Bugzilla – Bug 1137595
VUL-0: CVE-2019-11703,CVE-2019-11704,CVE-2019-11705,CVE-2019-11706: MozillaThunderbird: multiple vulnerabilities
Last modified: 2020-01-27 08:30:59 UTC
now public X41 D-Sec GmbH Security Advisory: X41-2019-001 Heap-based buffer overflow in Thunderbird ========================================= Severity Rating: High Confirmed Affected Versions: All versions affected Confirmed Patched Versions: Thunderbird ESR 60.7.XXX Vendor: Thunderbird Vendor URL: https://www.thunderbird.net/ Vendor Reference: https://bugzilla.mozilla.org/show_bug.cgi?id=1553814 Vector: Incoming mail with calendar attachment Credit: X41 D-SEC GmbH, Luis Merino Status: Public CVE: CVE-2019-11704 CWE: 122 CVSS Score: 7.8 CVSS Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O Advisory-URL: https://www.x41-dsec.de/lab/advisories/x41-2019-002-thunderbird Summary and Impact ================== A heap-based buffer overflow has been identified in the Thunderbird email client. The issue is present in the libical implementation, which was forked from upstream libical version 0.47. The issue can be triggered remotely, when an attacker sends an specially crafted calendar attachment and does not require user interaction. It might be used by a remote attacker to crash or gain remote code execution in the client system. This issue was initially reported by Brandon Perry here: https://bugzilla.mozilla.org/show_bug.cgi?id=1280832 and fixed in libical upstream, but was never fixed in Thunderbird. X41 did not perform a full test or audit on the software. Product Description =================== Thunderbird is a free and open source email, newsfeed, chat, and calendaring client, that's easy to set up and customize. Analysis ======== A heap-based buffer overflow in icalvalue.c icalmemory_strdup_and_dequote() can be triggered while parsing a calendar attachment containing a malformed or specially crafted string. ~~~ static char *icalmemorystrdupanddequote(const char *str) { char *out = (char *)malloc(sizeof(char) * strlen(str) + 1); char *pout = out; // ... for (p = str; *p!=0; p++){ if( *p == '\') { p++; // ... else { *pout = *p; } } ~~~ Bounds checking in `icalmemorystrdupanddequote()can be bypassed when the inputp` ends with a backslash, which enables an attacker to read out of bounds of the input buffer and writing out of bounds of a heap-allocated output buffer. The issue manifests in several ways, including out of bounds read and write, null-pointer dereference and frequently leads to heap corruption. It is expected that an attacker can exploit this vulnerability to achieve remote code execution. Proof of Concept ================ A reproducer EML file can be found in: https://github.com/x41sec/advisories/tree/master/X41-2019-001 Workarounds =========== A fix is available from upstream. Alternatively, libical can be replaced by icaljs, a JavaScript implementation of ical parsing, by setting calendar.icaljs = true in Thunderbird configuration. Timeline ======== 2016-06-19 Issue reported by Brandon Perry to the vendor 2019-05-23 Issue reported by X41 D-SEC to the vendor 2019-05-23 Vendor reply 2019-06-12 CVE IDs assigned 2019-06-13 Patched Version released 2019-06-13 Advisory released About X41 D-SEC GmbH ==================== X41 is an expert provider for application security services. Having extensive industry experience and expertise in the area of information security, a strong core security team of world class security experts enables X41 to perform premium security services. Fields of expertise in the area of application security are security centered code reviews, binary reverse engineering and vulnerability discovery. Custom research and a IT security consulting and support services are core competencies of X41.
