching one such entry. Signed-off-by: Lars Hjemli <hjemli@gmail.com>
* | | | Merge branch 'stable'Lars Hjemli2012-03-183-3/+31
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| * | | | filters/syntax-highlighting.sh: work around highlight --force bugFerry Huberts2012-03-181-0/+17
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| * | | | filters/highlight.sh: manually support highlight version 2 and 3Ferry Huberts2012-03-181-0/+11
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| * | | | tests: properly quote arguments to printfFerry Huberts2012-03-181-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | v2: incorporate remarks of Lukas Signed-off-by: Ferry Huberts <ferry.huberts@pelagic.nl>
| * | | | tests: handle paths with whitespaceFerry Huberts2012-03-182-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | v2: incorporate remarks of Lukas Signed-off-by: Ferry Huberts <ferry.huberts@pelagic.nl>
* | | | | css: force text color to black on decorationsFerry Huberts2012-03-181-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | improves readability when embedding into a page that has the text color set to a different color Signed-off-by: Ferry Huberts <ferry.huberts@pelagic.nl>
* | | | | css: vertically align the cgit logo imageFerry Huberts2012-03-181-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When embedding cgit in other pages, the logo alignment needs to be specified to avoid any css rules from the embedding page to make the page look bad. Signed-off-by: Ferry Huberts <ferry.huberts@pelagic.nl>
* | | | | css: prefix all styles with div#cgitFerry Huberts2012-03-181-169/+169
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | to facilitate easier embedding Signed-off-by: Ferry Huberts <ferry.huberts@pelagic.nl>
* | | | | Merge branch 'stable'Lars Hjemli2012-03-181-1/+1
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| * | | | CGIT-0.9.0.3v0.9.0.3Lars Hjemli2012-03-181-1/+1
| | | | | | | | | | | | | | | | | | | | Signed-off-by: Lars Hjemli <hjemli@gmail.com>
* | | | | Merge branch 'stable'Lars Hjemli2012-03-182-7/+5
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| * | | | segfault fix on some bogus requestsEric Wong2012-03-181-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ctx.qry.head can be NULL in some cases due to bad requests by weird bots. I managed to reproduce with: PATH_INFO=/repo.git/shop.php QUERY_STRING=id= Signed-off-by: Eric Wong <normalperson@yhbt.net>
| * | | | use correct type for sizeofJamie Couture2012-03-181-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | **L would have worked well too. Depending on the distribution sizeof *L may return 8 instead of 4. **L is preferable, but since we don't expect this datatype to change very often, sizeof int is less subtle and easier to understand. Signed-off-by: Jamie Couture <jamie.couture@gmail.com>
| * | | | ui-ssdiff.c: correct length check for LCS tableEric Wong2012-01-081-4/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Each individual string may be too long for its respective dimension of the LCS table. Signed-off-by: Eric Wong <normalperson@yhbt.net>
* | | | | Merge branch 'stable'Lars Hjemli2012-01-031-1/+1
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| * | | | Fix segmentation fault in empty repositoryJohn Keeping2012-01-031-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When a repository is empty, the ATOM feed link is written in the header, but this involves formatting ctx->qry.head which is NULL in this case. With glibc, vsnprintf formats "%s" with a NULL input as "(null)" but on Solaris this results in a segmentation fault. Since we don't have a meaningful head for the atom feed in an empty repository, it's simplest not to write out the link element at all. Signed-off-by: John Keeping <john@metanate.com>
* | | | | Merge branch 'stable'Lars Hjemli2012-01-032-3/+3
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| * | | | Makefile: fetch git tarballs from http://hjemli.net/git/git/Lars Hjemli2012-01-031-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The git tarballs are currently not available from kernel.org, so for now the makefile will download autogenerated tarballs from cgit. Signed-off-by: Lars Hjemli <hjemli@gmail.com>
| * | | | fix css color value and vertical-align valueNorberto Lopes2012-01-031-2/+2
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* | | | | ui-ssdiff.c: set correct diffmode in "control panel"Tim Chen2012-01-031-3/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When side-by-side-diffs=1 was set in cgitrc, specifying 'ss=0' in the querystring would not set the 'unified' option as active in the dropdown box used to select diffmode.
* | | | | Merge branch 'stable'Lars Hjemli2012-01-039-17/+68
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| * | | | Fix diff mode switching when side-by-side-diffs=1Tim Chen2012-01-033-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When side-by-side-diffs=1 was set in cgitrc, specyfing 'ss=0' in the query- string would not switch to unified diffs. This patch fixes the issue by introducing a separate variable to track the occurrence of "ss" in the querystring.
| * | | | ui-log.c: do not show remote heads if enable-remote-branches=0Georg Müller2012-01-031-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | If remote branches are not enabled, the branches are still listed in the log view. This patch removes them if enable-remote-branches=0.
| * | | | Add sort parameter to pager of repo listTobias Grimm2012-01-033-13/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When the repolist is paged, the page-links are missing the sort parameter, causing the initial page to be custom sorted, but any clicked page will then be with the default sort order again.
| * | | | ui-ssdiff: move LCS table away from the stackJamie Couture2012-01-032-2/+43
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Printing deferred line changes for files containing long lines would cause a segfault. - limit LCS table size: 128x128. - move LCS table to global context: avoid allocating/freeing memory for every deferred line change. Signed-off-by: Jamie Couture <jamie.couture@gmail.com>
* | | | | shared.c: Only setenv() if value is non-nullLukas Fleischer2012-01-032-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some setenv() implementations (e.g. the one in OpenBSD's stdlib) segfault if we pass a NULL value. Only set environment variables if the corresponding settings are defined to avoid this. Note that this is a minor behaviour change as environment variables were supposed to be set to an empty string if a setting was undefined. Given that this feature isn't part of any official release yet, there's no need to worry about backwards compatibility, really. Change the documentation accordingly. Signed-off-by: Lukas Fleischer <cgit@cryptocrack.de>
* | | | | shared.c: Remove unused "linux/limits.h" includeLukas Fleischer2012-01-031-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This isn't used anywhere and prevents the code from being compiled on other platforms, such as *BSD. Signed-off-by: Lukas Fleischer <cgit@cryptocrack.de>
* | | | | Merge branch 'stable'Lars Hjemli2011-07-222-5/+7
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| * | | | Fix potential XSS vulnerability in rename hintLukas Fleischer2011-07-221-4/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The file name displayed in the rename hint should be escaped to avoid XSS. Note that this vulnerability is only applicable when an attacker has gained push access to the repository. Signed-off-by: Lukas Fleischer <cgit@cryptocrack.de> Signed-off-by: Lars Hjemli <hjemli@gmail.com>
| * | | | Remove dead initialization in cgit_parse_commit()Lukas Fleischer2011-07-221-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The value stored to "t" during its initialization gets overwritten in any case, so just leave it uninitialized. Spotted by clang-analyzer. Signed-off-by: Lukas Fleischer <cgit@cryptocrack.de> Signed-off-by: Lars Hjemli <hjemli@gmail.com>
* | | | | Merge branch 'stable'Lars Hjemli2011-07-212-3/+3
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| * | | | CGIT 0.9.0.2v0.9.0.2Lars Hjemli2011-07-211-1/+1
| | | | | | | | | | | | | | | | | | | | Signed-off-by: Lars Hjemli <hjemli@gmail.com>
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-27 09:14:56 +0000