X41 D-Sec GmbH Security Advisory: X41-2019-002 Heap-based buffer overflow in Thunderbird ========================================= Severity Rating: High Confirmed Affected Versions: All versions affected Confirmed Patched Versions: Thunderbird ESR 60.7.XXX Vendor: Thunderbird Vendor URL: https://www.thunderbird.net/ Vendor Reference: https://bugzilla.mozilla.org/show_bug.cgi?id=1553820 Vector: Incoming mail with calendar attachment Credit: X41 D-SEC GmbH, Luis Merino Status: Public CVE: CVE-2019-11703 CWE: 122 CVSS Score: 7.8 CVSS Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O Advisory-URL: https://www.x41-dsec.de/lab/advisories/x41-2019-002-thunderbird Summary and Impact ================== A heap-based buffer overflow has been identified in the Thunderbird email client. The issue is present in the libical implementation, which was forked from upstream libical version 0.47. The issue can be triggered remotely, when an attacker sends an specially crafted calendar attachment and does not require user interaction. It might be used by a remote attacker to crash or gain remote code execution in the client system. This issue was initially reported by Brandon Perry here: https://bugzilla.mozilla.org/show_bug.cgi?id=1281041 and fixed in libical upstream, but was never fixed in Thunderbird. X41 did not perform a full test or audit on the software. Product Description =================== Thunderbird is a free and open source email, newsfeed, chat, and calendaring client, that's easy to set up and customize. Analysis ======== A heap-based buffer overflow in icalparser.c parser_get_next_char() can be triggered while parsing a calendar attachment containing a malformed or specially crafted string. The issue initially manifests with out of bounds read, but we don't discard it could later lead to out of bounds write. It is expected that an attacker can exploit this vulnerability to achieve remote code execution. Proof of Concept ================ A reproducer ical file can be found in https://github.com/x41sec/advisories/tree/master/X41-2019-002 Workarounds =========== A fix is available from upstream. Alternatively, libical can be replaced by icaljs, a JavaScript implementation of ical parsing, by setting calendar.icaljs = true in Thunderbird configuration. Timeline ======== 2016-06-20 Issue reported by Brandon Perry to the vendor 2019-05-23 Issues reported to the vendor 2019-05-23 Vendor reply 2019-06-12 CVE IDs assigned 2019-06-13 Patched Version released 2019-06-13 Advisory released
X41 D-Sec GmbH Security Advisory: X41-2019-003 Stack-based buffer overflow in Thunderbird ========================================== Severity Rating: High Confirmed Affected Versions: All versions affected Confirmed Patched Versions: Thunderbird ESR 60.7.XXX Vendor: Thunderbird Vendor URL: https://www.thunderbird.net/ Vendor Reference: https://bugzilla.mozilla.org/show_bug.cgi?id=1553808 Vector: Incoming mail with calendar attachment Credit: X41 D-SEC GmbH, Luis Merino Status: Public CVE: CVE-2019-11705 CWE: 121 CVSS Score: 7.8 CVSS Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O Advisory-URL: https://www.x41-dsec.de/lab/advisories/x41-2019-003-thunderbird Summary and Impact ================== A stack-based buffer overflow has been identified in the Thunderbird email client. The issue is present in the libical implementation, which was forked from upstream libical version 0.47. The issue can be triggered remotely, when an attacker sends an specially crafted calendar attachment and does not require user interaction. It might be used by a remote attacker to crash or gain remote code execution in the client system. X41 did not perform a full test or audit on the software. Product Description =================== Thunderbird is a free and open source email, newsfeed, chat, and calendaring client, that's easy to set up and customize. Analysis ======== A stack-based buffer overflow in icalrecur.c icalrecur_add_bydayrules() can be triggered while parsing a calendar attachment containing a malformed or specially crafted string. ~~~ static int icalrecuraddbydayrules(struct icalrecurparser *parser, const char *vals) { short *array = parser->rt.byday; // ... while (n != 0) { // ... if (wd != ICALNOWEEKDAY) { array[i++] = (short) (sign * (wd + 8 * weekno)); array[i] = ICALRECURRENCEARRAYMAX; } } ~~~ Missing sanity checks in `icalrecuradd_bydayrules()can lead to out of bounds write in aarraywhenweekno` takes an invalid value. The issue manifests as an out-of-bounds write in a stack allocated buffer overflow. It is expected that an attacker can exploit this vulnerability to achieve remote code execution when proper stack smashing mitigations are missing. Proof of Concept ================ A reproducer eml file can be found in https://github.com/x41sec/advisories/tree/master/X41-2019-003 Workarounds =========== A fix is available from upstream. Alternatively, libical can be replaced by icaljs, a JavaScript implementation of ical parsing, by setting calendar.icaljs = true in Thunderbird configuration. Timeline ======== 2019-05-23 Issues reported to the vendor 2019-05-23 Vendor reply 2019-06-12 CVE IDs assigned 2019-06-13 Patched Version released 2019-06-13 Advisory released
X41 D-Sec GmbH Security Advisory: X41-2019-004 Type confusion in Thunderbird ============================= Severity Rating: Medium Confirmed Affected Versions: All versions affected Confirmed Patched Versions: Thunderbird ESR 60.7.XXX Vendor: Thunderbird Vendor URL: https://www.thunderbird.net/ Vendor Reference: https://bugzilla.mozilla.org/show_bug.cgi?id=1555646 Vector: Incoming mail with calendar attachment Credit: X41 D-SEC GmbH, Luis Merino Status: Public CVE: CVE-2019-11706 CWE: 843 CVSS Score: 6.5 CVSS Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O Advisory-URL: https://www.x41-dsec.de/lab/advisories/x41-2019-004-thunderbird Summary and Impact ================== A type confusion has been identified in the Thunderbird email client. The issue is present in the libical implementation, which was forked from upstream libical version 0.47. The issue can be triggered remotely, when an attacker sends an specially crafted calendar attachment and does not require user interaction. It might be used by a remote attacker to crash the process or leak information from the client system via calendar replies. X41 did not perform a full test or audit on the software. Product Description =================== Thunderbird is a free and open source email, newsfeed, chat, and calendaring client, that's easy to set up and customize. Analysis ======== A type confusion in icalproperty.c icaltimezone_get_vtimezone_properties() can be triggered while parsing a malformed calendar attachment. Missing sanity checks allows a TZID property to be parsed as ICALFLOATVALUE but it is later used as a string. The bug manifests with strdup(tzid); being called with tzid containing a bad pointer obtained by casting to char* from a float value, which typically means segfaulting by dereferencing a non-mapped memory page. An attacker might be able to deliver an input file containing specially crafted float values as TZID properties which could point to arbitrary memory positions. Certain conditions could allow to exfiltrate information via a calendar reply or other undetermined impact. Proof of Concept ================ A reproducer eml file can be found in https://github.com/x41sec/advisories/tree/master/X41-2019-004 Workarounds =========== A fix is available from upstream. Alternatively, libical can be replaced by icaljs, a JavaScript implementation of ical parsing, by setting calendar.icaljs = true in Thunderbird configuration. Timeline ======== 2019-05-30 Issues reported to the vendor 2019-06-07 Vendor reply 2019-06-12 CVE IDs assigned 2019-06-13 Patched Version released 2019-06-13 Advisory released
This is an autogenerated message for OBS integration: This bug (1137595) was mentioned in https://build.opensuse.org/request/show/709837 Factory / MozillaThunderbird https://build.opensuse.org/request/show/709838 42.3 / MozillaThunderbird
SUSE-SU-2019:1495-1: An update that fixes four vulnerabilities is now available. Category: security (important) Bug References: 1137595 CVE References: CVE-2019-11703,CVE-2019-11704,CVE-2019-11705,CVE-2019-11706 Sources used: SUSE Linux Enterprise Workstation Extension 15-SP1 (src): MozillaThunderbird-60.7.0-3.36.1 SUSE Linux Enterprise Workstation Extension 15 (src): MozillaThunderbird-60.7.0-3.36.1 NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.
openSUSE-SU-2019:1577-1: An update that fixes four vulnerabilities is now available. Category: security (important) Bug References: 1137595 CVE References: CVE-2019-11703,CVE-2019-11704,CVE-2019-11705,CVE-2019-11706 Sources used: openSUSE Leap 42.3 (src): MozillaThunderbird-60.7.1-95.1
openSUSE-SU-2019:1583-1: An update that fixes four vulnerabilities is now available. Category: security (important) Bug References: 1137595 CVE References: CVE-2019-11703,CVE-2019-11704,CVE-2019-11705,CVE-2019-11706 Sources used: openSUSE Leap 15.1 (src): MozillaThunderbird-60.7.0-lp151.2.4.1 openSUSE Leap 15.0 (src): MozillaThunderbird-60.7.0-lp150.3.41.1
SUSE-SU-2019:1683-1: An update that fixes 6 vulnerabilities is now available. Category: security (important) Bug References: 1137595,1138872 CVE References: CVE-2019-11703,CVE-2019-11704,CVE-2019-11705,CVE-2019-11706,CVE-2019-11707,CVE-2019-11708 Sources used: SUSE Linux Enterprise Workstation Extension 15-SP1 (src): MozillaThunderbird-60.7.2-3.43.1 SUSE Linux Enterprise Workstation Extension 15 (src): MozillaThunderbird-60.7.2-3.43.1 NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.
openSUSE-SU-2019:1606-1: An update that fixes 6 vulnerabilities is now available. Category: security (important) Bug References: 1137595,1138872 CVE References: CVE-2019-11703,CVE-2019-11704,CVE-2019-11705,CVE-2019-11706,CVE-2019-11707,CVE-2019-11708 Sources used: openSUSE Leap 15.1 (src): MozillaThunderbird-60.7.2-lp151.2.7.1 openSUSE Leap 15.0 (src): MozillaThunderbird-60.7.2-lp150.3.45.1
This is an autogenerated message for OBS integration: This bug (1137595) was mentioned in https://build.opensuse.org/request/show/711723 Backports:SLE-12 / MozillaThunderbird
openSUSE-SU-2019:1664-1: An update that fixes 22 vulnerabilities is now available. Category: security (important) Bug References: 1130694,1133267,1135824,1137595,1138872 CVE References: CVE-2018-18511,CVE-2019-11691,CVE-2019-11692,CVE-2019-11693,CVE-2019-11694,CVE-2019-11698,CVE-2019-11703,CVE-2019-11704,CVE-2019-11705,CVE-2019-11706,CVE-2019-11707,CVE-2019-11708,CVE-2019-5798,CVE-2019-7317,CVE-2019-9797,CVE-2019-9800,CVE-2019-9815,CVE-2019-9816,CVE-2019-9817,CVE-2019-9818,CVE-2019-9819,CVE-2019-9820 Sources used: SUSE Package Hub for SUSE Linux Enterprise 12 (src): MozillaThunderbird-60.7.2-85.1
Fixed months ago.